./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:34:06,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:34:06,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:34:06,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:34:06,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:34:06,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:34:06,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:34:06,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:34:06,773 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:34:06,773 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:34:06,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:34:06,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:34:06,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:34:06,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:34:06,773 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:34:06,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:34:06,774 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:34:06,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:34:06,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:34:06,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:34:06,775 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 -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2025-02-06 04:34:06,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:34:06,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:34:06,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:34:06,967 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:34:06,967 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:34:06,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2025-02-06 04:34:08,142 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/98a6599af/48af17b3be5e4c648a7c67cfe7bc8b3b/FLAG34352010d [2025-02-06 04:34:08,470 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:34:08,471 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2025-02-06 04:34:08,486 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/98a6599af/48af17b3be5e4c648a7c67cfe7bc8b3b/FLAG34352010d [2025-02-06 04:34:08,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/98a6599af/48af17b3be5e4c648a7c67cfe7bc8b3b [2025-02-06 04:34:08,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:34:08,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:34:08,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:34:08,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:34:08,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:34:08,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:34:08" (1/1) ... [2025-02-06 04:34:08,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b8d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:08, skipping insertion in model container [2025-02-06 04:34:08,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:34:08" (1/1) ... [2025-02-06 04:34:08,796 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:34:08,986 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2025-02-06 04:34:08,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:34:08,998 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:34:09,015 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2025-02-06 04:34:09,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:34:09,027 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:34:09,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09 WrapperNode [2025-02-06 04:34:09,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:34:09,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:34:09,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:34:09,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:34:09,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,055 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 298 [2025-02-06 04:34:09,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:34:09,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:34:09,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:34:09,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:34:09,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,074 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 04:34:09,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,074 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,079 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:34:09,084 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:34:09,084 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:34:09,084 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:34:09,085 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (1/1) ... [2025-02-06 04:34:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:34:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:09,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:34:09,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:34:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:34:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 04:34:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:34:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:34:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:34:09,134 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:34:09,204 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:34:09,205 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:34:09,633 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:34:09,634 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:34:09,966 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:34:09,967 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:34:09,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:34:09 BoogieIcfgContainer [2025-02-06 04:34:09,967 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:34:09,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:34:09,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:34:09,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:34:09,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:34:08" (1/3) ... [2025-02-06 04:34:09,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5422753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:34:09, skipping insertion in model container [2025-02-06 04:34:09,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:34:09" (2/3) ... [2025-02-06 04:34:09,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5422753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:34:09, skipping insertion in model container [2025-02-06 04:34:09,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:34:09" (3/3) ... [2025-02-06 04:34:09,974 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2025-02-06 04:34:09,984 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:34:09,986 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-trans.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-06 04:34:09,986 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:34:10,028 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 04:34:10,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2025-02-06 04:34:10,067 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2025-02-06 04:34:10,068 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:34:10,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-02-06 04:34:10,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2025-02-06 04:34:10,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2025-02-06 04:34:10,077 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:34:10,084 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;@2635b84b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:34:10,084 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-06 04:34:10,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:34:10,096 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2025-02-06 04:34:10,096 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:34:10,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:10,097 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:10,097 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:10,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash 504047835, now seen corresponding path program 1 times [2025-02-06 04:34:10,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565313946] [2025-02-06 04:34:10,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 04:34:10,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 04:34:10,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565313946] [2025-02-06 04:34:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565313946] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:34:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036668568] [2025-02-06 04:34:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:10,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:34:10,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:10,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:34:10,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:34:10,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:10,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:10,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:10,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:10,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:10,475 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2025-02-06 04:34:10,475 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-02-06 04:34:10,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3723 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2025-02-06 04:34:10,482 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2025-02-06 04:34:10,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2025-02-06 04:34:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 04:34:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 04:34:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2025-02-06 04:34:10,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-02-06 04:34:10,491 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2025-02-06 04:34:10,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2025-02-06 04:34:10,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 04:34:10,496 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2025-02-06 04:34:10,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2025-02-06 04:34:10,499 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2025-02-06 04:34:10,499 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2025-02-06 04:34:10,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:10,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:10,500 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:10,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:34:10,500 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:10,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1546506045, now seen corresponding path program 1 times [2025-02-06 04:34:10,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183257832] [2025-02-06 04:34:10,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:34:10,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:34:10,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:10,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183257832] [2025-02-06 04:34:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183257832] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:34:10,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775341040] [2025-02-06 04:34:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:10,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:34:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:10,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:34:10,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:34:10,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:10,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 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 04:34:10,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:10,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:10,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:10,825 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2025-02-06 04:34:10,826 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-06 04:34:10,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3723 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2025-02-06 04:34:10,831 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2025-02-06 04:34:10,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2025-02-06 04:34:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:34:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:34:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2025-02-06 04:34:10,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-02-06 04:34:10,832 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2025-02-06 04:34:10,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2025-02-06 04:34:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:34:10,834 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2025-02-06 04:34:10,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2025-02-06 04:34:10,835 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2025-02-06 04:34:10,835 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2025-02-06 04:34:10,835 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 04:34:10,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:10,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:10,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:34:10,836 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:10,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1433334371, now seen corresponding path program 1 times [2025-02-06 04:34:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618302890] [2025-02-06 04:34:10,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 04:34:10,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 04:34:10,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:10,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618302890] [2025-02-06 04:34:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618302890] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436652790] [2025-02-06 04:34:10,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:10,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:11,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:34:11,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 04:34:11,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 04:34:11,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:11,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:34:11,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:11,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436652790] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:11,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-06 04:34:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212392281] [2025-02-06 04:34:11,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:34:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:34:11,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:34:11,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:11,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:11,313 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2025-02-06 04:34:11,313 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-06 04:34:11,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3723 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2025-02-06 04:34:11,319 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-02-06 04:34:11,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2025-02-06 04:34:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:34:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:34:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-02-06 04:34:11,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2025-02-06 04:34:11,320 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2025-02-06 04:34:11,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2025-02-06 04:34:11,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:11,321 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2025-02-06 04:34:11,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2025-02-06 04:34:11,322 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2025-02-06 04:34:11,322 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2025-02-06 04:34:11,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:11,323 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:11,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:34:11,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:11,528 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:11,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1797439901, now seen corresponding path program 2 times [2025-02-06 04:34:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:11,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192720606] [2025-02-06 04:34:11,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:11,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:11,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 28 statements. [2025-02-06 04:34:11,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:34:11,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192720606] [2025-02-06 04:34:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192720606] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:11,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:34:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818691093] [2025-02-06 04:34:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:34:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:34:11,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:34:11,931 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:11,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:11,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,192 INFO L124 PetriNetUnfolderBase]: 1435/2062 cut-off events. [2025-02-06 04:34:12,192 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 04:34:12,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2062 events. 1435/2062 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8231 event pairs, 608 based on Foata normal form. 1/1719 useless extension candidates. Maximal degree in co-relation 4192. Up to 1140 conditions per place. [2025-02-06 04:34:12,200 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2025-02-06 04:34:12,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 315 flow [2025-02-06 04:34:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:34:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:34:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2025-02-06 04:34:12,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2025-02-06 04:34:12,201 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 4 states and 82 transitions. [2025-02-06 04:34:12,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 315 flow [2025-02-06 04:34:12,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 305 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 04:34:12,203 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2025-02-06 04:34:12,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2025-02-06 04:34:12,204 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2025-02-06 04:34:12,204 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2025-02-06 04:34:12,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,204 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:34:12,204 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:12,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 173083580, now seen corresponding path program 1 times [2025-02-06 04:34:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79240036] [2025-02-06 04:34:12,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:34:12,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:34:12,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:12,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,424 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 04:34:12,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79240036] [2025-02-06 04:34:12,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79240036] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:34:12,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:34:12,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:34:12,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638188624] [2025-02-06 04:34:12,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:34:12,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:34:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:12,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:34:12,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:34:12,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:12,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:12,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:12,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:12,797 INFO L124 PetriNetUnfolderBase]: 2206/3150 cut-off events. [2025-02-06 04:34:12,797 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2025-02-06 04:34:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 3150 events. 2206/3150 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13258 event pairs, 983 based on Foata normal form. 1/2794 useless extension candidates. Maximal degree in co-relation 6940. Up to 1767 conditions per place. [2025-02-06 04:34:12,823 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 47 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2025-02-06 04:34:12,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 336 flow [2025-02-06 04:34:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:34:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:34:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2025-02-06 04:34:12,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-02-06 04:34:12,827 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 4 states and 79 transitions. [2025-02-06 04:34:12,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 336 flow [2025-02-06 04:34:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 328 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:34:12,829 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 112 flow [2025-02-06 04:34:12,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2025-02-06 04:34:12,829 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2025-02-06 04:34:12,829 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 112 flow [2025-02-06 04:34:12,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,830 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:34:12,830 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:12,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1887097071, now seen corresponding path program 1 times [2025-02-06 04:34:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114826576] [2025-02-06 04:34:12,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 04:34:12,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:34:12,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:12,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:14,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114826576] [2025-02-06 04:34:14,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114826576] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575705052] [2025-02-06 04:34:14,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:34:14,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:14,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:14,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:14,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:34:14,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 04:34:14,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:34:14,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:14,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:14,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:34:14,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 101 [2025-02-06 04:34:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:15,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:16,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:16,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 103 [2025-02-06 04:34:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575705052] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:16,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:16,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 31 [2025-02-06 04:34:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215058020] [2025-02-06 04:34:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:16,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-06 04:34:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:16,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-06 04:34:16,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2025-02-06 04:34:16,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:16,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 112 flow. Second operand has 31 states, 31 states have (on average 6.741935483870968) internal successors, (209), 31 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:16,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:16,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:26,173 INFO L124 PetriNetUnfolderBase]: 11881/17127 cut-off events. [2025-02-06 04:34:26,174 INFO L125 PetriNetUnfolderBase]: For 3620/3620 co-relation queries the response was YES. [2025-02-06 04:34:26,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 17127 events. 11881/17127 cut-off events. For 3620/3620 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96844 event pairs, 622 based on Foata normal form. 12/16153 useless extension candidates. Maximal degree in co-relation 39557. Up to 2089 conditions per place. [2025-02-06 04:34:26,251 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 572 selfloop transitions, 154 changer transitions 102/829 dead transitions. [2025-02-06 04:34:26,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 829 transitions, 3821 flow [2025-02-06 04:34:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-02-06 04:34:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2025-02-06 04:34:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1116 transitions. [2025-02-06 04:34:26,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43661971830985913 [2025-02-06 04:34:26,256 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 112 flow. Second operand 71 states and 1116 transitions. [2025-02-06 04:34:26,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 829 transitions, 3821 flow [2025-02-06 04:34:26,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 829 transitions, 3762 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-02-06 04:34:26,269 INFO L231 Difference]: Finished difference. Result has 156 places, 190 transitions, 1303 flow [2025-02-06 04:34:26,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1303, PETRI_PLACES=156, PETRI_TRANSITIONS=190} [2025-02-06 04:34:26,270 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 121 predicate places. [2025-02-06 04:34:26,270 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 190 transitions, 1303 flow [2025-02-06 04:34:26,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.741935483870968) internal successors, (209), 31 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:26,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:26,271 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:26,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 04:34:26,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:26,472 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:26,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1496926249, now seen corresponding path program 2 times [2025-02-06 04:34:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128397527] [2025-02-06 04:34:26,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:26,488 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:34:26,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:34:26,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:26,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:27,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:27,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128397527] [2025-02-06 04:34:27,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128397527] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:27,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768225838] [2025-02-06 04:34:27,097 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:27,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:27,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:27,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:27,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:34:27,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:34:27,191 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:34:27,191 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:27,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:27,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 04:34:27,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:27,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-06 04:34:27,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:34:27,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:34:27,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-02-06 04:34:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:27,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768225838] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:28,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 10] total 28 [2025-02-06 04:34:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979818399] [2025-02-06 04:34:28,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:28,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 04:34:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:28,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 04:34:28,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2025-02-06 04:34:28,457 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:28,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 190 transitions, 1303 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:28,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:28,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:28,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:34,835 INFO L124 PetriNetUnfolderBase]: 18479/27035 cut-off events. [2025-02-06 04:34:34,836 INFO L125 PetriNetUnfolderBase]: For 599503/599503 co-relation queries the response was YES. [2025-02-06 04:34:34,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133627 conditions, 27035 events. 18479/27035 cut-off events. For 599503/599503 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 168657 event pairs, 3675 based on Foata normal form. 5/27040 useless extension candidates. Maximal degree in co-relation 133572. Up to 7100 conditions per place. [2025-02-06 04:34:35,020 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 375 selfloop transitions, 265 changer transitions 68/709 dead transitions. [2025-02-06 04:34:35,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 709 transitions, 7197 flow [2025-02-06 04:34:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-06 04:34:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-02-06 04:34:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 588 transitions. [2025-02-06 04:34:35,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2025-02-06 04:34:35,026 INFO L175 Difference]: Start difference. First operand has 156 places, 190 transitions, 1303 flow. Second operand 41 states and 588 transitions. [2025-02-06 04:34:35,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 709 transitions, 7197 flow [2025-02-06 04:34:37,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 709 transitions, 6454 flow, removed 334 selfloop flow, removed 16 redundant places. [2025-02-06 04:34:37,051 INFO L231 Difference]: Finished difference. Result has 192 places, 366 transitions, 3757 flow [2025-02-06 04:34:37,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3757, PETRI_PLACES=192, PETRI_TRANSITIONS=366} [2025-02-06 04:34:37,052 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 157 predicate places. [2025-02-06 04:34:37,052 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 366 transitions, 3757 flow [2025-02-06 04:34:37,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:37,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:37,052 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:37,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 04:34:37,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:37,253 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:34:37,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash -670750879, now seen corresponding path program 3 times [2025-02-06 04:34:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:37,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139468941] [2025-02-06 04:34:37,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:37,262 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-02-06 04:34:37,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 32 statements. [2025-02-06 04:34:37,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:37,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:37,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139468941] [2025-02-06 04:34:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139468941] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499176874] [2025-02-06 04:34:37,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:37,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:37,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:37,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:34:37,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-02-06 04:34:37,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 32 statements. [2025-02-06 04:34:37,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:37,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:37,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:34:37,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:38,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2025-02-06 04:34:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:38,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:39,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:39,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 121 [2025-02-06 04:34:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499176874] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:39,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2025-02-06 04:34:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156181542] [2025-02-06 04:34:39,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:39,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 04:34:39,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:39,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 04:34:39,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2025-02-06 04:34:39,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:34:39,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 366 transitions, 3757 flow. Second operand has 26 states, 26 states have (on average 7.038461538461538) internal successors, (183), 26 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:39,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:39,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:34:39,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:49,235 INFO L124 PetriNetUnfolderBase]: 31590/46356 cut-off events. [2025-02-06 04:34:49,235 INFO L125 PetriNetUnfolderBase]: For 1493326/1493326 co-relation queries the response was YES. [2025-02-06 04:34:49,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258590 conditions, 46356 events. 31590/46356 cut-off events. For 1493326/1493326 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 310144 event pairs, 6350 based on Foata normal form. 5/46361 useless extension candidates. Maximal degree in co-relation 258526. Up to 10269 conditions per place. [2025-02-06 04:34:49,955 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 658 selfloop transitions, 537 changer transitions 66/1262 dead transitions. [2025-02-06 04:34:49,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1262 transitions, 15589 flow [2025-02-06 04:34:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-02-06 04:34:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-02-06 04:34:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 852 transitions. [2025-02-06 04:34:49,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2025-02-06 04:34:49,958 INFO L175 Difference]: Start difference. First operand has 192 places, 366 transitions, 3757 flow. Second operand 63 states and 852 transitions. [2025-02-06 04:34:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1262 transitions, 15589 flow [2025-02-06 04:35:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1262 transitions, 13188 flow, removed 1136 selfloop flow, removed 11 redundant places. [2025-02-06 04:35:00,361 INFO L231 Difference]: Finished difference. Result has 263 places, 706 transitions, 8533 flow [2025-02-06 04:35:00,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=8533, PETRI_PLACES=263, PETRI_TRANSITIONS=706} [2025-02-06 04:35:00,365 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 228 predicate places. [2025-02-06 04:35:00,365 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 706 transitions, 8533 flow [2025-02-06 04:35:00,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.038461538461538) internal successors, (183), 26 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:00,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:00,366 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:00,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 04:35:00,566 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,SelfDestructingSolverStorable7 [2025-02-06 04:35:00,567 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:35:00,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2072212189, now seen corresponding path program 4 times [2025-02-06 04:35:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058885769] [2025-02-06 04:35:00,568 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:00,589 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:35:00,614 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:35:00,615 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:00,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058885769] [2025-02-06 04:35:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058885769] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554480512] [2025-02-06 04:35:01,188 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:35:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:01,191 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 04:35:01,192 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 04:35:01,257 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:35:01,283 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:35:01,283 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:35:01,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:01,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-06 04:35:01,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:35:01,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-06 04:35:01,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:35:01,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:35:01,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2025-02-06 04:35:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:35:02,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:35:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:35:02,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554480512] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:35:02,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:35:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2025-02-06 04:35:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035279675] [2025-02-06 04:35:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:35:02,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 04:35:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:35:02,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 04:35:02,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2025-02-06 04:35:02,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2025-02-06 04:35:02,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 706 transitions, 8533 flow. Second operand has 30 states, 30 states have (on average 6.766666666666667) internal successors, (203), 30 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:02,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:35:02,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2025-02-06 04:35:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:35:14,672 INFO L124 PetriNetUnfolderBase]: 36948/54399 cut-off events. [2025-02-06 04:35:14,673 INFO L125 PetriNetUnfolderBase]: For 2838111/2838111 co-relation queries the response was YES. [2025-02-06 04:35:15,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345902 conditions, 54399 events. 36948/54399 cut-off events. For 2838111/2838111 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 376838 event pairs, 13517 based on Foata normal form. 1/54400 useless extension candidates. Maximal degree in co-relation 345818. Up to 27330 conditions per place. [2025-02-06 04:35:16,061 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 798 selfloop transitions, 338 changer transitions 21/1158 dead transitions. [2025-02-06 04:35:16,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1158 transitions, 17490 flow [2025-02-06 04:35:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 04:35:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 04:35:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 379 transitions. [2025-02-06 04:35:16,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4386574074074074 [2025-02-06 04:35:16,067 INFO L175 Difference]: Start difference. First operand has 263 places, 706 transitions, 8533 flow. Second operand 24 states and 379 transitions. [2025-02-06 04:35:16,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1158 transitions, 17490 flow [2025-02-06 04:35:42,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1158 transitions, 14989 flow, removed 1249 selfloop flow, removed 3 redundant places. [2025-02-06 04:35:42,648 INFO L231 Difference]: Finished difference. Result has 293 places, 833 transitions, 9858 flow [2025-02-06 04:35:42,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9858, PETRI_PLACES=293, PETRI_TRANSITIONS=833} [2025-02-06 04:35:42,650 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 258 predicate places. [2025-02-06 04:35:42,650 INFO L471 AbstractCegarLoop]: Abstraction has has 293 places, 833 transitions, 9858 flow [2025-02-06 04:35:42,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.766666666666667) internal successors, (203), 30 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:35:42,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:35:42,652 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:35:42,658 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 04:35:42,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:42,856 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:35:42,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:35:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1072673977, now seen corresponding path program 5 times [2025-02-06 04:35:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:35:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56372325] [2025-02-06 04:35:42,857 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:35:42,867 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 3 equivalence classes. [2025-02-06 04:35:42,913 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:35:42,914 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:35:42,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:35:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:35:43,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:35:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56372325] [2025-02-06 04:35:43,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56372325] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:35:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504735883] [2025-02-06 04:35:43,568 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:35:43,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:35:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:35:43,573 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 04:35:43,577 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