./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.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-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:38:17,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:38:17,551 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:38:17,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:38:17,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:38:17,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:38:17,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:38:17,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:38:17,582 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:38:17,583 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:38:17,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:38:17,583 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:38:17,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:38:17,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:38:17,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:38:17,585 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:38:17,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:38:17,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:38:17,586 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:38:17,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:38:17,587 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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2025-03-08 17:38:17,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:38:17,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:38:17,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:38:17,794 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:38:17,794 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:38:17,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-03-08 17:38:18,960 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb016adc/7195cc80b34943579b62e6c53b14a05f/FLAGd98d16067 [2025-03-08 17:38:19,169 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:38:19,170 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-03-08 17:38:19,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb016adc/7195cc80b34943579b62e6c53b14a05f/FLAGd98d16067 [2025-03-08 17:38:19,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb016adc/7195cc80b34943579b62e6c53b14a05f [2025-03-08 17:38:19,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:38:19,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:38:19,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:38:19,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:38:19,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:38:19,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b739f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19, skipping insertion in model container [2025-03-08 17:38:19,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:38:19,348 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-send-receive.wvr.c[3146,3159] [2025-03-08 17:38:19,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:38:19,368 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:38:19,384 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-send-receive.wvr.c[3146,3159] [2025-03-08 17:38:19,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:38:19,404 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:38:19,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19 WrapperNode [2025-03-08 17:38:19,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:38:19,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:38:19,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:38:19,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:38:19,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,415 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,433 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 139 [2025-03-08 17:38:19,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:38:19,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:38:19,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:38:19,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:38:19,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,459 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 17:38:19,459 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,464 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,468 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:38:19,468 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:38:19,468 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:38:19,468 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:38:19,469 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (1/1) ... [2025-03-08 17:38:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:38:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:19,492 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 17:38:19,494 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 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:38:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:38:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:38:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:38:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:38:19,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:38:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:38:19,511 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 17:38:19,580 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:38:19,581 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:38:19,770 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:38:19,771 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:38:19,890 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:38:19,890 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:38:19,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:38:19 BoogieIcfgContainer [2025-03-08 17:38:19,890 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:38:19,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:38:19,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:38:19,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:38:19,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:38:19" (1/3) ... [2025-03-08 17:38:19,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234fa380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:38:19, skipping insertion in model container [2025-03-08 17:38:19,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:19" (2/3) ... [2025-03-08 17:38:19,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234fa380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:38:19, skipping insertion in model container [2025-03-08 17:38:19,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:38:19" (3/3) ... [2025-03-08 17:38:19,896 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2025-03-08 17:38:19,905 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:38:19,906 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:38:19,906 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:38:19,954 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-08 17:38:19,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2025-03-08 17:38:20,001 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2025-03-08 17:38:20,004 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:38:20,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2025-03-08 17:38:20,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2025-03-08 17:38:20,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2025-03-08 17:38:20,015 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:38:20,026 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;@a13a948, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:38:20,026 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:38:20,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:38:20,039 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2025-03-08 17:38:20,039 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:38:20,039 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:20,040 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] [2025-03-08 17:38:20,040 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 1 more)] === [2025-03-08 17:38:20,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2109680172, now seen corresponding path program 1 times [2025-03-08 17:38:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688537433] [2025-03-08 