./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:34:03,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:34:03,737 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:34:03,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:34:03,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:34:03,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:34:03,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:34:03,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:34:03,755 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:34:03,755 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:34:03,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:34:03,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:34:03,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:34:03,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:34:03,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:34:03,757 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:34:03,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:34:03,757 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2025-02-06 04:34:03,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:34:03,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:34:03,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:34:03,980 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:34:03,980 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:34:03,981 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-02-06 04:34:05,119 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d8bcf452a/82784194e5ba4c21a4592061d5de43da/FLAG18db10beb [2025-02-06 04:34:05,440 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:34:05,440 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-02-06 04:34:05,459 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d8bcf452a/82784194e5ba4c21a4592061d5de43da/FLAG18db10beb [2025-02-06 04:34:05,474 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d8bcf452a/82784194e5ba4c21a4592061d5de43da [2025-02-06 04:34:05,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:34:05,477 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:34:05,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:34:05,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:34:05,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:34:05,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271fddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05, skipping insertion in model container [2025-02-06 04:34:05,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,492 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:34:05,636 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2025-02-06 04:34:05,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:34:05,655 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:34:05,679 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2025-02-06 04:34:05,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:34:05,697 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:34:05,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05 WrapperNode [2025-02-06 04:34:05,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:34:05,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:34:05,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:34:05,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:34:05,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,737 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2025-02-06 04:34:05,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:34:05,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:34:05,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:34:05,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:34:05,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,751 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,767 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2025-02-06 04:34:05,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,774 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:34:05,781 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:34:05,781 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:34:05,781 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:34:05,781 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (1/1) ... [2025-02-06 04:34:05,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:34:05,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:05,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:34:05,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:34:05,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:34:05,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:34:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:34:05,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:34:05,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:34:05,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:34:05,828 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:34:05,890 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:34:05,891 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:34:06,125 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:34:06,125 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:34:06,374 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:34:06,374 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:34:06,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:34:06 BoogieIcfgContainer [2025-02-06 04:34:06,375 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:34:06,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:34:06,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:34:06,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:34:06,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:34:05" (1/3) ... [2025-02-06 04:34:06,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d755c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:34:06, skipping insertion in model container [2025-02-06 04:34:06,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:05" (2/3) ... [2025-02-06 04:34:06,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d755c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:34:06, skipping insertion in model container [2025-02-06 04:34:06,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:34:06" (3/3) ... [2025-02-06 04:34:06,384 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2025-02-06 04:34:06,393 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:34:06,395 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-06 04:34:06,395 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:34:06,440 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:34:06,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2025-02-06 04:34:06,488 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-02-06 04:34:06,492 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:34:06,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-02-06 04:34:06,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2025-02-06 04:34:06,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2025-02-06 04:34:06,507 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:34:06,515 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;@7b68860c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:34:06,517 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:34:06,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:34:06,527 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2025-02-06 04:34:06,527 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:34:06,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:06,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:06,529 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:06,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1119953060, now seen corresponding path program 1 times [2025-02-06 04:34:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:06,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279316431] [2025-02-06 04:34:06,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:06,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:34:06,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:34:06,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:06,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:06,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279316431] [2025-02-06 04:34:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279316431] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:06,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:06,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:34:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576800125] [2025-02-06 04:34:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:06,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:34:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:06,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:34:06,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:34:06,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:06,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:06,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:06,800 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2025-02-06 04:34:06,800 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-06 04:34:06,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 388 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2025-02-06 04:34:06,803 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2025-02-06 04:34:06,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2025-02-06 04:34:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 04:34:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 04:34:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2025-02-06 04:34:06,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-02-06 04:34:06,815 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2025-02-06 04:34:06,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2025-02-06 04:34:06,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:34:06,821 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2025-02-06 04:34:06,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2025-02-06 04:34:06,827 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2025-02-06 04:34:06,827 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2025-02-06 04:34:06,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:06,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:06,828 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:06,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:34:06,829 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:06,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1061376096, now seen corresponding path program 1 times [2025-02-06 04:34:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542854881] [2025-02-06 04:34:06,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:06,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:34:06,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:34:06,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:06,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:07,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542854881] [2025-02-06 04:34:07,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542854881] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:07,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:07,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:34:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289386059] [2025-02-06 04:34:07,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:07,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:34:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:07,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:34:07,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:34:07,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:07,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:07,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:07,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:07,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:07,070 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2025-02-06 04:34:07,070 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:34:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2025-02-06 04:34:07,072 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2025-02-06 04:34:07,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2025-02-06 04:34:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:34:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:34:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2025-02-06 04:34:07,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2025-02-06 04:34:07,073 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2025-02-06 04:34:07,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2025-02-06 04:34:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:34:07,074 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2025-02-06 04:34:07,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2025-02-06 04:34:07,075 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2025-02-06 04:34:07,075 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2025-02-06 04:34:07,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:07,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:07,075 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:07,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:34:07,075 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:07,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 549008271, now seen corresponding path program 1 times [2025-02-06 04:34:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317129717] [2025-02-06 04:34:07,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:07,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 04:34:07,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:34:07,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:07,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:07,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:07,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317129717] [2025-02-06 04:34:07,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317129717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407964461] [2025-02-06 04:34:07,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:07,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:07,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:07,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:07,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:34:07,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 04:34:07,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:34:07,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:07,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:07,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:34:07,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:07,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407964461] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:07,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-06 04:34:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091605169] [2025-02-06 04:34:07,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:07,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:34:07,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:07,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:34:07,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:34:07,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:07,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:07,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:07,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:07,457 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2025-02-06 04:34:07,458 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:34:07,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2025-02-06 04:34:07,460 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2025-02-06 04:34:07,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2025-02-06 04:34:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2025-02-06 04:34:07,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2025-02-06 04:34:07,463 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2025-02-06 04:34:07,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2025-02-06 04:34:07,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:07,463 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2025-02-06 04:34:07,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2025-02-06 04:34:07,464 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-02-06 04:34:07,464 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2025-02-06 04:34:07,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:07,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:07,464 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:07,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:34:07,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:07,671 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:07,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 322466223, now seen corresponding path program 2 times [2025-02-06 04:34:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:07,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482393541] [2025-02-06 04:34:07,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:07,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:34:07,718 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-02-06 04:34:07,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:34:07,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:08,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482393541] [2025-02-06 04:34:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482393541] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:08,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:08,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:34:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434163570] [2025-02-06 04:34:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:08,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:34:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:08,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:34:08,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:34:08,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:08,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:08,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:08,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:08,267 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2025-02-06 04:34:08,267 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 04:34:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1534 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2025-02-06 04:34:08,270 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2025-02-06 04:34:08,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2025-02-06 04:34:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-02-06 04:34:08,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-02-06 04:34:08,271 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2025-02-06 04:34:08,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2025-02-06 04:34:08,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:08,272 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2025-02-06 04:34:08,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2025-02-06 04:34:08,273 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2025-02-06 04:34:08,273 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2025-02-06 04:34:08,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:08,273 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:08,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:34:08,273 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:08,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 739930327, now seen corresponding path program 3 times [2025-02-06 04:34:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:08,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516801435] [2025-02-06 04:34:08,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:08,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:34:08,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-02-06 04:34:08,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:34:08,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:08,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516801435] [2025-02-06 04:34:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516801435] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:08,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:08,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:34:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407148927] [2025-02-06 04:34:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:08,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:34:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:08,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:34:08,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:34:08,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:08,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:08,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:08,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:08,740 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2025-02-06 04:34:08,741 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2025-02-06 04:34:08,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2859 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2025-02-06 04:34:08,744 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2025-02-06 04:34:08,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2025-02-06 04:34:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2025-02-06 04:34:08,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2025-02-06 04:34:08,745 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2025-02-06 04:34:08,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2025-02-06 04:34:08,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:08,748 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2025-02-06 04:34:08,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2025-02-06 04:34:08,748 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2025-02-06 04:34:08,748 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2025-02-06 04:34:08,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:08,749 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:08,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:34:08,749 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:08,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2002308701, now seen corresponding path program 4 times [2025-02-06 04:34:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:08,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592314781] [2025-02-06 04:34:08,749 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:08,756 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:34:08,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:34:08,762 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:08,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:08,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:08,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592314781] [2025-02-06 04:34:08,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592314781] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:08,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:08,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:34:08,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320610008] [2025-02-06 04:34:08,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:08,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:34:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:08,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:34:08,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:34:08,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:08,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:09,172 INFO L124 PetriNetUnfolderBase]: 419/747 cut-off events. [2025-02-06 04:34:09,172 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2025-02-06 04:34:09,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 747 events. 419/747 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3451 event pairs, 44 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1976. Up to 560 conditions per place. [2025-02-06 04:34:09,181 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 43 selfloop transitions, 11 changer transitions 3/58 dead transitions. [2025-02-06 04:34:09,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 335 flow [2025-02-06 04:34:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-02-06 04:34:09,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2025-02-06 04:34:09,182 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 61 transitions. [2025-02-06 04:34:09,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 335 flow [2025-02-06 04:34:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 325 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-06 04:34:09,189 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2025-02-06 04:34:09,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2025-02-06 04:34:09,189 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2025-02-06 04:34:09,189 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2025-02-06 04:34:09,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:09,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:09,190 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:09,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:34:09,190 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:09,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 769724021, now seen corresponding path program 5 times [2025-02-06 04:34:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:09,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820261541] [2025-02-06 04:34:09,190 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:09,206 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:34:09,219 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:34:09,220 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:09,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:34:09,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820261541] [2025-02-06 04:34:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820261541] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446163696] [2025-02-06 04:34:09,464 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:09,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:09,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:09,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:34:09,515 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:34:09,533 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:34:09,534 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:09,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:09,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 04:34:09,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:09,744 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:34:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446163696] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:09,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:34:09,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2025-02-06 04:34:09,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739599310] [2025-02-06 04:34:09,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:09,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:34:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:09,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:34:09,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-06 04:34:09,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:09,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:09,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:09,919 INFO L124 PetriNetUnfolderBase]: 419/745 cut-off events. [2025-02-06 04:34:09,920 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2025-02-06 04:34:09,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 745 events. 419/745 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3203 event pairs, 173 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 2198. Up to 393 conditions per place. [2025-02-06 04:34:09,924 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 51 selfloop transitions, 10 changer transitions 4/66 dead transitions. [2025-02-06 04:34:09,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 447 flow [2025-02-06 04:34:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2025-02-06 04:34:09,925 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2025-02-06 04:34:09,925 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 5 states and 66 transitions. [2025-02-06 04:34:09,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 447 flow [2025-02-06 04:34:09,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 443 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:09,928 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 286 flow [2025-02-06 04:34:09,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2025-02-06 04:34:09,929 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2025-02-06 04:34:09,929 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 286 flow [2025-02-06 04:34:09,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:09,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:09,929 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:09,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 04:34:10,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,130 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:10,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1262467604, now seen corresponding path program 1 times [2025-02-06 04:34:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564927324] [2025-02-06 04:34:10,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:34:10,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:10,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:10,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:10,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564927324] [2025-02-06 04:34:10,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564927324] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:10,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652373322] [2025-02-06 04:34:10,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:10,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:10,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:34:10,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:34:10,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:10,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 04:34:10,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:10,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652373322] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:10,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:34:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-02-06 04:34:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361995471] [2025-02-06 04:34:10,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:10,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:10,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:10,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:34:10,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:10,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:10,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:10,709 INFO L124 PetriNetUnfolderBase]: 445/788 cut-off events. [2025-02-06 04:34:10,709 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2025-02-06 04:34:10,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 788 events. 445/788 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3578 event pairs, 80 based on Foata normal form. 18/806 useless extension candidates. Maximal degree in co-relation 2475. Up to 362 conditions per place. [2025-02-06 04:34:10,713 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 59 selfloop transitions, 11 changer transitions 2/73 dead transitions. [2025-02-06 04:34:10,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 538 flow [2025-02-06 04:34:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2025-02-06 04:34:10,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2025-02-06 04:34:10,714 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 286 flow. Second operand 5 states and 68 transitions. [2025-02-06 04:34:10,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 538 flow [2025-02-06 04:34:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 534 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-02-06 04:34:10,717 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 319 flow [2025-02-06 04:34:10,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2025-02-06 04:34:10,718 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2025-02-06 04:34:10,718 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 319 flow [2025-02-06 04:34:10,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:10,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:10,718 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:10,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 04:34:10,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,920 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:10,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1349997964, now seen corresponding path program 1 times [2025-02-06 04:34:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840616058] [2025-02-06 04:34:10,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:34:10,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:10,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840616058] [2025-02-06 04:34:11,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840616058] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673793505] [2025-02-06 04:34:11,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:11,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:11,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:11,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:34:11,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:34:11,092 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:11,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:11,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 04:34:11,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673793505] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:11,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:34:11,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-02-06 04:34:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258843584] [2025-02-06 04:34:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:11,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:34:11,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:11,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:11,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:11,338 INFO L124 PetriNetUnfolderBase]: 481/848 cut-off events. [2025-02-06 04:34:11,338 INFO L125 PetriNetUnfolderBase]: For 2013/2013 co-relation queries the response was YES. [2025-02-06 04:34:11,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 848 events. 481/848 cut-off events. For 2013/2013 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3803 event pairs, 92 based on Foata normal form. 8/856 useless extension candidates. Maximal degree in co-relation 2760. Up to 383 conditions per place. [2025-02-06 04:34:11,342 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 10 changer transitions 1/69 dead transitions. [2025-02-06 04:34:11,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 559 flow [2025-02-06 04:34:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-02-06 04:34:11,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-02-06 04:34:11,343 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 319 flow. Second operand 5 states and 64 transitions. [2025-02-06 04:34:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 559 flow [2025-02-06 04:34:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 534 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-02-06 04:34:11,348 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 353 flow [2025-02-06 04:34:11,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2025-02-06 04:34:11,348 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-02-06 04:34:11,349 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 353 flow [2025-02-06 04:34:11,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:11,349 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:11,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:11,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 04:34:11,550 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:11,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:11,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1245764488, now seen corresponding path program 2 times [2025-02-06 04:34:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:11,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887801370] [2025-02-06 04:34:11,551 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:11,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:11,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:34:11,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:11,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:11,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887801370] [2025-02-06 04:34:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887801370] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983071259] [2025-02-06 04:34:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:11,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:11,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:11,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:11,800 INFO L124 PetriNetUnfolderBase]: 470/822 cut-off events. [2025-02-06 04:34:11,800 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2025-02-06 04:34:11,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 822 events. 470/822 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3705 event pairs, 210 based on Foata normal form. 3/825 useless extension candidates. Maximal degree in co-relation 2777. Up to 431 conditions per place. [2025-02-06 04:34:11,803 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 11 changer transitions 10/74 dead transitions. [2025-02-06 04:34:11,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 621 flow [2025-02-06 04:34:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-02-06 04:34:11,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 04:34:11,804 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 353 flow. Second operand 5 states and 65 transitions. [2025-02-06 04:34:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 621 flow [2025-02-06 04:34:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 601 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 04:34:11,810 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 384 flow [2025-02-06 04:34:11,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2025-02-06 04:34:11,810 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2025-02-06 04:34:11,810 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 384 flow [2025-02-06 04:34:11,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:11,811 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:11,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 04:34:11,811 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:11,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 896399664, now seen corresponding path program 2 times [2025-02-06 04:34:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:11,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546416924] [2025-02-06 04:34:11,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:11,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:11,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:34:11,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-02-06 04:34:11,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:34:11,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546416924] [2025-02-06 04:34:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546416924] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:11,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:11,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763113459] [2025-02-06 04:34:11,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:11,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:11,881 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,040 INFO L124 PetriNetUnfolderBase]: 505/883 cut-off events. [2025-02-06 04:34:12,040 INFO L125 PetriNetUnfolderBase]: For 2850/2850 co-relation queries the response was YES. [2025-02-06 04:34:12,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 883 events. 505/883 cut-off events. For 2850/2850 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4014 event pairs, 213 based on Foata normal form. 9/892 useless extension candidates. Maximal degree in co-relation 3112. Up to 432 conditions per place. [2025-02-06 04:34:12,045 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 58 selfloop transitions, 13 changer transitions 2/74 dead transitions. [2025-02-06 04:34:12,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 626 flow [2025-02-06 04:34:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-02-06 04:34:12,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-02-06 04:34:12,046 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 384 flow. Second operand 5 states and 70 transitions. [2025-02-06 04:34:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 626 flow [2025-02-06 04:34:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 602 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 04:34:12,051 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 412 flow [2025-02-06 04:34:12,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2025-02-06 04:34:12,052 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2025-02-06 04:34:12,052 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 412 flow [2025-02-06 04:34:12,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,052 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 04:34:12,052 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:12,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2041870274, now seen corresponding path program 3 times [2025-02-06 04:34:12,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073296859] [2025-02-06 04:34:12,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:12,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 04:34:12,072 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-06 04:34:12,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:12,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:12,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073296859] [2025-02-06 04:34:12,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073296859] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:12,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:12,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318299256] [2025-02-06 04:34:12,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:12,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:12,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:12,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:12,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:12,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:12,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:12,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,277 INFO L124 PetriNetUnfolderBase]: 499/865 cut-off events. [2025-02-06 04:34:12,277 INFO L125 PetriNetUnfolderBase]: For 3001/3001 co-relation queries the response was YES. [2025-02-06 04:34:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 865 events. 499/865 cut-off events. For 3001/3001 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3891 event pairs, 239 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 3078. Up to 495 conditions per place. [2025-02-06 04:34:12,281 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 48 selfloop transitions, 11 changer transitions 6/66 dead transitions. [2025-02-06 04:34:12,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 577 flow [2025-02-06 04:34:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-02-06 04:34:12,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2025-02-06 04:34:12,282 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 412 flow. Second operand 5 states and 62 transitions. [2025-02-06 04:34:12,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 577 flow [2025-02-06 04:34:12,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 564 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:12,288 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 396 flow [2025-02-06 04:34:12,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-02-06 04:34:12,288 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-02-06 04:34:12,288 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 396 flow [2025-02-06 04:34:12,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,289 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 04:34:12,289 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:12,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1766336772, now seen corresponding path program 3 times [2025-02-06 04:34:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351821985] [2025-02-06 04:34:12,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 04:34:12,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-06 04:34:12,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:12,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351821985] [2025-02-06 04:34:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351821985] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:12,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:12,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386100997] [2025-02-06 04:34:12,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:12,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:12,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:12,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:12,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:12,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 396 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:12,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:12,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,516 INFO L124 PetriNetUnfolderBase]: 489/849 cut-off events. [2025-02-06 04:34:12,516 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2025-02-06 04:34:12,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 849 events. 489/849 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3737 event pairs, 232 based on Foata normal form. 3/852 useless extension candidates. Maximal degree in co-relation 3013. Up to 443 conditions per place. [2025-02-06 04:34:12,520 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 47 selfloop transitions, 12 changer transitions 7/67 dead transitions. [2025-02-06 04:34:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 606 flow [2025-02-06 04:34:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-02-06 04:34:12,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-02-06 04:34:12,521 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 396 flow. Second operand 5 states and 64 transitions. [2025-02-06 04:34:12,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 606 flow [2025-02-06 04:34:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 582 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-02-06 04:34:12,526 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2025-02-06 04:34:12,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-02-06 04:34:12,527 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-02-06 04:34:12,527 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2025-02-06 04:34:12,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,527 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 04:34:12,527 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:12,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2135205098, now seen corresponding path program 4 times [2025-02-06 04:34:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027935084] [2025-02-06 04:34:12,528 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:12,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,534 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:34:12,539 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:12,539 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:12,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027935084] [2025-02-06 04:34:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027935084] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:12,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:12,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480802557] [2025-02-06 04:34:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:12,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:12,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:12,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:12,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:12,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:12,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,749 INFO L124 PetriNetUnfolderBase]: 460/792 cut-off events. [2025-02-06 04:34:12,749 INFO L125 PetriNetUnfolderBase]: For 3164/3164 co-relation queries the response was YES. [2025-02-06 04:34:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2847 conditions, 792 events. 460/792 cut-off events. For 3164/3164 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3394 event pairs, 195 based on Foata normal form. 8/800 useless extension candidates. Maximal degree in co-relation 2822. Up to 355 conditions per place. [2025-02-06 04:34:12,754 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 51 selfloop transitions, 13 changer transitions 3/68 dead transitions. [2025-02-06 04:34:12,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 610 flow [2025-02-06 04:34:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-02-06 04:34:12,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 04:34:12,755 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 65 transitions. [2025-02-06 04:34:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 610 flow [2025-02-06 04:34:12,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 580 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 04:34:12,760 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2025-02-06 04:34:12,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-02-06 04:34:12,761 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-02-06 04:34:12,761 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2025-02-06 04:34:12,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,761 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 04:34:12,761 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:12,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1668721556, now seen corresponding path program 4 times [2025-02-06 04:34:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563617927] [2025-02-06 04:34:12,762 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,768 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:34:12,773 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:12,773 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:12,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:12,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563617927] [2025-02-06 04:34:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563617927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292183434] [2025-02-06 04:34:12,846 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:12,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:12,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 04:34:12,904 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:34:12,922 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:12,922 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:12,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 04:34:12,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:12,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292183434] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:13,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:34:13,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2025-02-06 04:34:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439977959] [2025-02-06 04:34:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:13,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:13,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:13,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-02-06 04:34:13,036 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:13,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:13,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:13,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:13,168 INFO L124 PetriNetUnfolderBase]: 448/775 cut-off events. [2025-02-06 04:34:13,168 INFO L125 PetriNetUnfolderBase]: For 3020/3020 co-relation queries the response was YES. [2025-02-06 04:34:13,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2750 conditions, 775 events. 448/775 cut-off events. For 3020/3020 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3317 event pairs, 191 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 2725. Up to 405 conditions per place. [2025-02-06 04:34:13,172 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 13 changer transitions 3/69 dead transitions. [2025-02-06 04:34:13,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 624 flow [2025-02-06 04:34:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2025-02-06 04:34:13,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2025-02-06 04:34:13,173 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 66 transitions. [2025-02-06 04:34:13,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 624 flow [2025-02-06 04:34:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 576 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-06 04:34:13,178 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 383 flow [2025-02-06 04:34:13,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2025-02-06 04:34:13,178 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2025-02-06 04:34:13,178 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 383 flow [2025-02-06 04:34:13,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:13,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:13,178 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:13,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 04:34:13,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-06 04:34:13,383 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:13,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1038475130, now seen corresponding path program 5 times [2025-02-06 04:34:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144460853] [2025-02-06 04:34:13,384 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:13,390 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-06 04:34:13,400 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:13,400 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:13,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:34:13,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144460853] [2025-02-06 04:34:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144460853] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790542255] [2025-02-06 04:34:13,514 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:13,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:13,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 04:34:13,572 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-06 04:34:13,592 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:34:13,593 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:13,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:13,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:34:13,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:13,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:34:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790542255] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:34:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-02-06 04:34:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022068250] [2025-02-06 04:34:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:13,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:13,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:13,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:34:13,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:13,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:13,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:13,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:13,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:13,845 INFO L124 PetriNetUnfolderBase]: 441/754 cut-off events. [2025-02-06 04:34:13,845 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2025-02-06 04:34:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 754 events. 441/754 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3188 event pairs, 187 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 2588. Up to 405 conditions per place. [2025-02-06 04:34:13,849 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 45 selfloop transitions, 11 changer transitions 6/63 dead transitions. [2025-02-06 04:34:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 555 flow [2025-02-06 04:34:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-02-06 04:34:13,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2025-02-06 04:34:13,850 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 383 flow. Second operand 5 states and 59 transitions. [2025-02-06 04:34:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 555 flow [2025-02-06 04:34:13,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 505 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-02-06 04:34:13,855 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 337 flow [2025-02-06 04:34:13,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2025-02-06 04:34:13,856 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2025-02-06 04:34:13,856 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 337 flow [2025-02-06 04:34:13,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:13,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:13,856 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:13,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:14,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 04:34:14,057 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:14,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash -656545109, now seen corresponding path program 1 times [2025-02-06 04:34:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:14,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117014943] [2025-02-06 04:34:14,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:14,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:34:14,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:14,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:14,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117014943] [2025-02-06 04:34:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117014943] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930396827] [2025-02-06 04:34:14,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:14,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:14,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 04:34:14,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:34:15,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:15,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:15,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:15,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:15,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:15,393 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 162 treesize of output 106 [2025-02-06 04:34:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:15,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:16,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:16,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 237 treesize of output 149 [2025-02-06 04:34:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930396827] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:16,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:16,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2025-02-06 04:34:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418266313] [2025-02-06 04:34:16,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:16,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:16,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:16,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:16,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:16,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:16,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 337 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:16,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:16,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:16,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:20,411 INFO L124 PetriNetUnfolderBase]: 1142/2012 cut-off events. [2025-02-06 04:34:20,411 INFO L125 PetriNetUnfolderBase]: For 3845/3845 co-relation queries the response was YES. [2025-02-06 04:34:20,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6278 conditions, 2012 events. 1142/2012 cut-off events. For 3845/3845 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10755 event pairs, 172 based on Foata normal form. 9/2021 useless extension candidates. Maximal degree in co-relation 6257. Up to 357 conditions per place. [2025-02-06 04:34:20,420 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 187 selfloop transitions, 58 changer transitions 35/281 dead transitions. [2025-02-06 04:34:20,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 281 transitions, 1896 flow [2025-02-06 04:34:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-06 04:34:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-02-06 04:34:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2025-02-06 04:34:20,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-02-06 04:34:20,423 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 337 flow. Second operand 33 states and 351 transitions. [2025-02-06 04:34:20,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 281 transitions, 1896 flow [2025-02-06 04:34:20,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 281 transitions, 1824 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 04:34:20,432 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 933 flow [2025-02-06 04:34:20,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=933, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2025-02-06 04:34:20,432 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2025-02-06 04:34:20,433 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 933 flow [2025-02-06 04:34:20,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:20,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:20,433 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:20,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:20,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:20,637 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:20,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2084032805, now seen corresponding path program 2 times [2025-02-06 04:34:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352077423] [2025-02-06 04:34:20,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:20,650 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:20,689 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:20,689 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:20,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:21,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352077423] [2025-02-06 04:34:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352077423] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237717184] [2025-02-06 04:34:21,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:21,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:21,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 04:34:21,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:21,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:21,331 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:21,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:21,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 04:34:21,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:21,735 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 131 treesize of output 83 [2025-02-06 04:34:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:21,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:22,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:22,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 398 treesize of output 246 [2025-02-06 04:34:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:23,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237717184] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:23,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-02-06 04:34:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648499910] [2025-02-06 04:34:23,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:23,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:23,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:23,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:23,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:23,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 933 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:23,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:23,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:23,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:24,588 INFO L124 PetriNetUnfolderBase]: 1335/2393 cut-off events. [2025-02-06 04:34:24,588 INFO L125 PetriNetUnfolderBase]: For 7850/7850 co-relation queries the response was YES. [2025-02-06 04:34:24,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8526 conditions, 2393 events. 1335/2393 cut-off events. For 7850/7850 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13476 event pairs, 494 based on Foata normal form. 5/2398 useless extension candidates. Maximal degree in co-relation 8495. Up to 1104 conditions per place. [2025-02-06 04:34:24,602 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 120 selfloop transitions, 68 changer transitions 20/209 dead transitions. [2025-02-06 04:34:24,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 209 transitions, 1899 flow [2025-02-06 04:34:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:34:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:34:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 190 transitions. [2025-02-06 04:34:24,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2025-02-06 04:34:24,604 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 933 flow. Second operand 19 states and 190 transitions. [2025-02-06 04:34:24,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 209 transitions, 1899 flow [2025-02-06 04:34:24,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 209 transitions, 1663 flow, removed 100 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:24,627 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1218 flow [2025-02-06 04:34:24,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1218, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2025-02-06 04:34:24,628 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2025-02-06 04:34:24,629 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1218 flow [2025-02-06 04:34:24,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:24,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:24,629 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:24,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 04:34:24,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 04:34:24,830 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:24,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 763952195, now seen corresponding path program 3 times [2025-02-06 04:34:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668885575] [2025-02-06 04:34:24,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:24,838 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-06 04:34:24,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 22 of 25 statements. [2025-02-06 04:34:24,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:34:24,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668885575] [2025-02-06 04:34:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668885575] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:25,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 04:34:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471915333] [2025-02-06 04:34:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:25,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 04:34:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:25,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 04:34:25,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2025-02-06 04:34:25,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:25,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1218 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:25,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:25,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:25,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:25,797 INFO L124 PetriNetUnfolderBase]: 1408/2522 cut-off events. [2025-02-06 04:34:25,797 INFO L125 PetriNetUnfolderBase]: For 12862/12862 co-relation queries the response was YES. [2025-02-06 04:34:25,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 2522 events. 1408/2522 cut-off events. For 12862/12862 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14511 event pairs, 827 based on Foata normal form. 1/2523 useless extension candidates. Maximal degree in co-relation 9218. Up to 1942 conditions per place. [2025-02-06 04:34:25,810 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 136 selfloop transitions, 29 changer transitions 9/175 dead transitions. [2025-02-06 04:34:25,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 175 transitions, 1797 flow [2025-02-06 04:34:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2025-02-06 04:34:25,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2025-02-06 04:34:25,812 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1218 flow. Second operand 10 states and 99 transitions. [2025-02-06 04:34:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 175 transitions, 1797 flow [2025-02-06 04:34:25,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1686 flow, removed 40 selfloop flow, removed 6 redundant places. [2025-02-06 04:34:25,838 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 1314 flow [2025-02-06 04:34:25,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1314, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2025-02-06 04:34:25,839 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2025-02-06 04:34:25,839 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 1314 flow [2025-02-06 04:34:25,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:25,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:25,840 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:25,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-06 04:34:25,840 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:25,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1770962161, now seen corresponding path program 4 times [2025-02-06 04:34:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:25,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010760213] [2025-02-06 04:34:25,841 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:25,848 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:25,865 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:25,865 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:25,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:26,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:26,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010760213] [2025-02-06 04:34:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010760213] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:26,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327432722] [2025-02-06 04:34:26,278 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:26,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:26,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:26,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 04:34:26,336 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:26,359 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:26,359 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:26,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:26,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 04:34:26,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:26,587 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 143 treesize of output 95 [2025-02-06 04:34:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:26,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:27,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:27,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 394 treesize of output 250 [2025-02-06 04:34:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327432722] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:28,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:28,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2025-02-06 04:34:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761759859] [2025-02-06 04:34:28,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:28,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:34:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:28,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:34:28,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:34:28,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:28,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 1314 flow. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:28,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:28,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:28,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:30,448 INFO L124 PetriNetUnfolderBase]: 1555/2813 cut-off events. [2025-02-06 04:34:30,448 INFO L125 PetriNetUnfolderBase]: For 16728/16728 co-relation queries the response was YES. [2025-02-06 04:34:30,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 2813 events. 1555/2813 cut-off events. For 16728/16728 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16509 event pairs, 501 based on Foata normal form. 9/2822 useless extension candidates. Maximal degree in co-relation 11077. Up to 1147 conditions per place. [2025-02-06 04:34:30,461 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 154 selfloop transitions, 91 changer transitions 29/275 dead transitions. [2025-02-06 04:34:30,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 275 transitions, 2685 flow [2025-02-06 04:34:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:34:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:34:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 253 transitions. [2025-02-06 04:34:30,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892307692307692 [2025-02-06 04:34:30,463 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 1314 flow. Second operand 25 states and 253 transitions. [2025-02-06 04:34:30,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 275 transitions, 2685 flow [2025-02-06 04:34:30,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 275 transitions, 2588 flow, removed 39 selfloop flow, removed 5 redundant places. [2025-02-06 04:34:30,502 INFO L231 Difference]: Finished difference. Result has 141 places, 157 transitions, 1752 flow [2025-02-06 04:34:30,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1752, PETRI_PLACES=141, PETRI_TRANSITIONS=157} [2025-02-06 04:34:30,503 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2025-02-06 04:34:30,503 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 157 transitions, 1752 flow [2025-02-06 04:34:30,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:30,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:30,503 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:30,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 04:34:30,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:30,708 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:30,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1307715529, now seen corresponding path program 5 times [2025-02-06 04:34:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:30,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683562493] [2025-02-06 04:34:30,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:30,715 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-02-06 04:34:30,736 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:30,736 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:30,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683562493] [2025-02-06 04:34:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683562493] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 04:34:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6072526] [2025-02-06 04:34:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:31,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 04:34:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:31,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 04:34:31,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-06 04:34:31,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:31,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 157 transitions, 1752 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:31,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:31,614 INFO L124 PetriNetUnfolderBase]: 1589/2862 cut-off events. [2025-02-06 04:34:31,615 INFO L125 PetriNetUnfolderBase]: For 26539/26539 co-relation queries the response was YES. [2025-02-06 04:34:31,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12530 conditions, 2862 events. 1589/2862 cut-off events. For 26539/26539 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16958 event pairs, 936 based on Foata normal form. 4/2866 useless extension candidates. Maximal degree in co-relation 12490. Up to 2154 conditions per place. [2025-02-06 04:34:31,625 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 152 selfloop transitions, 37 changer transitions 9/199 dead transitions. [2025-02-06 04:34:31,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 2392 flow [2025-02-06 04:34:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2025-02-06 04:34:31,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39615384615384613 [2025-02-06 04:34:31,626 INFO L175 Difference]: Start difference. First operand has 141 places, 157 transitions, 1752 flow. Second operand 10 states and 103 transitions. [2025-02-06 04:34:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 2392 flow [2025-02-06 04:34:31,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 199 transitions, 2184 flow, removed 70 selfloop flow, removed 12 redundant places. [2025-02-06 04:34:31,689 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1743 flow [2025-02-06 04:34:31,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1743, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2025-02-06 04:34:31,689 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2025-02-06 04:34:31,689 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1743 flow [2025-02-06 04:34:31,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:31,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:31,690 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:31,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 04:34:31,690 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:31,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1826241509, now seen corresponding path program 6 times [2025-02-06 04:34:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592410070] [2025-02-06 04:34:31,691 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:31,697 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-02-06 04:34:31,709 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:31,709 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:31,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592410070] [2025-02-06 04:34:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592410070] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062980537] [2025-02-06 04:34:32,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:32,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:32,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 04:34:32,239 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-02-06 04:34:32,259 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:32,259 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:32,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:32,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:34:32,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:32,595 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 76 [2025-02-06 04:34:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:32,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:33,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:33,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 254 treesize of output 174 [2025-02-06 04:34:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:33,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062980537] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:33,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:33,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2025-02-06 04:34:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753364761] [2025-02-06 04:34:33,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:33,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:34:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:33,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:34:33,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:34:33,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:33,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1743 flow. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:33,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:33,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:33,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:35,827 INFO L124 PetriNetUnfolderBase]: 1779/3241 cut-off events. [2025-02-06 04:34:35,827 INFO L125 PetriNetUnfolderBase]: For 33367/33367 co-relation queries the response was YES. [2025-02-06 04:34:35,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14282 conditions, 3241 events. 1779/3241 cut-off events. For 33367/33367 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20073 event pairs, 534 based on Foata normal form. 3/3244 useless extension candidates. Maximal degree in co-relation 14242. Up to 1316 conditions per place. [2025-02-06 04:34:35,840 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 165 selfloop transitions, 132 changer transitions 29/327 dead transitions. [2025-02-06 04:34:35,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 327 transitions, 3580 flow [2025-02-06 04:34:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:34:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:34:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 239 transitions. [2025-02-06 04:34:35,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3676923076923077 [2025-02-06 04:34:35,841 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1743 flow. Second operand 25 states and 239 transitions. [2025-02-06 04:34:35,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 327 transitions, 3580 flow [2025-02-06 04:34:35,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 327 transitions, 3457 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-02-06 04:34:35,920 INFO L231 Difference]: Finished difference. Result has 164 places, 217 transitions, 2797 flow [2025-02-06 04:34:35,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2797, PETRI_PLACES=164, PETRI_TRANSITIONS=217} [2025-02-06 04:34:35,920 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 139 predicate places. [2025-02-06 04:34:35,920 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 217 transitions, 2797 flow [2025-02-06 04:34:35,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:35,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:35,921 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:35,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:36,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:36,122 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:36,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1566591157, now seen corresponding path program 7 times [2025-02-06 04:34:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188751686] [2025-02-06 04:34:36,124 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:36,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:34:36,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:36,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:36,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188751686] [2025-02-06 04:34:36,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188751686] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496337144] [2025-02-06 04:34:36,549 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:36,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:36,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:36,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 04:34:36,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:34:36,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:36,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:36,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:36,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 04:34:36,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:36,909 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 204 treesize of output 132 [2025-02-06 04:34:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:37,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:38,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:38,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 199 treesize of output 131 [2025-02-06 04:34:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496337144] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:38,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2025-02-06 04:34:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329570138] [2025-02-06 04:34:38,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:38,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:38,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:38,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:38,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:38,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:38,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 217 transitions, 2797 flow. Second operand has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:38,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:38,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:38,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:41,270 INFO L124 PetriNetUnfolderBase]: 2656/4950 cut-off events. [2025-02-06 04:34:41,270 INFO L125 PetriNetUnfolderBase]: For 77037/77037 co-relation queries the response was YES. [2025-02-06 04:34:41,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 4950 events. 2656/4950 cut-off events. For 77037/77037 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33249 event pairs, 631 based on Foata normal form. 9/4959 useless extension candidates. Maximal degree in co-relation 24531. Up to 1028 conditions per place. [2025-02-06 04:34:41,295 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 297 selfloop transitions, 155 changer transitions 31/484 dead transitions. [2025-02-06 04:34:41,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 484 transitions, 6411 flow [2025-02-06 04:34:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-06 04:34:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-06 04:34:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 316 transitions. [2025-02-06 04:34:41,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3920595533498759 [2025-02-06 04:34:41,298 INFO L175 Difference]: Start difference. First operand has 164 places, 217 transitions, 2797 flow. Second operand 31 states and 316 transitions. [2025-02-06 04:34:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 484 transitions, 6411 flow [2025-02-06 04:34:41,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 484 transitions, 5771 flow, removed 317 selfloop flow, removed 5 redundant places. [2025-02-06 04:34:41,738 INFO L231 Difference]: Finished difference. Result has 200 places, 290 transitions, 4106 flow [2025-02-06 04:34:41,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4106, PETRI_PLACES=200, PETRI_TRANSITIONS=290} [2025-02-06 04:34:41,739 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2025-02-06 04:34:41,739 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 290 transitions, 4106 flow [2025-02-06 04:34:41,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:41,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:41,740 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:41,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 04:34:41,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-06 04:34:41,941 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:41,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash 801466567, now seen corresponding path program 8 times [2025-02-06 04:34:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423880179] [2025-02-06 04:34:41,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:41,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:41,949 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:41,958 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:41,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:41,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423880179] [2025-02-06 04:34:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423880179] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271893923] [2025-02-06 04:34:42,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:42,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:42,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 04:34:42,484 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 04:34:42,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:42,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:42,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:42,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 04:34:42,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:42,787 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 161 treesize of output 105 [2025-02-06 04:34:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:42,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:44,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:44,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 393 treesize of output 257 [2025-02-06 04:34:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:44,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271893923] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:44,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:44,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-02-06 04:34:44,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676947258] [2025-02-06 04:34:44,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:44,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:44,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:44,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:44,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:44,778 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:44,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 290 transitions, 4106 flow. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:44,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:44,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:47,207 INFO L124 PetriNetUnfolderBase]: 2826/5339 cut-off events. [2025-02-06 04:34:47,207 INFO L125 PetriNetUnfolderBase]: For 54804/54804 co-relation queries the response was YES. [2025-02-06 04:34:47,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25411 conditions, 5339 events. 2826/5339 cut-off events. For 54804/54804 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37085 event pairs, 1245 based on Foata normal form. 9/5348 useless extension candidates. Maximal degree in co-relation 25352. Up to 2798 conditions per place. [2025-02-06 04:34:47,235 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 287 selfloop transitions, 134 changer transitions 32/454 dead transitions. [2025-02-06 04:34:47,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 454 transitions, 6319 flow [2025-02-06 04:34:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:34:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:34:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 264 transitions. [2025-02-06 04:34:47,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40615384615384614 [2025-02-06 04:34:47,238 INFO L175 Difference]: Start difference. First operand has 200 places, 290 transitions, 4106 flow. Second operand 25 states and 264 transitions. [2025-02-06 04:34:47,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 454 transitions, 6319 flow [2025-02-06 04:34:47,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 454 transitions, 5628 flow, removed 322 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:47,607 INFO L231 Difference]: Finished difference. Result has 229 places, 323 transitions, 4469 flow [2025-02-06 04:34:47,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4469, PETRI_PLACES=229, PETRI_TRANSITIONS=323} [2025-02-06 04:34:47,608 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2025-02-06 04:34:47,608 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 323 transitions, 4469 flow [2025-02-06 04:34:47,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:47,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:47,608 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:47,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:47,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:47,812 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:47,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 150025174, now seen corresponding path program 9 times [2025-02-06 04:34:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061362113] [2025-02-06 04:34:47,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:47,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:47,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:34:47,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:47,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061362113] [2025-02-06 04:34:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061362113] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130467925] [2025-02-06 04:34:48,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:48,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:48,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 04:34:48,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:48,162 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:34:48,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:48,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:48,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:48,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:48,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:48,470 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:34:48,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 19 [2025-02-06 04:34:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:48,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130467925] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:48,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-02-06 04:34:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693777705] [2025-02-06 04:34:48,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:48,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:48,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:48,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:48,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:48,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 323 transitions, 4469 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:48,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:48,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:48,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:49,680 INFO L124 PetriNetUnfolderBase]: 2930/5511 cut-off events. [2025-02-06 04:34:49,680 INFO L125 PetriNetUnfolderBase]: For 38289/38289 co-relation queries the response was YES. [2025-02-06 04:34:49,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24517 conditions, 5511 events. 2930/5511 cut-off events. For 38289/38289 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 38289 event pairs, 403 based on Foata normal form. 21/5532 useless extension candidates. Maximal degree in co-relation 24448. Up to 1154 conditions per place. [2025-02-06 04:34:49,720 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 230 selfloop transitions, 193 changer transitions 11/435 dead transitions. [2025-02-06 04:34:49,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 435 transitions, 6153 flow [2025-02-06 04:34:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:34:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:34:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2025-02-06 04:34:49,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3553113553113553 [2025-02-06 04:34:49,727 INFO L175 Difference]: Start difference. First operand has 229 places, 323 transitions, 4469 flow. Second operand 21 states and 194 transitions. [2025-02-06 04:34:49,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 435 transitions, 6153 flow [2025-02-06 04:34:49,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 435 transitions, 5945 flow, removed 98 selfloop flow, removed 8 redundant places. [2025-02-06 04:34:50,002 INFO L231 Difference]: Finished difference. Result has 240 places, 351 transitions, 5153 flow [2025-02-06 04:34:50,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5153, PETRI_PLACES=240, PETRI_TRANSITIONS=351} [2025-02-06 04:34:50,004 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2025-02-06 04:34:50,004 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 351 transitions, 5153 flow [2025-02-06 04:34:50,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:50,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:50,004 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:50,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 04:34:50,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:50,205 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:50,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash -589990366, now seen corresponding path program 10 times [2025-02-06 04:34:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588006747] [2025-02-06 04:34:50,206 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:50,212 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:34:50,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:50,223 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:50,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588006747] [2025-02-06 04:34:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588006747] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:50,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117757210] [2025-02-06 04:34:50,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:50,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:50,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:50,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 04:34:50,622 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:34:50,644 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:50,644 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:50,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:50,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:34:50,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:50,773 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 91 treesize of output 59 [2025-02-06 04:34:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:50,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:50,931 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:34:50,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 42 [2025-02-06 04:34:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117757210] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:50,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:50,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-02-06 04:34:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894824734] [2025-02-06 04:34:50,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:50,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:34:50,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:50,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:34:50,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:34:50,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:50,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 351 transitions, 5153 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:50,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:50,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:50,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:52,210 INFO L124 PetriNetUnfolderBase]: 2918/5466 cut-off events. [2025-02-06 04:34:52,210 INFO L125 PetriNetUnfolderBase]: For 40074/40074 co-relation queries the response was YES. [2025-02-06 04:34:52,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24816 conditions, 5466 events. 2918/5466 cut-off events. For 40074/40074 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37966 event pairs, 1328 based on Foata normal form. 32/5498 useless extension candidates. Maximal degree in co-relation 24748. Up to 2825 conditions per place. [2025-02-06 04:34:52,242 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 306 selfloop transitions, 92 changer transitions 9/408 dead transitions. [2025-02-06 04:34:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 408 transitions, 6212 flow [2025-02-06 04:34:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:34:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:34:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2025-02-06 04:34:52,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2025-02-06 04:34:52,244 INFO L175 Difference]: Start difference. First operand has 240 places, 351 transitions, 5153 flow. Second operand 12 states and 138 transitions. [2025-02-06 04:34:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 408 transitions, 6212 flow [2025-02-06 04:34:52,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 408 transitions, 5859 flow, removed 83 selfloop flow, removed 15 redundant places. [2025-02-06 04:34:52,524 INFO L231 Difference]: Finished difference. Result has 234 places, 344 transitions, 4934 flow [2025-02-06 04:34:52,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4934, PETRI_PLACES=234, PETRI_TRANSITIONS=344} [2025-02-06 04:34:52,525 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 209 predicate places. [2025-02-06 04:34:52,525 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 344 transitions, 4934 flow [2025-02-06 04:34:52,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:52,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:52,525 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:52,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:52,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-06 04:34:52,726 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:52,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1274068642, now seen corresponding path program 11 times [2025-02-06 04:34:52,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:52,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481548150] [2025-02-06 04:34:52,727 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:52,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:52,732 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:52,742 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:52,743 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:52,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:34:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481548150] [2025-02-06 04:34:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481548150] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653685116] [2025-02-06 04:34:52,986 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:52,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:52,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:52,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 04:34:53,054 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:53,076 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:53,076 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:34:53,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:53,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:34:53,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:53,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:53,312 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:34:53,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 19 [2025-02-06 04:34:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653685116] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:53,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-02-06 04:34:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233174822] [2025-02-06 04:34:53,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:53,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:34:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:53,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:34:53,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:34:53,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:53,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 344 transitions, 4934 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:53,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:53,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:53,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:54,381 INFO L124 PetriNetUnfolderBase]: 3007/5633 cut-off events. [2025-02-06 04:34:54,382 INFO L125 PetriNetUnfolderBase]: For 36891/36891 co-relation queries the response was YES. [2025-02-06 04:34:54,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24637 conditions, 5633 events. 3007/5633 cut-off events. For 36891/36891 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39390 event pairs, 659 based on Foata normal form. 21/5654 useless extension candidates. Maximal degree in co-relation 24578. Up to 2374 conditions per place. [2025-02-06 04:34:54,421 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 322 selfloop transitions, 106 changer transitions 6/435 dead transitions. [2025-02-06 04:34:54,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 435 transitions, 6389 flow [2025-02-06 04:34:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:34:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:34:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2025-02-06 04:34:54,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2025-02-06 04:34:54,422 INFO L175 Difference]: Start difference. First operand has 234 places, 344 transitions, 4934 flow. Second operand 12 states and 145 transitions. [2025-02-06 04:34:54,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 435 transitions, 6389 flow [2025-02-06 04:34:54,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 435 transitions, 6185 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-02-06 04:34:54,659 INFO L231 Difference]: Finished difference. Result has 238 places, 351 transitions, 5125 flow [2025-02-06 04:34:54,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5125, PETRI_PLACES=238, PETRI_TRANSITIONS=351} [2025-02-06 04:34:54,660 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 213 predicate places. [2025-02-06 04:34:54,660 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 351 transitions, 5125 flow [2025-02-06 04:34:54,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:54,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:54,660 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:54,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 04:34:54,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-06 04:34:54,864 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:54,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 809098876, now seen corresponding path program 12 times [2025-02-06 04:34:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630845572] [2025-02-06 04:34:54,867 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:54,876 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:54,888 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:54,888 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:54,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630845572] [2025-02-06 04:34:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630845572] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13507939] [2025-02-06 04:34:55,198 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:55,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:55,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:55,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 04:34:55,262 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:34:55,283 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:55,283 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:55,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:55,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:55,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:55,473 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 37 [2025-02-06 04:34:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:55,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:55,598 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:34:55,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 109 treesize of output 56 [2025-02-06 04:34:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13507939] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:55,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-02-06 04:34:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624122933] [2025-02-06 04:34:55,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:55,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:55,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:55,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:55,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:55,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:55,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 351 transitions, 5125 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:55,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:55,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:55,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:56,954 INFO L124 PetriNetUnfolderBase]: 2842/5347 cut-off events. [2025-02-06 04:34:56,954 INFO L125 PetriNetUnfolderBase]: For 36723/36723 co-relation queries the response was YES. [2025-02-06 04:34:56,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24824 conditions, 5347 events. 2842/5347 cut-off events. For 36723/36723 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37128 event pairs, 754 based on Foata normal form. 12/5359 useless extension candidates. Maximal degree in co-relation 24762. Up to 1452 conditions per place. [2025-02-06 04:34:56,984 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 246 selfloop transitions, 175 changer transitions 19/441 dead transitions. [2025-02-06 04:34:56,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 441 transitions, 6399 flow [2025-02-06 04:34:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 04:34:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 04:34:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 218 transitions. [2025-02-06 04:34:56,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36454849498327757 [2025-02-06 04:34:56,986 INFO L175 Difference]: Start difference. First operand has 238 places, 351 transitions, 5125 flow. Second operand 23 states and 218 transitions. [2025-02-06 04:34:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 441 transitions, 6399 flow [2025-02-06 04:34:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 441 transitions, 6289 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-02-06 04:34:57,189 INFO L231 Difference]: Finished difference. Result has 257 places, 349 transitions, 5330 flow [2025-02-06 04:34:57,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5330, PETRI_PLACES=257, PETRI_TRANSITIONS=349} [2025-02-06 04:34:57,189 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2025-02-06 04:34:57,189 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 349 transitions, 5330 flow [2025-02-06 04:34:57,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:57,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:57,190 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:57,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:57,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 04:34:57,390 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:57,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1464330334, now seen corresponding path program 13 times [2025-02-06 04:34:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828826217] [2025-02-06 04:34:57,391 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:57,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:34:57,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:57,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:57,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828826217] [2025-02-06 04:34:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828826217] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20291345] [2025-02-06 04:34:57,861 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:57,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:57,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:57,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 04:34:57,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:34:57,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:34:57,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:57,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:57,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 04:34:57,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:58,085 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 112 treesize of output 72 [2025-02-06 04:34:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:58,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:58,449 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:34:58,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 19 [2025-02-06 04:34:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20291345] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:58,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:58,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-02-06 04:34:58,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127218916] [2025-02-06 04:34:58,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:58,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:58,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:58,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:58,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:34:58,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 349 transitions, 5330 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:58,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:58,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:34:58,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:00,226 INFO L124 PetriNetUnfolderBase]: 3002/5606 cut-off events. [2025-02-06 04:35:00,226 INFO L125 PetriNetUnfolderBase]: For 43447/43447 co-relation queries the response was YES. [2025-02-06 04:35:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26897 conditions, 5606 events. 3002/5606 cut-off events. For 43447/43447 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 38956 event pairs, 357 based on Foata normal form. 15/5621 useless extension candidates. Maximal degree in co-relation 26833. Up to 1386 conditions per place. [2025-02-06 04:35:00,284 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 264 selfloop transitions, 220 changer transitions 14/499 dead transitions. [2025-02-06 04:35:00,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 499 transitions, 7237 flow [2025-02-06 04:35:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:35:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:35:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 277 transitions. [2025-02-06 04:35:00,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42615384615384616 [2025-02-06 04:35:00,286 INFO L175 Difference]: Start difference. First operand has 257 places, 349 transitions, 5330 flow. Second operand 25 states and 277 transitions. [2025-02-06 04:35:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 499 transitions, 7237 flow [2025-02-06 04:35:00,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 499 transitions, 6858 flow, removed 20 selfloop flow, removed 14 redundant places. [2025-02-06 04:35:00,529 INFO L231 Difference]: Finished difference. Result has 268 places, 370 transitions, 5875 flow [2025-02-06 04:35:00,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5875, PETRI_PLACES=268, PETRI_TRANSITIONS=370} [2025-02-06 04:35:00,530 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2025-02-06 04:35:00,530 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 370 transitions, 5875 flow [2025-02-06 04:35:00,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:00,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:00,531 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:00,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 04:35:00,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-06 04:35:00,732 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:00,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:00,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1583081118, now seen corresponding path program 14 times [2025-02-06 04:35:00,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:00,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127039443] [2025-02-06 04:35:00,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:35:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:00,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:00,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:00,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:35:00,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:01,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:01,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127039443] [2025-02-06 04:35:01,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127039443] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:01,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084864059] [2025-02-06 04:35:01,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:35:01,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:01,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:01,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 04:35:01,133 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:01,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:01,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:35:01,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:01,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:35:01,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:01,418 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 37 [2025-02-06 04:35:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:01,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:01,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:01,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 69 [2025-02-06 04:35:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084864059] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:01,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:01,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-02-06 04:35:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932013366] [2025-02-06 04:35:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:01,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:35:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:01,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:35:01,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:35:01,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:01,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 370 transitions, 5875 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:01,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:01,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:01,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:02,698 INFO L124 PetriNetUnfolderBase]: 2983/5557 cut-off events. [2025-02-06 04:35:02,698 INFO L125 PetriNetUnfolderBase]: For 43756/43756 co-relation queries the response was YES. [2025-02-06 04:35:02,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 5557 events. 2983/5557 cut-off events. For 43756/43756 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 38537 event pairs, 1318 based on Foata normal form. 3/5560 useless extension candidates. Maximal degree in co-relation 27152. Up to 2596 conditions per place. [2025-02-06 04:35:02,731 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 246 selfloop transitions, 146 changer transitions 12/405 dead transitions. [2025-02-06 04:35:02,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 405 transitions, 6772 flow [2025-02-06 04:35:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:35:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:35:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 119 transitions. [2025-02-06 04:35:02,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3520710059171598 [2025-02-06 04:35:02,732 INFO L175 Difference]: Start difference. First operand has 268 places, 370 transitions, 5875 flow. Second operand 13 states and 119 transitions. [2025-02-06 04:35:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 405 transitions, 6772 flow [2025-02-06 04:35:03,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 405 transitions, 6507 flow, removed 47 selfloop flow, removed 14 redundant places. [2025-02-06 04:35:03,071 INFO L231 Difference]: Finished difference. Result has 265 places, 363 transitions, 5796 flow [2025-02-06 04:35:03,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5796, PETRI_PLACES=265, PETRI_TRANSITIONS=363} [2025-02-06 04:35:03,071 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 240 predicate places. [2025-02-06 04:35:03,072 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 363 transitions, 5796 flow [2025-02-06 04:35:03,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:03,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:03,072 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:03,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:03,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:03,272 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:03,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash 948281940, now seen corresponding path program 15 times [2025-02-06 04:35:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986817000] [2025-02-06 04:35:03,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:03,278 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:03,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:03,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:03,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986817000] [2025-02-06 04:35:03,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986817000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:03,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818693911] [2025-02-06 04:35:03,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:03,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:03,546 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:03,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 04:35:03,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:03,632 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:03,632 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:03,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:03,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:35:03,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:03,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:04,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:04,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 27 [2025-02-06 04:35:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818693911] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:04,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:04,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2025-02-06 04:35:04,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873588193] [2025-02-06 04:35:04,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:04,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:35:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:04,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:35:04,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:35:04,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:04,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 363 transitions, 5796 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:04,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:04,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:04,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:05,548 INFO L124 PetriNetUnfolderBase]: 3053/5666 cut-off events. [2025-02-06 04:35:05,548 INFO L125 PetriNetUnfolderBase]: For 46661/46661 co-relation queries the response was YES. [2025-02-06 04:35:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27699 conditions, 5666 events. 3053/5666 cut-off events. For 46661/46661 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 39257 event pairs, 1136 based on Foata normal form. 24/5690 useless extension candidates. Maximal degree in co-relation 27631. Up to 2513 conditions per place. [2025-02-06 04:35:05,588 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 214 selfloop transitions, 217 changer transitions 7/439 dead transitions. [2025-02-06 04:35:05,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 439 transitions, 7068 flow [2025-02-06 04:35:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 04:35:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 04:35:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 192 transitions. [2025-02-06 04:35:05,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3356643356643357 [2025-02-06 04:35:05,590 INFO L175 Difference]: Start difference. First operand has 265 places, 363 transitions, 5796 flow. Second operand 22 states and 192 transitions. [2025-02-06 04:35:05,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 439 transitions, 7068 flow [2025-02-06 04:35:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 439 transitions, 6751 flow, removed 16 selfloop flow, removed 10 redundant places. [2025-02-06 04:35:05,930 INFO L231 Difference]: Finished difference. Result has 273 places, 369 transitions, 6022 flow [2025-02-06 04:35:05,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6022, PETRI_PLACES=273, PETRI_TRANSITIONS=369} [2025-02-06 04:35:05,934 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2025-02-06 04:35:05,934 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 369 transitions, 6022 flow [2025-02-06 04:35:05,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:05,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:05,934 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:05,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 04:35:06,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:06,134 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:06,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 413409454, now seen corresponding path program 16 times [2025-02-06 04:35:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:06,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953942528] [2025-02-06 04:35:06,135 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:06,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:06,141 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:06,148 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:06,148 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:06,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953942528] [2025-02-06 04:35:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953942528] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:35:06,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:35:06,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 04:35:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620820642] [2025-02-06 04:35:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:35:06,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 04:35:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:06,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 04:35:06,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-06 04:35:06,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:06,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 369 transitions, 6022 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:06,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:06,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:06,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:07,291 INFO L124 PetriNetUnfolderBase]: 3178/5896 cut-off events. [2025-02-06 04:35:07,292 INFO L125 PetriNetUnfolderBase]: For 49679/49679 co-relation queries the response was YES. [2025-02-06 04:35:07,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29077 conditions, 5896 events. 3178/5896 cut-off events. For 49679/49679 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41411 event pairs, 1994 based on Foata normal form. 18/5914 useless extension candidates. Maximal degree in co-relation 29008. Up to 4718 conditions per place. [2025-02-06 04:35:07,330 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 346 selfloop transitions, 65 changer transitions 5/417 dead transitions. [2025-02-06 04:35:07,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 417 transitions, 7300 flow [2025-02-06 04:35:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:35:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:35:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2025-02-06 04:35:07,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2025-02-06 04:35:07,331 INFO L175 Difference]: Start difference. First operand has 273 places, 369 transitions, 6022 flow. Second operand 9 states and 95 transitions. [2025-02-06 04:35:07,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 417 transitions, 7300 flow [2025-02-06 04:35:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 417 transitions, 7159 flow, removed 20 selfloop flow, removed 11 redundant places. [2025-02-06 04:35:07,655 INFO L231 Difference]: Finished difference. Result has 272 places, 377 transitions, 6214 flow [2025-02-06 04:35:07,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6214, PETRI_PLACES=272, PETRI_TRANSITIONS=377} [2025-02-06 04:35:07,655 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 247 predicate places. [2025-02-06 04:35:07,656 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 377 transitions, 6214 flow [2025-02-06 04:35:07,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:07,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:07,658 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:07,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-02-06 04:35:07,659 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:07,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash -392829830, now seen corresponding path program 17 times [2025-02-06 04:35:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:07,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156482429] [2025-02-06 04:35:07,660 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:07,670 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:07,683 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:07,684 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:35:07,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:35:07,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156482429] [2025-02-06 04:35:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156482429] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683577379] [2025-02-06 04:35:07,927 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:07,929 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:07,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 04:35:07,996 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:08,016 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:08,016 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:35:08,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:08,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 04:35:08,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:08,069 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 91 treesize of output 59 [2025-02-06 04:35:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:08,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:08,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:08,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 47 [2025-02-06 04:35:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683577379] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:08,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:08,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-02-06 04:35:08,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655412600] [2025-02-06 04:35:08,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:08,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:35:08,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:08,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:35:08,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:35:08,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:08,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 377 transitions, 6214 flow. Second operand has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:08,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:08,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:09,305 INFO L124 PetriNetUnfolderBase]: 3194/5909 cut-off events. [2025-02-06 04:35:09,305 INFO L125 PetriNetUnfolderBase]: For 52121/52121 co-relation queries the response was YES. [2025-02-06 04:35:09,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29407 conditions, 5909 events. 3194/5909 cut-off events. For 52121/52121 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41530 event pairs, 1598 based on Foata normal form. 27/5936 useless extension candidates. Maximal degree in co-relation 29336. Up to 4059 conditions per place. [2025-02-06 04:35:09,346 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 276 selfloop transitions, 139 changer transitions 6/422 dead transitions. [2025-02-06 04:35:09,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 422 transitions, 7218 flow [2025-02-06 04:35:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:35:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:35:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2025-02-06 04:35:09,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4198717948717949 [2025-02-06 04:35:09,347 INFO L175 Difference]: Start difference. First operand has 272 places, 377 transitions, 6214 flow. Second operand 12 states and 131 transitions. [2025-02-06 04:35:09,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 422 transitions, 7218 flow [2025-02-06 04:35:09,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 422 transitions, 7092 flow, removed 15 selfloop flow, removed 6 redundant places. [2025-02-06 04:35:09,679 INFO L231 Difference]: Finished difference. Result has 279 places, 374 transitions, 6490 flow [2025-02-06 04:35:09,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6490, PETRI_PLACES=279, PETRI_TRANSITIONS=374} [2025-02-06 04:35:09,680 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2025-02-06 04:35:09,680 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 374 transitions, 6490 flow [2025-02-06 04:35:09,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:09,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:09,680 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:09,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:09,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:09,884 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:09,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -839570062, now seen corresponding path program 18 times [2025-02-06 04:35:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:09,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010683052] [2025-02-06 04:35:09,884 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:35:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:09,890 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:09,905 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:09,905 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:35:09,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:10,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010683052] [2025-02-06 04:35:10,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010683052] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:10,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512802847] [2025-02-06 04:35:10,204 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:35:10,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:10,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:10,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:10,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 04:35:10,275 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:10,296 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:10,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:35:10,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:10,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 04:35:10,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:10,313 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 15 treesize of output 1 [2025-02-06 04:35:10,325 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 19 treesize of output 1 [2025-02-06 04:35:10,337 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 19 treesize of output 1 [2025-02-06 04:35:10,472 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 91 treesize of output 59 [2025-02-06 04:35:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:35:10,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:10,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512802847] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:10,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:10,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 23 [2025-02-06 04:35:10,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274116665] [2025-02-06 04:35:10,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:10,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:35:10,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:10,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:35:10,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:35:10,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:10,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 374 transitions, 6490 flow. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:10,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:10,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:10,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:11,879 INFO L124 PetriNetUnfolderBase]: 3183/5883 cut-off events. [2025-02-06 04:35:11,879 INFO L125 PetriNetUnfolderBase]: For 56109/56109 co-relation queries the response was YES. [2025-02-06 04:35:11,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30117 conditions, 5883 events. 3183/5883 cut-off events. For 56109/56109 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41216 event pairs, 2122 based on Foata normal form. 6/5889 useless extension candidates. Maximal degree in co-relation 30044. Up to 5090 conditions per place. [2025-02-06 04:35:11,910 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 345 selfloop transitions, 51 changer transitions 12/409 dead transitions. [2025-02-06 04:35:11,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 409 transitions, 7437 flow [2025-02-06 04:35:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:35:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:35:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2025-02-06 04:35:11,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33727810650887574 [2025-02-06 04:35:11,912 INFO L175 Difference]: Start difference. First operand has 279 places, 374 transitions, 6490 flow. Second operand 13 states and 114 transitions. [2025-02-06 04:35:11,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 409 transitions, 7437 flow [2025-02-06 04:35:12,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 409 transitions, 7373 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-02-06 04:35:12,243 INFO L231 Difference]: Finished difference. Result has 284 places, 370 transitions, 6440 flow [2025-02-06 04:35:12,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6440, PETRI_PLACES=284, PETRI_TRANSITIONS=370} [2025-02-06 04:35:12,244 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-02-06 04:35:12,244 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 370 transitions, 6440 flow [2025-02-06 04:35:12,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:12,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:12,245 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:12,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 04:35:12,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-02-06 04:35:12,449 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:12,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1753170578, now seen corresponding path program 19 times [2025-02-06 04:35:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:12,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342237717] [2025-02-06 04:35:12,450 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:35:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:12,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:35:12,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:12,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:35:12,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342237717] [2025-02-06 04:35:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342237717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642636052] [2025-02-06 04:35:12,703 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:35:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:12,705 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:12,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 04:35:12,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:35:12,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:12,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:35:12,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:12,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 04:35:12,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:12,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:13,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:13,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 27 [2025-02-06 04:35:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:13,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642636052] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:13,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:13,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2025-02-06 04:35:13,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311963039] [2025-02-06 04:35:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:13,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:35:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:13,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:35:13,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:35:13,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:13,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 370 transitions, 6440 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:13,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:13,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:13,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:14,628 INFO L124 PetriNetUnfolderBase]: 3189/5882 cut-off events. [2025-02-06 04:35:14,628 INFO L125 PetriNetUnfolderBase]: For 57136/57136 co-relation queries the response was YES. [2025-02-06 04:35:14,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30157 conditions, 5882 events. 3189/5882 cut-off events. For 57136/57136 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41089 event pairs, 1884 based on Foata normal form. 16/5898 useless extension candidates. Maximal degree in co-relation 30083. Up to 4542 conditions per place. [2025-02-06 04:35:14,678 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 297 selfloop transitions, 121 changer transitions 7/426 dead transitions. [2025-02-06 04:35:14,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 426 transitions, 7542 flow [2025-02-06 04:35:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:35:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:35:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 152 transitions. [2025-02-06 04:35:14,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2025-02-06 04:35:14,679 INFO L175 Difference]: Start difference. First operand has 284 places, 370 transitions, 6440 flow. Second operand 16 states and 152 transitions. [2025-02-06 04:35:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 426 transitions, 7542 flow [2025-02-06 04:35:15,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 7313 flow, removed 12 selfloop flow, removed 14 redundant places. [2025-02-06 04:35:15,052 INFO L231 Difference]: Finished difference. Result has 284 places, 371 transitions, 6490 flow [2025-02-06 04:35:15,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6490, PETRI_PLACES=284, PETRI_TRANSITIONS=371} [2025-02-06 04:35:15,053 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-02-06 04:35:15,053 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 371 transitions, 6490 flow [2025-02-06 04:35:15,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:15,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:15,053 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:15,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:15,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-02-06 04:35:15,257 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:15,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash 947920726, now seen corresponding path program 20 times [2025-02-06 04:35:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640047227] [2025-02-06 04:35:15,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:35:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:15,263 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:15,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:15,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:35:15,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640047227] [2025-02-06 04:35:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640047227] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:35:15,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:35:15,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 04:35:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738413128] [2025-02-06 04:35:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:35:15,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 04:35:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:15,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 04:35:15,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 04:35:15,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:15,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 371 transitions, 6490 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:15,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:15,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:15,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:16,707 INFO L124 PetriNetUnfolderBase]: 3446/6328 cut-off events. [2025-02-06 04:35:16,708 INFO L125 PetriNetUnfolderBase]: For 61909/61909 co-relation queries the response was YES. [2025-02-06 04:35:16,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32384 conditions, 6328 events. 3446/6328 cut-off events. For 61909/61909 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 44842 event pairs, 2240 based on Foata normal form. 2/6330 useless extension candidates. Maximal degree in co-relation 32311. Up to 5218 conditions per place. [2025-02-06 04:35:16,751 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 352 selfloop transitions, 62 changer transitions 7/422 dead transitions. [2025-02-06 04:35:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 422 transitions, 7940 flow [2025-02-06 04:35:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:35:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:35:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2025-02-06 04:35:16,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36752136752136755 [2025-02-06 04:35:16,752 INFO L175 Difference]: Start difference. First operand has 284 places, 371 transitions, 6490 flow. Second operand 9 states and 86 transitions. [2025-02-06 04:35:16,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 422 transitions, 7940 flow [2025-02-06 04:35:17,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 422 transitions, 7854 flow, removed 10 selfloop flow, removed 10 redundant places. [2025-02-06 04:35:17,151 INFO L231 Difference]: Finished difference. Result has 284 places, 386 transitions, 6874 flow [2025-02-06 04:35:17,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6383, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6874, PETRI_PLACES=284, PETRI_TRANSITIONS=386} [2025-02-06 04:35:17,152 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-02-06 04:35:17,152 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 386 transitions, 6874 flow [2025-02-06 04:35:17,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:17,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:17,152 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:17,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-06 04:35:17,152 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:17,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1587755908, now seen corresponding path program 21 times [2025-02-06 04:35:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050324698] [2025-02-06 04:35:17,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:17,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:17,167 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:17,167 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:17,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:17,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:17,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050324698] [2025-02-06 04:35:17,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050324698] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:17,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821856934] [2025-02-06 04:35:17,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:17,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:17,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:17,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-06 04:35:17,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:17,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:17,524 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:17,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:17,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:35:17,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:17,654 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 91 treesize of output 59 [2025-02-06 04:35:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:17,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:17,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:17,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 30 [2025-02-06 04:35:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:17,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821856934] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:17,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:17,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2025-02-06 04:35:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772442425] [2025-02-06 04:35:17,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:17,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:35:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:17,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:35:17,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:35:17,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:17,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 386 transitions, 6874 flow. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:17,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:17,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:17,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:19,070 INFO L124 PetriNetUnfolderBase]: 3411/6263 cut-off events. [2025-02-06 04:35:19,071 INFO L125 PetriNetUnfolderBase]: For 63953/63953 co-relation queries the response was YES. [2025-02-06 04:35:19,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33771 conditions, 6263 events. 3411/6263 cut-off events. For 63953/63953 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44014 event pairs, 1446 based on Foata normal form. 2/6265 useless extension candidates. Maximal degree in co-relation 33697. Up to 3185 conditions per place. [2025-02-06 04:35:19,112 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 268 selfloop transitions, 167 changer transitions 15/451 dead transitions. [2025-02-06 04:35:19,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 451 transitions, 8142 flow [2025-02-06 04:35:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 04:35:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 04:35:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 163 transitions. [2025-02-06 04:35:19,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3482905982905983 [2025-02-06 04:35:19,113 INFO L175 Difference]: Start difference. First operand has 284 places, 386 transitions, 6874 flow. Second operand 18 states and 163 transitions. [2025-02-06 04:35:19,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 451 transitions, 8142 flow [2025-02-06 04:35:19,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 8008 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-02-06 04:35:19,521 INFO L231 Difference]: Finished difference. Result has 298 places, 391 transitions, 7192 flow [2025-02-06 04:35:19,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7192, PETRI_PLACES=298, PETRI_TRANSITIONS=391} [2025-02-06 04:35:19,522 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 273 predicate places. [2025-02-06 04:35:19,522 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 391 transitions, 7192 flow [2025-02-06 04:35:19,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:19,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:19,522 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:19,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-06 04:35:19,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-02-06 04:35:19,723 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:19,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1384210962, now seen corresponding path program 22 times [2025-02-06 04:35:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319987487] [2025-02-06 04:35:19,723 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:19,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:19,729 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:19,736 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:19,736 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:19,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319987487] [2025-02-06 04:35:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319987487] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700833865] [2025-02-06 04:35:20,084 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:20,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:20,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-06 04:35:20,167 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:20,195 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:20,195 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:20,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:20,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:35:20,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:20,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:20,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:20,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 27 [2025-02-06 04:35:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700833865] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:20,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:20,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-02-06 04:35:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878178796] [2025-02-06 04:35:20,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:20,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:35:20,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:20,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:35:20,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:35:20,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:20,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 391 transitions, 7192 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:20,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:21,659 INFO L124 PetriNetUnfolderBase]: 3443/6291 cut-off events. [2025-02-06 04:35:21,659 INFO L125 PetriNetUnfolderBase]: For 76448/76448 co-relation queries the response was YES. [2025-02-06 04:35:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36032 conditions, 6291 events. 3443/6291 cut-off events. For 76448/76448 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44173 event pairs, 2224 based on Foata normal form. 24/6315 useless extension candidates. Maximal degree in co-relation 35954. Up to 5289 conditions per place. [2025-02-06 04:35:21,702 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 373 selfloop transitions, 50 changer transitions 5/429 dead transitions. [2025-02-06 04:35:21,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 429 transitions, 8393 flow [2025-02-06 04:35:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:35:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:35:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2025-02-06 04:35:21,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-02-06 04:35:21,703 INFO L175 Difference]: Start difference. First operand has 298 places, 391 transitions, 7192 flow. Second operand 9 states and 91 transitions. [2025-02-06 04:35:21,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 429 transitions, 8393 flow [2025-02-06 04:35:22,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 429 transitions, 8292 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-02-06 04:35:22,184 INFO L231 Difference]: Finished difference. Result has 295 places, 394 transitions, 7286 flow [2025-02-06 04:35:22,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7286, PETRI_PLACES=295, PETRI_TRANSITIONS=394} [2025-02-06 04:35:22,185 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 270 predicate places. [2025-02-06 04:35:22,185 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 394 transitions, 7286 flow [2025-02-06 04:35:22,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:22,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:22,186 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:22,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:22,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-02-06 04:35:22,387 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:22,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 345252636, now seen corresponding path program 23 times [2025-02-06 04:35:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195778630] [2025-02-06 04:35:22,387 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:22,393 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:22,398 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:22,398 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:35:22,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:22,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:22,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195778630] [2025-02-06 04:35:22,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195778630] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:22,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107345185] [2025-02-06 04:35:22,533 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:22,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:22,535 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:22,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-06 04:35:22,616 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:22,636 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:22,636 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:35:22,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:22,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 04:35:22,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:22,742 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 112 treesize of output 72 [2025-02-06 04:35:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:22,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:22,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:22,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 47 [2025-02-06 04:35:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107345185] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:22,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:22,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 04:35:22,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347337114] [2025-02-06 04:35:22,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:22,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 04:35:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:22,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 04:35:22,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-02-06 04:35:22,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:22,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 394 transitions, 7286 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:22,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:22,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:22,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:23,818 INFO L124 PetriNetUnfolderBase]: 3456/6295 cut-off events. [2025-02-06 04:35:23,819 INFO L125 PetriNetUnfolderBase]: For 77468/77468 co-relation queries the response was YES. [2025-02-06 04:35:23,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36241 conditions, 6295 events. 3456/6295 cut-off events. For 77468/77468 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44018 event pairs, 2190 based on Foata normal form. 27/6322 useless extension candidates. Maximal degree in co-relation 36163. Up to 5154 conditions per place. [2025-02-06 04:35:23,867 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 365 selfloop transitions, 53 changer transitions 4/423 dead transitions. [2025-02-06 04:35:23,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 423 transitions, 8345 flow [2025-02-06 04:35:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 04:35:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 04:35:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2025-02-06 04:35:23,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2025-02-06 04:35:23,868 INFO L175 Difference]: Start difference. First operand has 295 places, 394 transitions, 7286 flow. Second operand 7 states and 83 transitions. [2025-02-06 04:35:23,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 423 transitions, 8345 flow [2025-02-06 04:35:24,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 423 transitions, 8207 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-02-06 04:35:24,317 INFO L231 Difference]: Finished difference. Result has 292 places, 389 transitions, 7208 flow [2025-02-06 04:35:24,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7208, PETRI_PLACES=292, PETRI_TRANSITIONS=389} [2025-02-06 04:35:24,317 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2025-02-06 04:35:24,317 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 389 transitions, 7208 flow [2025-02-06 04:35:24,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:24,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:24,318 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:24,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 04:35:24,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-02-06 04:35:24,519 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:24,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1772454774, now seen corresponding path program 24 times [2025-02-06 04:35:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133317637] [2025-02-06 04:35:24,519 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:35:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:24,527 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:24,542 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:24,542 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:35:24,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133317637] [2025-02-06 04:35:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133317637] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196018613] [2025-02-06 04:35:24,822 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:35:24,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:24,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:24,824 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:24,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-06 04:35:24,902 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:24,923 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:24,923 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:35:24,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:24,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:35:24,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:25,309 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 91 treesize of output 59 [2025-02-06 04:35:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:25,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:25,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:25,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 69 [2025-02-06 04:35:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196018613] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:25,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2025-02-06 04:35:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632854091] [2025-02-06 04:35:25,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:25,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:35:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:25,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:35:25,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:35:25,567 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:25,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 389 transitions, 7208 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:25,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:25,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:25,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:26,916 INFO L124 PetriNetUnfolderBase]: 3471/6301 cut-off events. [2025-02-06 04:35:26,916 INFO L125 PetriNetUnfolderBase]: For 76977/76977 co-relation queries the response was YES. [2025-02-06 04:35:26,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36337 conditions, 6301 events. 3471/6301 cut-off events. For 76977/76977 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43927 event pairs, 907 based on Foata normal form. 21/6322 useless extension candidates. Maximal degree in co-relation 36261. Up to 2361 conditions per place. [2025-02-06 04:35:26,969 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 283 selfloop transitions, 231 changer transitions 6/521 dead transitions. [2025-02-06 04:35:26,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 521 transitions, 9718 flow [2025-02-06 04:35:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:35:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:35:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 185 transitions. [2025-02-06 04:35:26,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37449392712550605 [2025-02-06 04:35:26,969 INFO L175 Difference]: Start difference. First operand has 292 places, 389 transitions, 7208 flow. Second operand 19 states and 185 transitions. [2025-02-06 04:35:26,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 521 transitions, 9718 flow [2025-02-06 04:35:27,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 521 transitions, 9559 flow, removed 29 selfloop flow, removed 9 redundant places. [2025-02-06 04:35:27,435 INFO L231 Difference]: Finished difference. Result has 303 places, 426 transitions, 8570 flow [2025-02-06 04:35:27,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8570, PETRI_PLACES=303, PETRI_TRANSITIONS=426} [2025-02-06 04:35:27,436 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2025-02-06 04:35:27,436 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 426 transitions, 8570 flow [2025-02-06 04:35:27,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:27,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:27,436 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:27,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:27,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-02-06 04:35:27,636 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:27,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1542192074, now seen corresponding path program 25 times [2025-02-06 04:35:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363838275] [2025-02-06 04:35:27,637 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:35:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:27,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:35:27,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:27,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:35:27,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:27,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363838275] [2025-02-06 04:35:27,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363838275] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530010038] [2025-02-06 04:35:27,913 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:35:27,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:27,916 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:27,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-06 04:35:27,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:35:28,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:28,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:35:28,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:28,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 04:35:28,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:28,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:28,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:28,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 27 [2025-02-06 04:35:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:28,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530010038] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:28,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:28,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-02-06 04:35:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185378057] [2025-02-06 04:35:28,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:28,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:35:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:28,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:35:28,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:35:28,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 426 transitions, 8570 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:28,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:28,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:29,564 INFO L124 PetriNetUnfolderBase]: 3270/6007 cut-off events. [2025-02-06 04:35:29,564 INFO L125 PetriNetUnfolderBase]: For 97001/97001 co-relation queries the response was YES. [2025-02-06 04:35:29,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38601 conditions, 6007 events. 3270/6007 cut-off events. For 97001/97001 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42146 event pairs, 1605 based on Foata normal form. 18/6025 useless extension candidates. Maximal degree in co-relation 38523. Up to 4711 conditions per place. [2025-02-06 04:35:29,609 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 354 selfloop transitions, 123 changer transitions 4/482 dead transitions. [2025-02-06 04:35:29,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 482 transitions, 9975 flow [2025-02-06 04:35:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 04:35:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 04:35:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2025-02-06 04:35:29,610 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2025-02-06 04:35:29,610 INFO L175 Difference]: Start difference. First operand has 303 places, 426 transitions, 8570 flow. Second operand 15 states and 144 transitions. [2025-02-06 04:35:29,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 482 transitions, 9975 flow [2025-02-06 04:35:30,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 482 transitions, 9761 flow, removed 79 selfloop flow, removed 8 redundant places. [2025-02-06 04:35:30,158 INFO L231 Difference]: Finished difference. Result has 312 places, 429 transitions, 8721 flow [2025-02-06 04:35:30,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8721, PETRI_PLACES=312, PETRI_TRANSITIONS=429} [2025-02-06 04:35:30,159 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2025-02-06 04:35:30,159 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 429 transitions, 8721 flow [2025-02-06 04:35:30,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:30,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:30,159 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:30,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-06 04:35:30,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2025-02-06 04:35:30,364 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:30,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1521275408, now seen corresponding path program 26 times [2025-02-06 04:35:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864920195] [2025-02-06 04:35:30,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:35:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:30,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:30,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:30,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:35:30,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864920195] [2025-02-06 04:35:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864920195] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420747930] [2025-02-06 04:35:30,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:35:30,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:30,655 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:30,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-06 04:35:30,733 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:30,754 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:30,754 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:35:30,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:30,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:35:30,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:31,070 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 82 treesize of output 50 [2025-02-06 04:35:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:31,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:31,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:31,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 55 [2025-02-06 04:35:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420747930] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:31,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:31,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2025-02-06 04:35:31,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360764281] [2025-02-06 04:35:31,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:31,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:35:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:31,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:35:31,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:35:31,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:31,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 429 transitions, 8721 flow. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:31,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:31,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:31,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:32,610 INFO L124 PetriNetUnfolderBase]: 3271/6014 cut-off events. [2025-02-06 04:35:32,610 INFO L125 PetriNetUnfolderBase]: For 88546/88546 co-relation queries the response was YES. [2025-02-06 04:35:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 6014 events. 3271/6014 cut-off events. For 88546/88546 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 42136 event pairs, 902 based on Foata normal form. 2/6016 useless extension candidates. Maximal degree in co-relation 36810. Up to 1938 conditions per place. [2025-02-06 04:35:32,647 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 280 selfloop transitions, 230 changer transitions 9/520 dead transitions. [2025-02-06 04:35:32,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 520 transitions, 10590 flow [2025-02-06 04:35:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:35:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:35:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2025-02-06 04:35:32,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3319838056680162 [2025-02-06 04:35:32,649 INFO L175 Difference]: Start difference. First operand has 312 places, 429 transitions, 8721 flow. Second operand 19 states and 164 transitions. [2025-02-06 04:35:32,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 520 transitions, 10590 flow [2025-02-06 04:35:33,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 520 transitions, 10469 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-02-06 04:35:33,070 INFO L231 Difference]: Finished difference. Result has 322 places, 438 transitions, 9189 flow [2025-02-06 04:35:33,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8610, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9189, PETRI_PLACES=322, PETRI_TRANSITIONS=438} [2025-02-06 04:35:33,071 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2025-02-06 04:35:33,071 INFO L471 AbstractCegarLoop]: Abstraction has has 322 places, 438 transitions, 9189 flow [2025-02-06 04:35:33,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:33,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:33,072 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:33,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:33,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:33,274 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:33,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1939305296, now seen corresponding path program 27 times [2025-02-06 04:35:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:33,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313634123] [2025-02-06 04:35:33,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:33,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:33,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:33,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:33,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:33,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313634123] [2025-02-06 04:35:33,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313634123] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023718563] [2025-02-06 04:35:33,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:35:33,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:33,512 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:33,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-06 04:35:33,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-06 04:35:33,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-06 04:35:33,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:35:33,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:33,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 04:35:33,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:33,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:33,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:33,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 28 [2025-02-06 04:35:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023718563] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:33,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-02-06 04:35:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232289784] [2025-02-06 04:35:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:33,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:35:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:33,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:35:33,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:35:33,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 438 transitions, 9189 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:33,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:35,295 INFO L124 PetriNetUnfolderBase]: 3338/6111 cut-off events. [2025-02-06 04:35:35,295 INFO L125 PetriNetUnfolderBase]: For 96494/96494 co-relation queries the response was YES. [2025-02-06 04:35:35,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38776 conditions, 6111 events. 3338/6111 cut-off events. For 96494/96494 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42584 event pairs, 407 based on Foata normal form. 20/6131 useless extension candidates. Maximal degree in co-relation 38698. Up to 2367 conditions per place. [2025-02-06 04:35:35,337 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 315 selfloop transitions, 208 changer transitions 3/527 dead transitions. [2025-02-06 04:35:35,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 527 transitions, 11105 flow [2025-02-06 04:35:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 04:35:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 04:35:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 167 transitions. [2025-02-06 04:35:35,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35683760683760685 [2025-02-06 04:35:35,339 INFO L175 Difference]: Start difference. First operand has 322 places, 438 transitions, 9189 flow. Second operand 18 states and 167 transitions. [2025-02-06 04:35:35,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 527 transitions, 11105 flow [2025-02-06 04:35:35,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 527 transitions, 10645 flow, removed 13 selfloop flow, removed 10 redundant places. [2025-02-06 04:35:35,827 INFO L231 Difference]: Finished difference. Result has 331 places, 452 transitions, 9502 flow [2025-02-06 04:35:35,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9502, PETRI_PLACES=331, PETRI_TRANSITIONS=452} [2025-02-06 04:35:35,827 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 306 predicate places. [2025-02-06 04:35:35,827 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 452 transitions, 9502 flow [2025-02-06 04:35:35,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:35,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:35,828 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:35,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-06 04:35:36,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:36,032 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:35:36,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash -378453768, now seen corresponding path program 28 times [2025-02-06 04:35:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349380132] [2025-02-06 04:35:36,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:36,038 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:36,044 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:36,045 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:36,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349380132] [2025-02-06 04:35:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349380132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880376128] [2025-02-06 04:35:36,400 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:36,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:36,401 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:35:36,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-06 04:35:36,479 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:35:36,499 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:35:36,499 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:36,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:36,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:35:36,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:36,684 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 82 treesize of output 50 [2025-02-06 04:35:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:36,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:36,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:35:36,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 61 [2025-02-06 04:35:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880376128] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:36,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:36,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-02-06 04:35:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266844294] [2025-02-06 04:35:36,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:36,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:35:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:36,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:35:36,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:35:36,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-02-06 04:35:36,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 452 transitions, 9502 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:36,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:36,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-02-06 04:35:36,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand