./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --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/pthread-C-DAC/pthread-demo-datarace-1.i -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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:28:04,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:28:04,882 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:28:04,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:28:04,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:28:04,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:28:04,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:28:04,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:28:04,920 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:28:04,920 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:28:04,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:28:04,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:28:04,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:28:04,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:28:04,922 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:28:04,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:28:04,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:28:04,923 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:28:04,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:28:04,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:28:04,924 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:28:04,925 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:28:04,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:28:04,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:28:04,925 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 -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2025-02-06 04:28:05,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:28:05,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:28:05,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:28:05,232 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:28:05,232 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:28:05,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2025-02-06 04:28:06,488 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6447aff1e/24b7ac16fcd04ab6bcaef2a5ca16d468/FLAG876591538 [2025-02-06 04:28:06,837 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:28:06,838 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2025-02-06 04:28:06,851 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6447aff1e/24b7ac16fcd04ab6bcaef2a5ca16d468/FLAG876591538 [2025-02-06 04:28:06,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6447aff1e/24b7ac16fcd04ab6bcaef2a5ca16d468 [2025-02-06 04:28:06,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:28:06,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:28:06,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:28:06,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:28:06,874 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:28:06,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:28:06" (1/1) ... [2025-02-06 04:28:06,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22da2d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:06, skipping insertion in model container [2025-02-06 04:28:06,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:28:06" (1/1) ... [2025-02-06 04:28:06,920 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:28:07,090 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/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-02-06 04:28:07,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:28:07,406 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:28:07,417 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/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-02-06 04:28:07,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:28:07,550 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:28:07,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07 WrapperNode [2025-02-06 04:28:07,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:28:07,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:28:07,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:28:07,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:28:07,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,596 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2025-02-06 04:28:07,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:28:07,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:28:07,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:28:07,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:28:07,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,608 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,623 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2025-02-06 04:28:07,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,627 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:28:07,633 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:28:07,633 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:28:07,633 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:28:07,634 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (1/1) ... [2025-02-06 04:28:07,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:28:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:07,663 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 04:28:07,666 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 04:28:07,687 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2025-02-06 04:28:07,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:28:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:28:07,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:28:07,690 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 04:28:07,811 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:28:07,813 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:28:07,946 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:28:07,947 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:28:08,036 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:28:08,036 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:28:08,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:28:08 BoogieIcfgContainer [2025-02-06 04:28:08,037 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:28:08,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:28:08,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:28:08,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:28:08,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:28:06" (1/3) ... [2025-02-06 04:28:08,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bc24e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:28:08, skipping insertion in model container [2025-02-06 04:28:08,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:28:07" (2/3) ... [2025-02-06 04:28:08,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bc24e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:28:08, skipping insertion in model container [2025-02-06 04:28:08,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:28:08" (3/3) ... [2025-02-06 04:28:08,046 INFO L128 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2025-02-06 04:28:08,059 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:28:08,061 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pthread-demo-datarace-1.i that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-06 04:28:08,061 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:28:08,100 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-02-06 04:28:08,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2025-02-06 04:28:08,161 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2025-02-06 04:28:08,163 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:28:08,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-02-06 04:28:08,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2025-02-06 04:28:08,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2025-02-06 04:28:08,181 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:28:08,194 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;@31dc2e75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:28:08,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-06 04:28:08,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:28:08,209 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-02-06 04:28:08,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:28:08,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:08,210 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:08,211 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:08,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash -222683499, now seen corresponding path program 1 times [2025-02-06 04:28:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:08,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821026063] [2025-02-06 04:28:08,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:28:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:08,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 04:28:08,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 04:28:08,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:28:08,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:08,396 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 04:28:08,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:08,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821026063] [2025-02-06 04:28:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821026063] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:28:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:28:08,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:28:08,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505994106] [2025-02-06 04:28:08,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:28:08,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:28:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:08,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:28:08,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:28:08,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-02-06 04:28:08,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 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 04:28:08,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:08,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-02-06 04:28:08,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:08,538 INFO L124 PetriNetUnfolderBase]: 61/134 cut-off events. [2025-02-06 04:28:08,538 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:28:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 134 events. 61/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 403 event pairs, 27 based on Foata normal form. 6/139 useless extension candidates. Maximal degree in co-relation 248. Up to 77 conditions per place. [2025-02-06 04:28:08,541 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2025-02-06 04:28:08,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2025-02-06 04:28:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:28:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:28:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-02-06 04:28:08,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 04:28:08,554 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2025-02-06 04:28:08,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2025-02-06 04:28:08,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:28:08,561 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2025-02-06 04:28:08,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2025-02-06 04:28:08,567 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2025-02-06 04:28:08,568 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2025-02-06 04:28:08,568 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 04:28:08,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:08,569 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:08,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:28:08,569 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:08,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1023612825, now seen corresponding path program 1 times [2025-02-06 04:28:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135714428] [2025-02-06 04:28:08,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:28:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:08,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:28:08,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:28:08,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:28:08,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:28:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135714428] [2025-02-06 04:28:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135714428] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:28:08,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:28:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:28:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725690833] [2025-02-06 04:28:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:28:08,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:28:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:08,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:28:08,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:28:08,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-02-06 04:28:08,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 04:28:08,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:08,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-02-06 04:28:08,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:08,767 INFO L124 PetriNetUnfolderBase]: 91/208 cut-off events. [2025-02-06 04:28:08,767 INFO L125 PetriNetUnfolderBase]: For 35/36 co-relation queries the response was YES. [2025-02-06 04:28:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 208 events. 91/208 cut-off events. For 35/36 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 747 event pairs, 46 based on Foata normal form. 9/216 useless extension candidates. Maximal degree in co-relation 123. Up to 113 conditions per place. [2025-02-06 04:28:08,770 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2025-02-06 04:28:08,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 134 flow [2025-02-06 04:28:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:28:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:28:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-02-06 04:28:08,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-02-06 04:28:08,773 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 46 transitions. [2025-02-06 04:28:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 134 flow [2025-02-06 04:28:08,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:28:08,775 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2025-02-06 04:28:08,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, 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=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2025-02-06 04:28:08,776 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2025-02-06 04:28:08,777 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2025-02-06 04:28:08,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 04:28:08,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:08,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:08,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:28:08,777 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:08,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash 608513951, now seen corresponding path program 1 times [2025-02-06 04:28:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:08,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434547571] [2025-02-06 04:28:08,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:28:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:08,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 04:28:08,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:28:08,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:28:08,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:08,947 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 04:28:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434547571] [2025-02-06 04:28:08,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434547571] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:28:08,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:28:08,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:28:08,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150488530] [2025-02-06 04:28:08,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:28:08,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:28:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:08,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:28:08,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:28:08,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-02-06 04:28:08,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 04:28:08,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:08,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-02-06 04:28:08,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:09,032 INFO L124 PetriNetUnfolderBase]: 59/153 cut-off events. [2025-02-06 04:28:09,032 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2025-02-06 04:28:09,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 153 events. 59/153 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 458 event pairs, 20 based on Foata normal form. 16/168 useless extension candidates. Maximal degree in co-relation 117. Up to 72 conditions per place. [2025-02-06 04:28:09,035 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 20 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2025-02-06 04:28:09,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 142 flow [2025-02-06 04:28:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:28:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:28:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2025-02-06 04:28:09,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-02-06 04:28:09,038 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 43 transitions. [2025-02-06 04:28:09,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 142 flow [2025-02-06 04:28:09,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:28:09,039 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2025-02-06 04:28:09,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-02-06 04:28:09,041 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2025-02-06 04:28:09,041 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2025-02-06 04:28:09,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 04:28:09,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:09,042 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:09,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:28:09,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:09,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1494191151, now seen corresponding path program 2 times [2025-02-06 04:28:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384519333] [2025-02-06 04:28:09,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:28:09,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:09,054 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-02-06 04:28:09,063 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:28:09,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:28:09,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:09,124 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 04:28:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384519333] [2025-02-06 04:28:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384519333] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:28:09,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:28:09,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:28:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470308682] [2025-02-06 04:28:09,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:28:09,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:28:09,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:09,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:28:09,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:28:09,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-02-06 04:28:09,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 04:28:09,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:09,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-02-06 04:28:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:09,237 INFO L124 PetriNetUnfolderBase]: 79/214 cut-off events. [2025-02-06 04:28:09,237 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-06 04:28:09,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 79/214 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 719 event pairs, 20 based on Foata normal form. 9/223 useless extension candidates. Maximal degree in co-relation 183. Up to 89 conditions per place. [2025-02-06 04:28:09,238 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 33 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2025-02-06 04:28:09,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 210 flow [2025-02-06 04:28:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:28:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:28:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-02-06 04:28:09,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-02-06 04:28:09,242 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 4 states and 62 transitions. [2025-02-06 04:28:09,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 210 flow [2025-02-06 04:28:09,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:28:09,246 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 82 flow [2025-02-06 04:28:09,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2025-02-06 04:28:09,247 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2025-02-06 04:28:09,247 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 82 flow [2025-02-06 04:28:09,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 04:28:09,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:09,248 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:09,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:28:09,248 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:09,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1637952877, now seen corresponding path program 3 times [2025-02-06 04:28:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606263075] [2025-02-06 04:28:09,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:28:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:09,266 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-06 04:28:09,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 25 statements. [2025-02-06 04:28:09,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:28:09,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 04:28:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606263075] [2025-02-06 04:28:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606263075] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:28:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:28:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:28:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239655280] [2025-02-06 04:28:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:28:09,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:28:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:09,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:28:09,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:28:09,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-02-06 04:28:09,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:28:09,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:09,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-02-06 04:28:09,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:09,440 INFO L124 PetriNetUnfolderBase]: 125/328 cut-off events. [2025-02-06 04:28:09,441 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2025-02-06 04:28:09,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 328 events. 125/328 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1280 event pairs, 35 based on Foata normal form. 14/341 useless extension candidates. Maximal degree in co-relation 269. Up to 137 conditions per place. [2025-02-06 04:28:09,444 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 39 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2025-02-06 04:28:09,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 266 flow [2025-02-06 04:28:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:28:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:28:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-02-06 04:28:09,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-02-06 04:28:09,446 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 82 flow. Second operand 4 states and 61 transitions. [2025-02-06 04:28:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 266 flow [2025-02-06 04:28:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 04:28:09,448 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 92 flow [2025-02-06 04:28:09,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2025-02-06 04:28:09,451 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2025-02-06 04:28:09,453 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 92 flow [2025-02-06 04:28:09,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:28:09,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:09,454 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:09,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:28:09,454 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:09,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash 552269435, now seen corresponding path program 4 times [2025-02-06 04:28:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:09,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707027888] [2025-02-06 04:28:09,455 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:28:09,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:09,473 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 04:28:09,489 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:28:09,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:28:09,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 04:28:09,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707027888] [2025-02-06 04:28:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707027888] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:09,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729117551] [2025-02-06 04:28:09,579 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:28:09,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:09,581 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 04:28:09,583 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 04:28:09,644 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 04:28:09,671 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:28:09,671 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:28:09,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:09,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 04:28:09,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 04:28:09,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 04:28:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729117551] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:09,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-06 04:28:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858507983] [2025-02-06 04:28:09,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:09,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:28:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:09,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:28:09,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:28:09,806 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-06 04:28:09,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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 04:28:09,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:09,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-06 04:28:09,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:10,002 INFO L124 PetriNetUnfolderBase]: 319/730 cut-off events. [2025-02-06 04:28:10,002 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2025-02-06 04:28:10,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 730 events. 319/730 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2842 event pairs, 35 based on Foata normal form. 56/786 useless extension candidates. Maximal degree in co-relation 775. Up to 132 conditions per place. [2025-02-06 04:28:10,007 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 85 selfloop transitions, 8 changer transitions 0/96 dead transitions. [2025-02-06 04:28:10,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 96 transitions, 552 flow [2025-02-06 04:28:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:28:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:28:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-02-06 04:28:10,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2025-02-06 04:28:10,010 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 92 flow. Second operand 8 states and 123 transitions. [2025-02-06 04:28:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 96 transitions, 552 flow [2025-02-06 04:28:10,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 96 transitions, 546 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:28:10,014 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 144 flow [2025-02-06 04:28:10,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=144, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2025-02-06 04:28:10,015 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2025-02-06 04:28:10,016 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 144 flow [2025-02-06 04:28:10,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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 04:28:10,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:10,017 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:10,025 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 04:28:10,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:10,221 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:10,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -84126669, now seen corresponding path program 5 times [2025-02-06 04:28:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139590682] [2025-02-06 04:28:10,222 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:28:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:10,242 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 6 equivalence classes. [2025-02-06 04:28:10,260 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-02-06 04:28:10,260 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 04:28:10,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:28:10,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139590682] [2025-02-06 04:28:10,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139590682] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147957095] [2025-02-06 04:28:10,428 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:28:10,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:10,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:10,431 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 04:28:10,433 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 04:28:10,499 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 6 equivalence classes. [2025-02-06 04:28:10,538 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-02-06 04:28:10,538 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 04:28:10,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:10,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 04:28:10,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:28:10,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:28:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147957095] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:10,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:10,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-02-06 04:28:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247581079] [2025-02-06 04:28:10,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:10,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 04:28:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:10,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 04:28:10,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-02-06 04:28:10,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-06 04:28:10,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 144 flow. Second operand has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 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 04:28:10,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:10,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-06 04:28:10,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:11,224 INFO L124 PetriNetUnfolderBase]: 687/1551 cut-off events. [2025-02-06 04:28:11,224 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2025-02-06 04:28:11,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5143 conditions, 1551 events. 687/1551 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6377 event pairs, 20 based on Foata normal form. 112/1663 useless extension candidates. Maximal degree in co-relation 2297. Up to 292 conditions per place. [2025-02-06 04:28:11,234 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 181 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2025-02-06 04:28:11,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 200 transitions, 1266 flow [2025-02-06 04:28:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:28:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:28:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 255 transitions. [2025-02-06 04:28:11,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6640625 [2025-02-06 04:28:11,238 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 144 flow. Second operand 16 states and 255 transitions. [2025-02-06 04:28:11,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 200 transitions, 1266 flow [2025-02-06 04:28:11,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 200 transitions, 1214 flow, removed 24 selfloop flow, removed 2 redundant places. [2025-02-06 04:28:11,249 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 248 flow [2025-02-06 04:28:11,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=248, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2025-02-06 04:28:11,250 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2025-02-06 04:28:11,250 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 248 flow [2025-02-06 04:28:11,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 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 04:28:11,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:11,250 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:11,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 04:28:11,455 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 04:28:11,455 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:11,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 723058707, now seen corresponding path program 6 times [2025-02-06 04:28:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:11,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468458769] [2025-02-06 04:28:11,456 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:28:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:11,477 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 15 equivalence classes. [2025-02-06 04:28:11,487 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 90 statements. [2025-02-06 04:28:11,487 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:28:11,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-02-06 04:28:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468458769] [2025-02-06 04:28:11,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468458769] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098056896] [2025-02-06 04:28:11,544 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:28:11,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:11,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:11,547 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 04:28:11,550 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 04:28:11,628 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 15 equivalence classes. [2025-02-06 04:28:11,651 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 90 statements. [2025-02-06 04:28:11,651 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:28:11,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:11,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 04:28:11,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-02-06 04:28:11,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-02-06 04:28:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098056896] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:11,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-06 04:28:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813143037] [2025-02-06 04:28:11,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:11,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 04:28:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:11,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 04:28:11,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-06 04:28:11,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-02-06 04:28:11,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 248 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 04:28:11,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:11,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-02-06 04:28:11,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:12,318 INFO L124 PetriNetUnfolderBase]: 1213/2834 cut-off events. [2025-02-06 04:28:12,318 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2025-02-06 04:28:12,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 2834 events. 1213/2834 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 15236 event pairs, 86 based on Foata normal form. 232/3065 useless extension candidates. Maximal degree in co-relation 7862. Up to 495 conditions per place. [2025-02-06 04:28:12,335 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 155 selfloop transitions, 8 changer transitions 0/169 dead transitions. [2025-02-06 04:28:12,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 169 transitions, 1520 flow [2025-02-06 04:28:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:28:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:28:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2025-02-06 04:28:12,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-02-06 04:28:12,336 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 248 flow. Second operand 8 states and 124 transitions. [2025-02-06 04:28:12,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 169 transitions, 1520 flow [2025-02-06 04:28:12,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 169 transitions, 1450 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 04:28:12,347 INFO L231 Difference]: Finished difference. Result has 70 places, 41 transitions, 296 flow [2025-02-06 04:28:12,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=41} [2025-02-06 04:28:12,348 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 48 predicate places. [2025-02-06 04:28:12,348 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 296 flow [2025-02-06 04:28:12,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 04:28:12,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:12,348 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:12,358 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 04:28:12,549 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 04:28:12,549 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:12,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 535130835, now seen corresponding path program 7 times [2025-02-06 04:28:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:12,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668464272] [2025-02-06 04:28:12,550 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:28:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:12,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-02-06 04:28:12,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-02-06 04:28:12,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:28:12,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2025-02-06 04:28:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668464272] [2025-02-06 04:28:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668464272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573203479] [2025-02-06 04:28:12,868 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:28:12,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:12,870 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 04:28:12,872 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 04:28:12,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-02-06 04:28:13,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-02-06 04:28:13,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:28:13,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:13,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 04:28:13,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2025-02-06 04:28:13,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2025-02-06 04:28:13,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573203479] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:13,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:13,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-06 04:28:13,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655245182] [2025-02-06 04:28:13,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:13,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:28:13,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:13,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:28:13,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:28:13,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-02-06 04:28:13,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 41 transitions, 296 flow. Second operand has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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 04:28:13,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:13,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-02-06 04:28:13,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:14,286 INFO L124 PetriNetUnfolderBase]: 2601/6155 cut-off events. [2025-02-06 04:28:14,286 INFO L125 PetriNetUnfolderBase]: For 17634/17634 co-relation queries the response was YES. [2025-02-06 04:28:14,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22174 conditions, 6155 events. 2601/6155 cut-off events. For 17634/17634 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 37143 event pairs, 156 based on Foata normal form. 464/6619 useless extension candidates. Maximal degree in co-relation 19749. Up to 1095 conditions per place. [2025-02-06 04:28:14,332 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 331 selfloop transitions, 16 changer transitions 0/353 dead transitions. [2025-02-06 04:28:14,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 353 transitions, 3146 flow [2025-02-06 04:28:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:28:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:28:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 256 transitions. [2025-02-06 04:28:14,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-02-06 04:28:14,334 INFO L175 Difference]: Start difference. First operand has 70 places, 41 transitions, 296 flow. Second operand 16 states and 256 transitions. [2025-02-06 04:28:14,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 353 transitions, 3146 flow [2025-02-06 04:28:14,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 353 transitions, 3094 flow, removed 24 selfloop flow, removed 2 redundant places. [2025-02-06 04:28:14,364 INFO L231 Difference]: Finished difference. Result has 92 places, 50 transitions, 400 flow [2025-02-06 04:28:14,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=400, PETRI_PLACES=92, PETRI_TRANSITIONS=50} [2025-02-06 04:28:14,366 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2025-02-06 04:28:14,366 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 50 transitions, 400 flow [2025-02-06 04:28:14,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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 04:28:14,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:14,366 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:14,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 04:28:14,567 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 04:28:14,567 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:14,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:14,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1037880519, now seen corresponding path program 8 times [2025-02-06 04:28:14,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:14,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218398966] [2025-02-06 04:28:14,569 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:28:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:14,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 150 statements into 2 equivalence classes. [2025-02-06 04:28:14,629 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 150 of 150 statements. [2025-02-06 04:28:14,629 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:28:14,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2025-02-06 04:28:15,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:15,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218398966] [2025-02-06 04:28:15,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218398966] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:15,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677211677] [2025-02-06 04:28:15,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:28:15,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:15,171 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 04:28:15,174 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 04:28:15,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 150 statements into 2 equivalence classes. [2025-02-06 04:28:15,358 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 150 of 150 statements. [2025-02-06 04:28:15,359 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:28:15,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:15,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 04:28:15,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2025-02-06 04:28:15,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2025-02-06 04:28:16,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677211677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:16,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:16,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2025-02-06 04:28:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735717756] [2025-02-06 04:28:16,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:16,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-06 04:28:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:16,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-06 04:28:16,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 04:28:16,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-06 04:28:16,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 50 transitions, 400 flow. Second operand has 37 states, 37 states have (on average 10.0) internal successors, (370), 37 states have internal predecessors, (370), 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 04:28:16,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:16,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-06 04:28:16,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:30,427 INFO L124 PetriNetUnfolderBase]: 4239/9994 cut-off events. [2025-02-06 04:28:30,427 INFO L125 PetriNetUnfolderBase]: For 78324/78324 co-relation queries the response was YES. [2025-02-06 04:28:30,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39261 conditions, 9994 events. 4239/9994 cut-off events. For 78324/78324 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 62855 event pairs, 8 based on Foata normal form. 499/10493 useless extension candidates. Maximal degree in co-relation 29557. Up to 1751 conditions per place. [2025-02-06 04:28:30,508 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2350 selfloop transitions, 688 changer transitions 0/3043 dead transitions. [2025-02-06 04:28:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 3043 transitions, 21274 flow [2025-02-06 04:28:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2025-02-06 04:28:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2025-02-06 04:28:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 4840 transitions. [2025-02-06 04:28:30,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984174085064293 [2025-02-06 04:28:30,523 INFO L175 Difference]: Start difference. First operand has 92 places, 50 transitions, 400 flow. Second operand 337 states and 4840 transitions. [2025-02-06 04:28:30,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 3043 transitions, 21274 flow [2025-02-06 04:28:30,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 3043 transitions, 21114 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 04:28:30,623 INFO L231 Difference]: Finished difference. Result has 549 places, 729 transitions, 8630 flow [2025-02-06 04:28:30,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=8630, PETRI_PLACES=549, PETRI_TRANSITIONS=729} [2025-02-06 04:28:30,624 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 527 predicate places. [2025-02-06 04:28:30,624 INFO L471 AbstractCegarLoop]: Abstraction has has 549 places, 729 transitions, 8630 flow [2025-02-06 04:28:30,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.0) internal successors, (370), 37 states have internal predecessors, (370), 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 04:28:30,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:30,625 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:30,633 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 04:28:30,825 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,SelfDestructingSolverStorable9 [2025-02-06 04:28:30,825 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:30,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2140990763, now seen corresponding path program 9 times [2025-02-06 04:28:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:30,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277669633] [2025-02-06 04:28:30,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:28:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:30,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 21 equivalence classes. [2025-02-06 04:28:30,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 160 of 185 statements. [2025-02-06 04:28:30,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-02-06 04:28:30,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-02-06 04:28:31,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:31,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277669633] [2025-02-06 04:28:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277669633] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:31,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996709155] [2025-02-06 04:28:31,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:28:31,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:31,486 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 04:28:31,488 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 04:28:31,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 21 equivalence classes. [2025-02-06 04:28:31,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 160 of 185 statements. [2025-02-06 04:28:31,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-02-06 04:28:31,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:31,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 04:28:31,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-02-06 04:28:31,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-02-06 04:28:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996709155] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:32,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:32,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2025-02-06 04:28:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276173911] [2025-02-06 04:28:32,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:32,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:28:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:32,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:28:32,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:28:32,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-06 04:28:32,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 729 transitions, 8630 flow. Second operand has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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 04:28:32,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:32,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-06 04:28:32,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:36,087 INFO L124 PetriNetUnfolderBase]: 5329/12538 cut-off events. [2025-02-06 04:28:36,087 INFO L125 PetriNetUnfolderBase]: For 969240/969240 co-relation queries the response was YES. [2025-02-06 04:28:36,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67259 conditions, 12538 events. 5329/12538 cut-off events. For 969240/969240 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 82766 event pairs, 326 based on Foata normal form. 415/12934 useless extension candidates. Maximal degree in co-relation 62539. Up to 2163 conditions per place. [2025-02-06 04:28:36,230 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1073 dead transitions. [2025-02-06 04:28:36,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1073 transitions, 17850 flow [2025-02-06 04:28:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 04:28:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 04:28:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 348 transitions. [2025-02-06 04:28:36,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2025-02-06 04:28:36,232 INFO L175 Difference]: Start difference. First operand has 549 places, 729 transitions, 8630 flow. Second operand 22 states and 348 transitions. [2025-02-06 04:28:36,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1073 transitions, 17850 flow [2025-02-06 04:28:38,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1073 transitions, 16758 flow, removed 0 selfloop flow, removed 26 redundant places. [2025-02-06 04:28:38,040 INFO L231 Difference]: Finished difference. Result has 550 places, 814 transitions, 9836 flow [2025-02-06 04:28:38,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7668, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9836, PETRI_PLACES=550, PETRI_TRANSITIONS=814} [2025-02-06 04:28:38,042 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2025-02-06 04:28:38,042 INFO L471 AbstractCegarLoop]: Abstraction has has 550 places, 814 transitions, 9836 flow [2025-02-06 04:28:38,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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 04:28:38,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:28:38,042 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:28:38,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 04:28:38,243 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,SelfDestructingSolverStorable10 [2025-02-06 04:28:38,243 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:28:38,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:28:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1406944891, now seen corresponding path program 10 times [2025-02-06 04:28:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:28:38,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990926422] [2025-02-06 04:28:38,245 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:28:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:28:38,273 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-02-06 04:28:38,340 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-02-06 04:28:38,340 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:28:38,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:28:41,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:28:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990926422] [2025-02-06 04:28:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990926422] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:28:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254277477] [2025-02-06 04:28:41,324 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:28:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:28:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:28:41,326 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 04:28:41,327 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 04:28:41,451 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-02-06 04:28:41,598 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-02-06 04:28:41,598 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:28:41,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:28:41,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-02-06 04:28:41,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:28:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:28:41,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:28:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:28:42,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254277477] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:28:42,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:28:42,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2025-02-06 04:28:42,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457310660] [2025-02-06 04:28:42,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:28:42,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-02-06 04:28:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:28:42,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-02-06 04:28:42,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2025-02-06 04:28:42,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-06 04:28:42,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 814 transitions, 9836 flow. Second operand has 45 states, 45 states have (on average 8.777777777777779) internal successors, (395), 45 states have internal predecessors, (395), 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 04:28:42,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:28:42,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-06 04:28:42,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:28:55,982 INFO L124 PetriNetUnfolderBase]: 8401/22291 cut-off events. [2025-02-06 04:28:55,983 INFO L125 PetriNetUnfolderBase]: For 6054402/6054422 co-relation queries the response was YES. [2025-02-06 04:28:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213859 conditions, 22291 events. 8401/22291 cut-off events. For 6054402/6054422 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 176767 event pairs, 1183 based on Foata normal form. 1/22257 useless extension candidates. Maximal degree in co-relation 205094. Up to 4068 conditions per place. [2025-02-06 04:28:56,357 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2983 selfloop transitions, 83 changer transitions 2/3093 dead transitions. [2025-02-06 04:28:56,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 3093 transitions, 46093 flow [2025-02-06 04:28:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-06 04:28:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-02-06 04:28:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 666 transitions. [2025-02-06 04:28:56,359 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2025-02-06 04:28:56,359 INFO L175 Difference]: Start difference. First operand has 550 places, 814 transitions, 9836 flow. Second operand 44 states and 666 transitions. [2025-02-06 04:28:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 3093 transitions, 46093 flow