17:38:20,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:20,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:38:20,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:20,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:20,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:20,562 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 17:38:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688537433] [2025-03-08 17:38:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688537433] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:20,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:38:20,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304496890] [2025-03-08 17:38:20,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:20,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:38:20,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:20,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:38:20,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:38:20,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:20,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 17:38:20,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:20,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:20,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:20,875 INFO L124 PetriNetUnfolderBase]: 627/1033 cut-off events. [2025-03-08 17:38:20,875 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2025-03-08 17:38:20,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 1033 events. 627/1033 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4645 event pairs, 66 based on Foata normal form. 100/1073 useless extension candidates. Maximal degree in co-relation 1956. Up to 350 conditions per place. [2025-03-08 17:38:20,885 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 56 selfloop transitions, 4 changer transitions 5/72 dead transitions. [2025-03-08 17:38:20,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 72 transitions, 304 flow [2025-03-08 17:38:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:38:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:38:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2025-03-08 17:38:20,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-03-08 17:38:20,896 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 5 states and 117 transitions. [2025-03-08 17:38:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 72 transitions, 304 flow [2025-03-08 17:38:20,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-08 17:38:20,901 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 90 flow [2025-03-08 17:38:20,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2025-03-08 17:38:20,906 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2025-03-08 17:38:20,906 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 90 flow [2025-03-08 17:38:20,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 17:38:20,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:20,907 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] [2025-03-08 17:38:20,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:38:20,908 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 1 more)] === [2025-03-08 17:38:20,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 797378811, now seen corresponding path program 1 times [2025-03-08 17:38:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:20,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625998406] [2025-03-08 17:38:20,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:20,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:20,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 17:38:20,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:38:20,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:20,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:20,969 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 17:38:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:20,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625998406] [2025-03-08 17:38:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625998406] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:20,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:38:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140161071] [2025-03-08 17:38:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:20,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:38:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:20,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:38:20,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:38:20,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:20,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 17:38:20,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:20,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,056 INFO L124 PetriNetUnfolderBase]: 329/567 cut-off events. [2025-03-08 17:38:21,056 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2025-03-08 17:38:21,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 567 events. 329/567 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2082 event pairs, 140 based on Foata normal form. 21/527 useless extension candidates. Maximal degree in co-relation 480. Up to 407 conditions per place. [2025-03-08 17:38:21,061 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 30 selfloop transitions, 3 changer transitions 1/41 dead transitions. [2025-03-08 17:38:21,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 178 flow [2025-03-08 17:38:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:38:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:38:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-03-08 17:38:21,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2025-03-08 17:38:21,063 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 90 flow. Second operand 3 states and 64 transitions. [2025-03-08 17:38:21,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 178 flow [2025-03-08 17:38:21,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:38:21,065 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 105 flow [2025-03-08 17:38:21,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2025-03-08 17:38:21,067 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2025-03-08 17:38:21,067 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 105 flow [2025-03-08 17:38:21,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 17:38:21,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:21,067 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 17:38:21,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:38:21,068 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 1 more)] === [2025-03-08 17:38:21,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -443279971, now seen corresponding path program 1 times [2025-03-08 17:38:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700239437] [2025-03-08 17:38:21,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:21,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:38:21,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:38:21,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:21,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:21,219 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 17:38:21,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700239437] [2025-03-08 17:38:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700239437] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:21,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:21,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:38:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733544431] [2025-03-08 17:38:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:21,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:21,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:21,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:21,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:21,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 17:38:21,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:21,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:21,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,323 INFO L124 PetriNetUnfolderBase]: 364/634 cut-off events. [2025-03-08 17:38:21,324 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2025-03-08 17:38:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 634 events. 364/634 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2428 event pairs, 263 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 705. Up to 499 conditions per place. [2025-03-08 17:38:21,328 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 27 selfloop transitions, 2 changer transitions 11/47 dead transitions. [2025-03-08 17:38:21,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 214 flow [2025-03-08 17:38:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2025-03-08 17:38:21,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-08 17:38:21,332 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 105 flow. Second operand 4 states and 78 transitions. [2025-03-08 17:38:21,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 214 flow [2025-03-08 17:38:21,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:38:21,335 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 116 flow [2025-03-08 17:38:21,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2025-03-08 17:38:21,336 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2025-03-08 17:38:21,336 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 116 flow [2025-03-08 17:38:21,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 17:38:21,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:21,337 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, 1] [2025-03-08 17:38:21,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:38:21,337 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 1 more)] === [2025-03-08 17:38:21,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1515313704, now seen corresponding path program 1 times [2025-03-08 17:38:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132489888] [2025-03-08 17:38:21,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:21,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:38:21,361 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:21,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:21,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132489888] [2025-03-08 17:38:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132489888] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:21,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:21,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:38:21,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116203987] [2025-03-08 17:38:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:21,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:21,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:21,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:21,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:21,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:21,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 17:38:21,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:21,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:21,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,591 INFO L124 PetriNetUnfolderBase]: 287/492 cut-off events. [2025-03-08 17:38:21,591 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2025-03-08 17:38:21,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 492 events. 287/492 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1681 event pairs, 54 based on Foata normal form. 24/499 useless extension candidates. Maximal degree in co-relation 1198. Up to 200 conditions per place. [2025-03-08 17:38:21,594 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 37 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2025-03-08 17:38:21,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 229 flow [2025-03-08 17:38:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2025-03-08 17:38:21,596 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2025-03-08 17:38:21,596 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 116 flow. Second operand 4 states and 77 transitions. [2025-03-08 17:38:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 229 flow [2025-03-08 17:38:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 221 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-08 17:38:21,597 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 120 flow [2025-03-08 17:38:21,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2025-03-08 17:38:21,598 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2025-03-08 17:38:21,598 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 120 flow [2025-03-08 17:38:21,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 17:38:21,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:21,598 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, 1] [2025-03-08 17:38:21,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:38:21,599 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 1 more)] === [2025-03-08 17:38:21,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1332999088, now seen corresponding path program 2 times [2025-03-08 17:38:21,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427423153] [2025-03-08 17:38:21,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:21,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:21,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 30 statements. [2025-03-08 17:38:21,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:38:21,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:21,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427423153] [2025-03-08 17:38:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427423153] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:21,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:21,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:38:21,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854675179] [2025-03-08 17:38:21,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:21,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:21,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:21,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:21,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:21,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:21,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 17:38:21,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:21,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:21,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,840 INFO L124 PetriNetUnfolderBase]: 359/615 cut-off events. [2025-03-08 17:38:21,841 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2025-03-08 17:38:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488 conditions, 615 events. 359/615 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2221 event pairs, 22 based on Foata normal form. 16/619 useless extension candidates. Maximal degree in co-relation 1467. Up to 199 conditions per place. [2025-03-08 17:38:21,846 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 54 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2025-03-08 17:38:21,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 321 flow [2025-03-08 17:38:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:38:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:38:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-08 17:38:21,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2025-03-08 17:38:21,847 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 120 flow. Second operand 5 states and 103 transitions. [2025-03-08 17:38:21,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 321 flow [2025-03-08 17:38:21,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 313 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:21,849 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 130 flow [2025-03-08 17:38:21,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2025-03-08 17:38:21,850 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2025-03-08 17:38:21,850 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 130 flow [2025-03-08 17:38:21,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 17:38:21,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:21,850 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, 1] [2025-03-08 17:38:21,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:38:21,850 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 1 more)] === [2025-03-08 17:38:21,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 960355754, now seen corresponding path program 3 times [2025-03-08 17:38:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053901385] [2025-03-08 17:38:21,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:38:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:21,863 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:21,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:21,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:38:21,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053901385] [2025-03-08 17:38:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053901385] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:22,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:38:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912901966] [2025-03-08 17:38:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:22,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:38:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:22,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:38:22,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:38:22,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2025-03-08 17:38:22,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 17:38:22,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:22,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2025-03-08 17:38:22,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:22,411 INFO L124 PetriNetUnfolderBase]: 1346/2136 cut-off events. [2025-03-08 17:38:22,411 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2025-03-08 17:38:22,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 2136 events. 1346/2136 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9969 event pairs, 217 based on Foata normal form. 30/2107 useless extension candidates. Maximal degree in co-relation 5327. Up to 728 conditions per place. [2025-03-08 17:38:22,430 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 82 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2025-03-08 17:38:22,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 100 transitions, 540 flow [2025-03-08 17:38:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:38:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:38:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2025-03-08 17:38:22,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2025-03-08 17:38:22,431 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 130 flow. Second operand 6 states and 137 transitions. [2025-03-08 17:38:22,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 100 transitions, 540 flow [2025-03-08 17:38:22,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 100 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:22,437 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 223 flow [2025-03-08 17:38:22,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2025-03-08 17:38:22,438 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2025-03-08 17:38:22,439 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 223 flow [2025-03-08 17:38:22,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 17:38:22,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:22,439 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, 1] [2025-03-08 17:38:22,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:38:22,440 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 1 more)] === [2025-03-08 17:38:22,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1071676766, now seen corresponding path program 4 times [2025-03-08 17:38:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:22,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139846482] [2025-03-08 17:38:22,440 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:22,458 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:22,466 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:22,467 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:22,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:22,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:22,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139846482] [2025-03-08 17:38:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139846482] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:22,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118614271] [2025-03-08 17:38:22,592 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:22,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:22,594 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 17:38:22,596 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 17:38:22,642 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:22,661 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:22,661 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:22,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:22,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:38:22,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:22,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118614271] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:22,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2025-03-08 17:38:22,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308225816] [2025-03-08 17:38:22,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:22,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:38:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:22,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:38:22,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:38:22,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2025-03-08 17:38:22,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 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 17:38:22,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:22,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2025-03-08 17:38:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:23,540 INFO L124 PetriNetUnfolderBase]: 3035/4514 cut-off events. [2025-03-08 17:38:23,541 INFO L125 PetriNetUnfolderBase]: For 4718/4718 co-relation queries the response was YES. [2025-03-08 17:38:23,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13208 conditions, 4514 events. 3035/4514 cut-off events. For 4718/4718 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21493 event pairs, 76 based on Foata normal form. 206/4527 useless extension candidates. Maximal degree in co-relation 13183. Up to 848 conditions per place. [2025-03-08 17:38:23,560 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 134 selfloop transitions, 40 changer transitions 49/226 dead transitions. [2025-03-08 17:38:23,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 226 transitions, 1359 flow [2025-03-08 17:38:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:38:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:38:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 330 transitions. [2025-03-08 17:38:23,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-08 17:38:23,563 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 223 flow. Second operand 22 states and 330 transitions. [2025-03-08 17:38:23,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 226 transitions, 1359 flow [2025-03-08 17:38:23,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 226 transitions, 1359 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:38:23,573 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 554 flow [2025-03-08 17:38:23,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2025-03-08 17:38:23,575 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2025-03-08 17:38:23,575 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 554 flow [2025-03-08 17:38:23,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 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 17:38:23,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:23,576 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, 1] [2025-03-08 17:38:23,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:38:23,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:23,777 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 1 more)] === [2025-03-08 17:38:23,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2005864276, now seen corresponding path program 5 times [2025-03-08 17:38:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082202172] [2025-03-08 17:38:23,777 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:38:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:23,784 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:23,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:23,804 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:23,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:24,458 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 17:38:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082202172] [2025-03-08 17:38:24,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082202172] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527138044] [2025-03-08 17:38:24,458 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:38:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:24,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:38:24,500 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-08 17:38:24,519 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:24,519 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:24,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:24,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:38:24,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:24,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-03-08 17:38:24,819 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 17:38:24,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:25,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2025-03-08 17:38:25,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:38:25,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2025-03-08 17:38:25,486 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 17:38:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527138044] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:25,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2025-03-08 17:38:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998299499] [2025-03-08 17:38:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:25,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:38:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:25,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:38:25,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:38:25,511 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2025-03-08 17:38:25,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 554 flow. Second operand has 29 states, 29 states have (on average 8.413793103448276) internal successors, (244), 29 states have internal predecessors, (244), 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 17:38:25,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:25,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2025-03-08 17:38:25,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:28,768 INFO L124 PetriNetUnfolderBase]: 9717/14860 cut-off events. [2025-03-08 17:38:28,768 INFO L125 PetriNetUnfolderBase]: For 74038/74038 co-relation queries the response was YES. [2025-03-08 17:38:28,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60512 conditions, 14860 events. 9717/14860 cut-off events. For 74038/74038 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 89979 event pairs, 1026 based on Foata normal form. 744/15600 useless extension candidates. Maximal degree in co-relation 53980. Up to 2581 conditions per place. [2025-03-08 17:38:28,861 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 362 selfloop transitions, 129 changer transitions 169/663 dead transitions. [2025-03-08 17:38:28,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 663 transitions, 6017 flow [2025-03-08 17:38:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-08 17:38:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-08 17:38:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 695 transitions. [2025-03-08 17:38:28,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4196859903381642 [2025-03-08 17:38:28,864 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 554 flow. Second operand 46 states and 695 transitions. [2025-03-08 17:38:28,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 663 transitions, 6017 flow [2025-03-08 17:38:28,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 663 transitions, 5925 flow, removed 38 selfloop flow, removed 1 redundant places. [2025-03-08 17:38:28,968 INFO L231 Difference]: Finished difference. Result has 156 places, 195 transitions, 1835 flow [2025-03-08 17:38:28,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1835, PETRI_PLACES=156, PETRI_TRANSITIONS=195} [2025-03-08 17:38:28,969 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2025-03-08 17:38:28,969 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 195 transitions, 1835 flow [2025-03-08 17:38:28,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.413793103448276) internal successors, (244), 29 states have internal predecessors, (244), 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 17:38:28,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:28,969 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 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 17:38:28,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:38:29,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-08 17:38:29,170 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 1 more)] === [2025-03-08 17:38:29,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1214832595, now seen corresponding path program 6 times [2025-03-08 17:38:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341223937] [2025-03-08 17:38:29,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:38:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:29,178 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-03-08 17:38:29,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 29 of 33 statements. [2025-03-08 17:38:29,187 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:38:29,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:38:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341223937] [2025-03-08 17:38:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341223937] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:29,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:29,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:38:29,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970930830] [2025-03-08 17:38:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:29,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:38:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:29,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:38:29,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:38:29,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:29,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 195 transitions, 1835 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 17:38:29,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:29,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:29,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:30,425 INFO L124 PetriNetUnfolderBase]: 4949/8529 cut-off events. [2025-03-08 17:38:30,425 INFO L125 PetriNetUnfolderBase]: For 115455/115619 co-relation queries the response was YES. [2025-03-08 17:38:30,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44965 conditions, 8529 events. 4949/8529 cut-off events. For 115455/115619 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57501 event pairs, 750 based on Foata normal form. 240/8497 useless extension candidates. Maximal degree in co-relation 39951. Up to 2578 conditions per place. [2025-03-08 17:38:30,496 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 158 selfloop transitions, 57 changer transitions 49/297 dead transitions. [2025-03-08 17:38:30,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 297 transitions, 3323 flow [2025-03-08 17:38:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:38:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:38:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2025-03-08 17:38:30,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-03-08 17:38:30,498 INFO L175 Difference]: Start difference. First operand has 156 places, 195 transitions, 1835 flow. Second operand 8 states and 158 transitions. [2025-03-08 17:38:30,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 297 transitions, 3323 flow [2025-03-08 17:38:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 297 transitions, 3026 flow, removed 82 selfloop flow, removed 9 redundant places. [2025-03-08 17:38:30,701 INFO L231 Difference]: Finished difference. Result has 156 places, 202 transitions, 1830 flow [2025-03-08 17:38:30,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1830, PETRI_PLACES=156, PETRI_TRANSITIONS=202} [2025-03-08 17:38:30,702 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2025-03-08 17:38:30,703 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 202 transitions, 1830 flow [2025-03-08 17:38:30,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 17:38:30,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:30,703 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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 17:38:30,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:38:30,704 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:38:30,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash 96506626, now seen corresponding path program 7 times [2025-03-08 17:38:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:30,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665892031] [2025-03-08 17:38:30,706 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:38:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:30,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 17:38:30,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 17:38:30,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:30,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665892031] [2025-03-08 17:38:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665892031] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:30,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:30,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:38:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231988419] [2025-03-08 17:38:30,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:30,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:38:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:30,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:38:30,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:38:30,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2025-03-08 17:38:30,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 202 transitions, 1830 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 17:38:30,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2025-03-08 17:38:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:32,332 INFO L124 PetriNetUnfolderBase]: 8181/14394 cut-off events. [2025-03-08 17:38:32,332 INFO L125 PetriNetUnfolderBase]: For 158735/159087 co-relation queries the response was YES. [2025-03-08 17:38:32,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75186 conditions, 14394 events. 8181/14394 cut-off events. For 158735/159087 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 105226 event pairs, 2336 based on Foata normal form. 368/14387 useless extension candidates. Maximal degree in co-relation 64841. Up to 6094 conditions per place. [2025-03-08 17:38:32,495 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 248 selfloop transitions, 47 changer transitions 1/329 dead transitions. [2025-03-08 17:38:32,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 329 transitions, 3650 flow [2025-03-08 17:38:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-03-08 17:38:32,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-08 17:38:32,496 INFO L175 Difference]: Start difference. First operand has 156 places, 202 transitions, 1830 flow. Second operand 4 states and 99 transitions. [2025-03-08 17:38:32,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 329 transitions, 3650 flow [2025-03-08 17:38:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 329 transitions, 3565 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:32,679 INFO L231 Difference]: Finished difference. Result has 158 places, 237 transitions, 2273 flow [2025-03-08 17:38:32,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2273, PETRI_PLACES=158, PETRI_TRANSITIONS=237} [2025-03-08 17:38:32,680 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2025-03-08 17:38:32,680 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 237 transitions, 2273 flow [2025-03-08 17:38:32,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 17:38:32,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:32,680 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:32,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:38:32,681 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:38:32,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1781294334, now seen corresponding path program 8 times [2025-03-08 17:38:32,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:32,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882002833] [2025-03-08 17:38:32,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:32,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:32,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:38:32,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:38:32,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:32,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882002833] [2025-03-08 17:38:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882002833] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:38:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051102386] [2025-03-08 17:38:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:32,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:32,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:32,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:32,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:32,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 36 [2025-03-08 17:38:32,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 237 transitions, 2273 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 17:38:32,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:32,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 36 [2025-03-08 17:38:32,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:34,888 INFO L124 PetriNetUnfolderBase]: 11624/19275 cut-off events. [2025-03-08 17:38:34,889 INFO L125 PetriNetUnfolderBase]: For 216454/216538 co-relation queries the response was YES. [2025-03-08 17:38:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105496 conditions, 19275 events. 11624/19275 cut-off events. For 216454/216538 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 130831 event pairs, 3076 based on Foata normal form. 1200/20312 useless extension candidates. Maximal degree in co-relation 92442. Up to 9635 conditions per place. [2025-03-08 17:38:35,023 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 219 selfloop transitions, 14 changer transitions 3/242 dead transitions. [2025-03-08 17:38:35,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 242 transitions, 2861 flow [2025-03-08 17:38:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2025-03-08 17:38:35,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-08 17:38:35,024 INFO L175 Difference]: Start difference. First operand has 158 places, 237 transitions, 2273 flow. Second operand 4 states and 78 transitions. [2025-03-08 17:38:35,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 242 transitions, 2861 flow [2025-03-08 17:38:35,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 242 transitions, 2799 flow, removed 29 selfloop flow, removed 6 redundant places. [2025-03-08 17:38:35,283 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 1834 flow [2025-03-08 17:38:35,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1834, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2025-03-08 17:38:35,284 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 111 predicate places. [2025-03-08 17:38:35,284 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 1834 flow [2025-03-08 17:38:35,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 17:38:35,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:35,284 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 17:38:35,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 17:38:35,284 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:38:35,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 308169016, now seen corresponding path program 1 times [2025-03-08 17:38:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015107065] [2025-03-08 17:38:35,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:35,290 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 17:38:35,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:38:35,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:35,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:36,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015107065] [2025-03-08 17:38:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015107065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:36,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832191580] [2025-03-08 17:38:36,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:36,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:36,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:38:36,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 17:38:36,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:38:36,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:36,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:36,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 17:38:36,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:36,757 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2025-03-08 17:38:36,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2025-03-08 17:38:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:36,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:37,240 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-03-08 17:38:37,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2025-03-08 17:38:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832191580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:37,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2025-03-08 17:38:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158786342] [2025-03-08 17:38:37,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:37,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 17:38:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:37,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 17:38:37,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 17:38:37,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 36 [2025-03-08 17:38:37,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 1834 flow. Second operand has 37 states, 37 states have (on average 9.64864864864865) internal successors, (357), 37 states have internal predecessors, (357), 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 17:38:37,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:37,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 36 [2025-03-08 17:38:37,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:00,879 INFO L124 PetriNetUnfolderBase]: 72279/118192 cut-off events. [2025-03-08 17:39:00,879 INFO L125 PetriNetUnfolderBase]: For 1325375/1325915 co-relation queries the response was YES. [2025-03-08 17:39:01,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612979 conditions, 118192 events. 72279/118192 cut-off events. For 1325375/1325915 co-relation queries the response was YES. Maximal size of possible extension queue 2179. Compared 987190 event pairs, 7069 based on Foata normal form. 6278/123693 useless extension candidates. Maximal degree in co-relation 587909. Up to 17796 conditions per place. [2025-03-08 17:39:02,042 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1723 selfloop transitions, 843 changer transitions 744/3316 dead transitions. [2025-03-08 17:39:02,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 3316 transitions, 36655 flow [2025-03-08 17:39:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2025-03-08 17:39:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2025-03-08 17:39:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 2944 transitions. [2025-03-08 17:39:02,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2025-03-08 17:39:02,048 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 1834 flow. Second operand 176 states and 2944 transitions. [2025-03-08 17:39:02,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 3316 transitions, 36655 flow [2025-03-08 17:39:04,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3316 transitions, 36245 flow, removed 202 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:04,044 INFO L231 Difference]: Finished difference. Result has 387 places, 1057 transitions, 13271 flow [2025-03-08 17:39:04,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=176, PETRI_FLOW=13271, PETRI_PLACES=387, PETRI_TRANSITIONS=1057} [2025-03-08 17:39:04,045 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 349 predicate places. [2025-03-08 17:39:04,045 INFO L471 AbstractCegarLoop]: Abstraction has has 387 places, 1057 transitions, 13271 flow [2025-03-08 17:39:04,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.64864864864865) internal successors, (357), 37 states have internal predecessors, (357), 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 17:39:04,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:04,046 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 17:39:04,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:39:04,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:04,247 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:39:04,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 584951108, now seen corresponding path program 2 times [2025-03-08 17:39:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:04,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212944443] [2025-03-08 17:39:04,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:04,253 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:39:04,274 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:39:04,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:04,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:05,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:05,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212944443] [2025-03-08 17:39:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212944443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623904320] [2025-03-08 17:39:05,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:05,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:05,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:39:05,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:39:05,178 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:39:05,200 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:39:05,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:05,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:05,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 17:39:05,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:05,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-03-08 17:39:05,586 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-03-08 17:39:05,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2025-03-08 17:39:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:05,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:06,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2025-03-08 17:39:06,491 INFO L349 Elim1Store]: treesize reduction 13, result has 71.1 percent of original size [2025-03-08 17:39:06,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 199 [2025-03-08 17:39:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:07,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623904320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:39:07,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:39:07,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2025-03-08 17:39:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484558052] [2025-03-08 17:39:07,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:39:07,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-08 17:39:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:07,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-08 17:39:07,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 17:39:07,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2025-03-08 17:39:07,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1057 transitions, 13271 flow. Second operand has 38 states, 38 states have (on average 8.578947368421053) internal successors, (326), 38 states have internal predecessors, (326), 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 17:39:07,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:07,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2025-03-08 17:39:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand