./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:45:47,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:45:47,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:45:47,795 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:45:47,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:45:47,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:45:47,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:45:47,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:45:47,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:45:47,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:45:47,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:45:47,817 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:45:47,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:45:47,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:45:47,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:45:47,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:45:47,820 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:45:47,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:47,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:45:47,821 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2025-03-17 06:45:48,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:45:48,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:45:48,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:45:48,054 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:45:48,054 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:45:48,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-03-17 06:45:49,167 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca6b18e5/d5eb5c64a07141e5afaf14eaa420f5f5/FLAGd0ee283d2 [2025-03-17 06:45:49,389 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:45:49,390 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-03-17 06:45:49,395 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca6b18e5/d5eb5c64a07141e5afaf14eaa420f5f5/FLAGd0ee283d2 [2025-03-17 06:45:49,736 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca6b18e5/d5eb5c64a07141e5afaf14eaa420f5f5 [2025-03-17 06:45:49,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:45:49,739 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:45:49,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:49,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:45:49,742 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:45:49,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f52c38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49, skipping insertion in model container [2025-03-17 06:45:49,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,757 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:45:49,848 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2025-03-17 06:45:49,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:49,859 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:45:49,872 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2025-03-17 06:45:49,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:49,887 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:45:49,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49 WrapperNode [2025-03-17 06:45:49,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:49,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:49,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:45:49,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:45:49,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,919 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2025-03-17 06:45:49,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:49,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:45:49,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:45:49,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:45:49,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,945 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 06:45:49,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,950 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:45:49,958 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:45:49,958 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:45:49,958 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:45:49,959 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (1/1) ... [2025-03-17 06:45:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:49,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:45:49,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:45:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:45:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:45:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:45:50,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:45:50,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:45:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:45:50,009 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:45:50,087 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:45:50,088 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:45:50,296 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:45:50,297 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:45:50,437 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:45:50,438 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:45:50,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:50 BoogieIcfgContainer [2025-03-17 06:45:50,438 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:45:50,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:45:50,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:45:50,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:45:50,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:45:49" (1/3) ... [2025-03-17 06:45:50,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16390e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:50, skipping insertion in model container [2025-03-17 06:45:50,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:49" (2/3) ... [2025-03-17 06:45:50,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16390e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:50, skipping insertion in model container [2025-03-17 06:45:50,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:50" (3/3) ... [2025-03-17 06:45:50,446 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2025-03-17 06:45:50,456 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:45:50,458 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-queue.wvr.c that has 3 procedures, 24 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-17 06:45:50,458 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:45:50,498 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:45:50,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2025-03-17 06:45:50,556 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2025-03-17 06:45:50,559 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:45:50,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-03-17 06:45:50,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2025-03-17 06:45:50,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2025-03-17 06:45:50,573 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:45:50,581 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;@7008bcd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:45:50,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:45:50,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:45:50,592 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-03-17 06:45:50,592 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:45:50,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:50,593 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:50,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:50,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1946435900, now seen corresponding path program 1 times [2025-03-17 06:45:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123174342] [2025-03-17 06:45:50,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:50,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 06:45:50,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 06:45:50,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:50,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123174342] [2025-03-17 06:45:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123174342] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:50,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3181383] [2025-03-17 06:45:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:50,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:45:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:50,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:45:50,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:45:50,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:50,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:50,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:50,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:50,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:50,869 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2025-03-17 06:45:50,869 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-03-17 06:45:50,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 714 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2025-03-17 06:45:50,872 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2025-03-17 06:45:50,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2025-03-17 06:45:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:45:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:45:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2025-03-17 06:45:50,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-17 06:45:50,885 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2025-03-17 06:45:50,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2025-03-17 06:45:50,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:50,891 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2025-03-17 06:45:50,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-03-17 06:45:50,895 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-03-17 06:45:50,895 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2025-03-17 06:45:50,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:50,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:50,895 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:50,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:45:50,896 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:50,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -935714413, now seen corresponding path program 1 times [2025-03-17 06:45:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:50,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236659358] [2025-03-17 06:45:50,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:50,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:45:50,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:45:50,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:50,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236659358] [2025-03-17 06:45:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236659358] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:51,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909218020] [2025-03-17 06:45:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:51,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:45:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:51,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:45:51,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:45:51,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:51,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:51,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:51,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:51,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:51,094 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2025-03-17 06:45:51,095 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 06:45:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1260 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2025-03-17 06:45:51,097 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2025-03-17 06:45:51,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2025-03-17 06:45:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:45:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:45:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-03-17 06:45:51,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 06:45:51,099 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2025-03-17 06:45:51,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2025-03-17 06:45:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:45:51,101 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2025-03-17 06:45:51,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2025-03-17 06:45:51,101 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2025-03-17 06:45:51,101 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2025-03-17 06:45:51,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:51,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:51,102 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:51,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:45:51,102 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:51,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1814277068, now seen corresponding path program 1 times [2025-03-17 06:45:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:51,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038054053] [2025-03-17 06:45:51,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:51,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:45:51,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:45:51,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:51,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038054053] [2025-03-17 06:45:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038054053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:51,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019881981] [2025-03-17 06:45:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:51,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:45:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:51,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:45:51,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:45:51,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:51,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:51,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:51,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:51,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:51,340 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2025-03-17 06:45:51,340 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-03-17 06:45:51,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1683 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2025-03-17 06:45:51,345 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2025-03-17 06:45:51,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2025-03-17 06:45:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:45:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:45:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-17 06:45:51,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-03-17 06:45:51,348 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2025-03-17 06:45:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2025-03-17 06:45:51,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:51,349 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2025-03-17 06:45:51,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2025-03-17 06:45:51,350 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2025-03-17 06:45:51,350 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2025-03-17 06:45:51,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:51,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:51,351 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:51,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:45:51,351 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:51,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1776220816, now seen corresponding path program 1 times [2025-03-17 06:45:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676688181] [2025-03-17 06:45:51,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:51,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:45:51,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:45:51,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:51,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:51,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:51,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676688181] [2025-03-17 06:45:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676688181] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:51,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:51,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:45:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199004383] [2025-03-17 06:45:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:51,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:51,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:51,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:45:51,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:51,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 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) [2025-03-17 06:45:51,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:51,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:51,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:51,635 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2025-03-17 06:45:51,636 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-03-17 06:45:51,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2458 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2025-03-17 06:45:51,640 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2025-03-17 06:45:51,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2025-03-17 06:45:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2025-03-17 06:45:51,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-03-17 06:45:51,642 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2025-03-17 06:45:51,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2025-03-17 06:45:51,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:51,644 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2025-03-17 06:45:51,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2025-03-17 06:45:51,646 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-03-17 06:45:51,646 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2025-03-17 06:45:51,646 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) [2025-03-17 06:45:51,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:51,647 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:51,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:45:51,647 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:51,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash 711997518, now seen corresponding path program 1 times [2025-03-17 06:45:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:51,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619416853] [2025-03-17 06:45:51,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:51,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:45:51,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:45:51,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:51,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:52,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619416853] [2025-03-17 06:45:52,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619416853] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431119088] [2025-03-17 06:45:52,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:52,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:52,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:52,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:52,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:45:52,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:45:52,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:45:52,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:52,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:52,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 06:45:52,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:52,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-17 06:45:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:52,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:52,697 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 38 treesize of output 34 [2025-03-17 06:45:52,712 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:52,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2025-03-17 06:45:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:52,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431119088] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:52,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:52,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-17 06:45:52,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824158113] [2025-03-17 06:45:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:52,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:45:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:52,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:45:52,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:45:52,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:52,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:52,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:52,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:52,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:53,454 INFO L124 PetriNetUnfolderBase]: 1151/2030 cut-off events. [2025-03-17 06:45:53,454 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2025-03-17 06:45:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 2030 events. 1151/2030 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10459 event pairs, 423 based on Foata normal form. 5/1719 useless extension candidates. Maximal degree in co-relation 4445. Up to 452 conditions per place. [2025-03-17 06:45:53,463 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 109 selfloop transitions, 21 changer transitions 30/163 dead transitions. [2025-03-17 06:45:53,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 163 transitions, 764 flow [2025-03-17 06:45:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:45:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:45:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 231 transitions. [2025-03-17 06:45:53,465 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2025-03-17 06:45:53,465 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 14 states and 231 transitions. [2025-03-17 06:45:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 163 transitions, 764 flow [2025-03-17 06:45:53,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 163 transitions, 752 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 06:45:53,469 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 258 flow [2025-03-17 06:45:53,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=258, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2025-03-17 06:45:53,470 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2025-03-17 06:45:53,470 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 258 flow [2025-03-17 06:45:53,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:53,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:53,470 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:45:53,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:53,675 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:53,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1254706136, now seen corresponding path program 2 times [2025-03-17 06:45:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:53,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728680287] [2025-03-17 06:45:53,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:53,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:45:53,703 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-17 06:45:53,703 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:45:53,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 06:45:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728680287] [2025-03-17 06:45:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728680287] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:53,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:53,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:45:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189320235] [2025-03-17 06:45:53,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:53,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:45:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:53,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:45:53,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:45:53,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:53,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 258 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) [2025-03-17 06:45:53,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:53,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:53,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:53,967 INFO L124 PetriNetUnfolderBase]: 1311/2302 cut-off events. [2025-03-17 06:45:53,968 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2025-03-17 06:45:53,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5651 conditions, 2302 events. 1311/2302 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12127 event pairs, 360 based on Foata normal form. 1/1937 useless extension candidates. Maximal degree in co-relation 5636. Up to 727 conditions per place. [2025-03-17 06:45:53,982 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 57 selfloop transitions, 12 changer transitions 12/84 dead transitions. [2025-03-17 06:45:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 530 flow [2025-03-17 06:45:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:45:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:45:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-17 06:45:53,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2025-03-17 06:45:53,984 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 258 flow. Second operand 5 states and 86 transitions. [2025-03-17 06:45:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 530 flow [2025-03-17 06:45:53,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 508 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:53,998 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 286 flow [2025-03-17 06:45:53,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2025-03-17 06:45:53,999 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2025-03-17 06:45:53,999 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 286 flow [2025-03-17 06:45:53,999 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) [2025-03-17 06:45:53,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:53,999 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:53,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:45:53,999 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:54,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 914725111, now seen corresponding path program 3 times [2025-03-17 06:45:54,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:54,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792657526] [2025-03-17 06:45:54,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:54,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:54,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:45:54,020 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:45:54,020 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:45:54,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:54,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:54,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792657526] [2025-03-17 06:45:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792657526] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:45:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117072640] [2025-03-17 06:45:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:54,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:54,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:54,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:45:54,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:54,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:54,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:54,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:54,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:54,353 INFO L124 PetriNetUnfolderBase]: 2326/4079 cut-off events. [2025-03-17 06:45:54,353 INFO L125 PetriNetUnfolderBase]: For 4175/4175 co-relation queries the response was YES. [2025-03-17 06:45:54,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10277 conditions, 4079 events. 2326/4079 cut-off events. For 4175/4175 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 23857 event pairs, 936 based on Foata normal form. 55/3489 useless extension candidates. Maximal degree in co-relation 10260. Up to 1781 conditions per place. [2025-03-17 06:45:54,369 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 67 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2025-03-17 06:45:54,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 650 flow [2025-03-17 06:45:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2025-03-17 06:45:54,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-17 06:45:54,370 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 286 flow. Second operand 4 states and 72 transitions. [2025-03-17 06:45:54,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 650 flow [2025-03-17 06:45:54,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 612 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:54,378 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 452 flow [2025-03-17 06:45:54,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=452, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2025-03-17 06:45:54,379 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2025-03-17 06:45:54,379 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 452 flow [2025-03-17 06:45:54,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:54,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:54,379 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:54,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:45:54,380 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:54,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1620019659, now seen corresponding path program 4 times [2025-03-17 06:45:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181174443] [2025-03-17 06:45:54,380 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:54,386 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:45:54,401 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:45:54,401 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:54,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:54,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181174443] [2025-03-17 06:45:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181174443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35225033] [2025-03-17 06:45:54,550 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:54,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:54,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:45:54,592 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:45:54,609 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:45:54,609 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:54,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:54,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 06:45:54,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:54,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-17 06:45:54,808 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:54,809 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 23 treesize of output 10 [2025-03-17 06:45:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:54,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:55,150 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 39 treesize of output 35 [2025-03-17 06:45:55,158 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:45:55,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2025-03-17 06:45:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35225033] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:55,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:55,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2025-03-17 06:45:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655390427] [2025-03-17 06:45:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:55,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 06:45:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:55,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 06:45:55,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2025-03-17 06:45:55,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:55,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 452 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:55,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:55,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:55,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:56,409 INFO L124 PetriNetUnfolderBase]: 3882/6831 cut-off events. [2025-03-17 06:45:56,410 INFO L125 PetriNetUnfolderBase]: For 11394/11394 co-relation queries the response was YES. [2025-03-17 06:45:56,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17965 conditions, 6831 events. 3882/6831 cut-off events. For 11394/11394 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 43314 event pairs, 599 based on Foata normal form. 132/5881 useless extension candidates. Maximal degree in co-relation 17947. Up to 1250 conditions per place. [2025-03-17 06:45:56,432 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 129 selfloop transitions, 37 changer transitions 96/265 dead transitions. [2025-03-17 06:45:56,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 265 transitions, 1738 flow [2025-03-17 06:45:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 06:45:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 06:45:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2025-03-17 06:45:56,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2025-03-17 06:45:56,434 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 452 flow. Second operand 20 states and 338 transitions. [2025-03-17 06:45:56,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 265 transitions, 1738 flow [2025-03-17 06:45:56,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 265 transitions, 1708 flow, removed 15 selfloop flow, removed 0 redundant places. [2025-03-17 06:45:56,451 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 671 flow [2025-03-17 06:45:56,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=671, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2025-03-17 06:45:56,452 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2025-03-17 06:45:56,454 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 671 flow [2025-03-17 06:45:56,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:56,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:56,454 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:56,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:45:56,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-17 06:45:56,655 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:56,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 519605399, now seen corresponding path program 5 times [2025-03-17 06:45:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309464630] [2025-03-17 06:45:56,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:45:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:56,664 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:45:56,676 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:45:56,680 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:56,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309464630] [2025-03-17 06:45:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309464630] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752459094] [2025-03-17 06:45:57,094 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:45:57,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:57,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:57,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:45:57,136 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:45:57,154 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:45:57,155 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:57,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:57,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 06:45:57,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:57,422 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:57,422 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 23 treesize of output 10 [2025-03-17 06:45:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:57,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:57,504 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:45:57,504 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 25 treesize of output 13 [2025-03-17 06:45:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:57,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752459094] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:57,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:57,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-17 06:45:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208565543] [2025-03-17 06:45:57,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:57,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:45:57,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:57,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:45:57,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:45:57,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:57,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 671 flow. Second operand has 23 states, 23 states have (on average 8.217391304347826) internal successors, (189), 23 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:57,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:57,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:57,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:58,592 INFO L124 PetriNetUnfolderBase]: 3352/5915 cut-off events. [2025-03-17 06:45:58,593 INFO L125 PetriNetUnfolderBase]: For 18132/18132 co-relation queries the response was YES. [2025-03-17 06:45:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16898 conditions, 5915 events. 3352/5915 cut-off events. For 18132/18132 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 35739 event pairs, 1277 based on Foata normal form. 5/4985 useless extension candidates. Maximal degree in co-relation 16867. Up to 2325 conditions per place. [2025-03-17 06:45:58,618 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 140 selfloop transitions, 27 changer transitions 28/198 dead transitions. [2025-03-17 06:45:58,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 198 transitions, 1616 flow [2025-03-17 06:45:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:45:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:45:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 239 transitions. [2025-03-17 06:45:58,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2025-03-17 06:45:58,619 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 671 flow. Second operand 15 states and 239 transitions. [2025-03-17 06:45:58,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 198 transitions, 1616 flow [2025-03-17 06:45:58,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 198 transitions, 1390 flow, removed 84 selfloop flow, removed 9 redundant places. [2025-03-17 06:45:58,657 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 650 flow [2025-03-17 06:45:58,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=650, PETRI_PLACES=92, PETRI_TRANSITIONS=71} [2025-03-17 06:45:58,658 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2025-03-17 06:45:58,658 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 650 flow [2025-03-17 06:45:58,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.217391304347826) internal successors, (189), 23 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:58,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:58,658 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:58,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:45:58,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:58,861 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:58,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1563451369, now seen corresponding path program 6 times [2025-03-17 06:45:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117032434] [2025-03-17 06:45:58,862 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:45:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:58,868 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-03-17 06:45:58,882 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 06:45:58,882 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:45:58,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:45:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117032434] [2025-03-17 06:45:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117032434] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012969141] [2025-03-17 06:45:58,987 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:45:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:58,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:45:59,032 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-03-17 06:45:59,049 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 06:45:59,049 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:45:59,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:59,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 06:45:59,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:45:59,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:59,271 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:59,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-03-17 06:45:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:45:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012969141] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:59,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-17 06:45:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033220008] [2025-03-17 06:45:59,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:59,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:45:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:59,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:45:59,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:45:59,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:59,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 650 flow. Second operand has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:59,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:59,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:59,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:00,278 INFO L124 PetriNetUnfolderBase]: 5411/9456 cut-off events. [2025-03-17 06:46:00,279 INFO L125 PetriNetUnfolderBase]: For 23665/23665 co-relation queries the response was YES. [2025-03-17 06:46:00,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25970 conditions, 9456 events. 5411/9456 cut-off events. For 23665/23665 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 60520 event pairs, 672 based on Foata normal form. 49/8008 useless extension candidates. Maximal degree in co-relation 25939. Up to 1725 conditions per place. [2025-03-17 06:46:00,313 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 0 selfloop transitions, 0 changer transitions 220/220 dead transitions. [2025-03-17 06:46:00,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1756 flow [2025-03-17 06:46:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 06:46:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 06:46:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2025-03-17 06:46:00,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291208791208791 [2025-03-17 06:46:00,318 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 650 flow. Second operand 13 states and 229 transitions. [2025-03-17 06:46:00,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1756 flow [2025-03-17 06:46:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 220 transitions, 1547 flow, removed 46 selfloop flow, removed 17 redundant places. [2025-03-17 06:46:00,350 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2025-03-17 06:46:00,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=85, PETRI_TRANSITIONS=0} [2025-03-17 06:46:00,352 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2025-03-17 06:46:00,352 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2025-03-17 06:46:00,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:00,354 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-03-17 06:46:00,355 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-03-17 06:46:00,355 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-03-17 06:46:00,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:46:00,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:00,556 INFO L422 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2025-03-17 06:46:00,558 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-17 06:46:00,558 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-17 06:46:00,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:46:00 BasicIcfg [2025-03-17 06:46:00,562 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-17 06:46:00,562 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-17 06:46:00,562 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-17 06:46:00,562 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-17 06:46:00,563 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:50" (3/4) ... [2025-03-17 06:46:00,564 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-17 06:46:00,566 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-03-17 06:46:00,566 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-03-17 06:46:00,569 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 60 nodes and edges [2025-03-17 06:46:00,569 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2025-03-17 06:46:00,569 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-03-17 06:46:00,569 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-17 06:46:00,631 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-17 06:46:00,631 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-17 06:46:00,631 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-17 06:46:00,633 INFO L158 Benchmark]: Toolchain (without parser) took 10893.27ms. Allocated memory was 201.3MB in the beginning and 570.4MB in the end (delta: 369.1MB). Free memory was 159.3MB in the beginning and 348.9MB in the end (delta: -189.7MB). Peak memory consumption was 178.9MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,634 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:46:00,634 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.82ms. Allocated memory is still 201.3MB. Free memory was 159.3MB in the beginning and 147.5MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,634 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.36ms. Allocated memory is still 201.3MB. Free memory was 147.5MB in the beginning and 145.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:46:00,634 INFO L158 Benchmark]: Boogie Preprocessor took 37.61ms. Allocated memory is still 201.3MB. Free memory was 145.9MB in the beginning and 144.1MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,635 INFO L158 Benchmark]: IcfgBuilder took 479.92ms. Allocated memory is still 201.3MB. Free memory was 144.1MB in the beginning and 111.0MB in the end (delta: 33.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,635 INFO L158 Benchmark]: TraceAbstraction took 10121.78ms. Allocated memory was 201.3MB in the beginning and 570.4MB in the end (delta: 369.1MB). Free memory was 110.6MB in the beginning and 353.4MB in the end (delta: -242.8MB). Peak memory consumption was 237.7MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,635 INFO L158 Benchmark]: Witness Printer took 69.22ms. Allocated memory is still 570.4MB. Free memory was 353.4MB in the beginning and 348.9MB in the end (delta: 4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-17 06:46:00,636 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.82ms. Allocated memory is still 201.3MB. Free memory was 159.3MB in the beginning and 147.5MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.36ms. Allocated memory is still 201.3MB. Free memory was 147.5MB in the beginning and 145.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.61ms. Allocated memory is still 201.3MB. Free memory was 145.9MB in the beginning and 144.1MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 479.92ms. Allocated memory is still 201.3MB. Free memory was 144.1MB in the beginning and 111.0MB in the end (delta: 33.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10121.78ms. Allocated memory was 201.3MB in the beginning and 570.4MB in the end (delta: 369.1MB). Free memory was 110.6MB in the beginning and 353.4MB in the end (delta: -242.8MB). Peak memory consumption was 237.7MB. Max. memory is 16.1GB. * Witness Printer took 69.22ms. Allocated memory is still 570.4MB. Free memory was 353.4MB in the beginning and 348.9MB in the end (delta: 4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 86]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 38 locations, 46 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.0s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1156 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1156 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2363 IncrementalHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 0 mSDtfsCounter, 2363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=671occurred in iteration=8, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 380 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 484 ConstructedInterpolants, 34 QuantifiedInterpolants, 4956 SizeOfPredicates, 41 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 41/100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-17 06:46:00,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE