./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 c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:43:24,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:43:24,343 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:43:24,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:43:24,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:43:24,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:43:24,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:43:24,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:43:24,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:43:24,361 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:43:24,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:43:24,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:43:24,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:43:24,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:43:24,362 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:43:24,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:43:24,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:43:24,362 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:43:24,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:43:24,365 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:43:24,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:43:24,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:43:24,366 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2025-02-06 04:43:24,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:43:24,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:43:24,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:43:24,579 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:43:24,579 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:43:24,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-02-06 04:43:25,679 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e50342f33/2c165b89903b40d3a2dc0a4b0aa69d95/FLAGebc037bad [2025-02-06 04:43:25,890 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:43:25,891 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-02-06 04:43:25,897 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e50342f33/2c165b89903b40d3a2dc0a4b0aa69d95/FLAGebc037bad [2025-02-06 04:43:26,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e50342f33/2c165b89903b40d3a2dc0a4b0aa69d95 [2025-02-06 04:43:26,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:43:26,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:43:26,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:43:26,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:43:26,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:43:26,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465ecbf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26, skipping insertion in model container [2025-02-06 04:43:26,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:43:26,389 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2025-02-06 04:43:26,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:43:26,405 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:43:26,421 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2025-02-06 04:43:26,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:43:26,436 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:43:26,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26 WrapperNode [2025-02-06 04:43:26,437 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:43:26,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:43:26,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:43:26,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:43:26,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,449 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,465 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2025-02-06 04:43:26,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:43:26,466 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:43:26,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:43:26,466 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:43:26,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,479 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,489 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 04:43:26,490 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,490 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,496 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:43:26,502 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:43:26,502 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:43:26,502 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:43:26,505 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (1/1) ... [2025-02-06 04:43:26,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:43:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:43:26,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:43:26,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:43:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:43:26,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:43:26,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:43:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:43:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:43:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:43:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:43:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:43:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:43:26,552 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:43:26,620 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:43:26,621 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:43:26,788 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:43:26,788 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:43:26,909 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:43:26,910 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:43:26,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:43:26 BoogieIcfgContainer [2025-02-06 04:43:26,911 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:43:26,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:43:26,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:43:26,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:43:26,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:43:26" (1/3) ... [2025-02-06 04:43:26,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8d631b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:43:26, skipping insertion in model container [2025-02-06 04:43:26,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:43:26" (2/3) ... [2025-02-06 04:43:26,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8d631b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:43:26, skipping insertion in model container [2025-02-06 04:43:26,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:43:26" (3/3) ... [2025-02-06 04:43:26,918 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2025-02-06 04:43:26,927 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:43:26,929 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. [2025-02-06 04:43:26,929 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:43:26,964 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:43:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2025-02-06 04:43:27,007 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2025-02-06 04:43:27,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:43:27,011 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. [2025-02-06 04:43:27,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2025-02-06 04:43:27,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2025-02-06 04:43:27,019 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:43:27,026 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34a6e5f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:43:27,026 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:43:27,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:43:27,035 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-02-06 04:43:27,035 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:43:27,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:27,036 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:43:27,036 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:27,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1076186452, now seen corresponding path program 1 times [2025-02-06 04:43:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:27,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890698397] [2025-02-06 04:43:27,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:27,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:43:27,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:43:27,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:27,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:27,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890698397] [2025-02-06 04:43:27,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890698397] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:27,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:43:27,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103392263] [2025-02-06 04:43:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:27,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:43:27,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:27,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:43:27,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:43:27,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:27,216 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) [2025-02-06 04:43:27,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:27,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:27,300 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2025-02-06 04:43:27,300 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-06 04:43:27,303 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. [2025-02-06 04:43:27,305 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2025-02-06 04:43:27,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2025-02-06 04:43:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 04:43:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 04:43:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2025-02-06 04:43:27,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-02-06 04:43:27,319 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2025-02-06 04:43:27,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2025-02-06 04:43:27,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:43:27,328 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2025-02-06 04:43:27,330 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} [2025-02-06 04:43:27,332 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-02-06 04:43:27,333 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2025-02-06 04:43:27,333 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) [2025-02-06 04:43:27,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:27,333 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:43:27,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:43:27,333 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:27,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -108195879, now seen corresponding path program 1 times [2025-02-06 04:43:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:27,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153825584] [2025-02-06 04:43:27,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:27,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:27,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:43:27,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:43:27,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:27,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153825584] [2025-02-06 04:43:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153825584] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:27,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:27,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:43:27,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140938954] [2025-02-06 04:43:27,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:27,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:43:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:27,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:43:27,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:43:27,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:27,439 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) [2025-02-06 04:43:27,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:27,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:27,522 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2025-02-06 04:43:27,522 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 04:43:27,523 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 1257 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. [2025-02-06 04:43:27,524 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2025-02-06 04:43:27,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2025-02-06 04:43:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:43:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:43:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-02-06 04:43:27,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 04:43:27,525 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2025-02-06 04:43:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2025-02-06 04:43:27,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:43:27,527 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2025-02-06 04:43:27,527 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} [2025-02-06 04:43:27,528 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2025-02-06 04:43:27,528 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2025-02-06 04:43:27,528 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) [2025-02-06 04:43:27,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:27,528 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] [2025-02-06 04:43:27,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:43:27,528 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:27,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1313110838, now seen corresponding path program 1 times [2025-02-06 04:43:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:27,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001825620] [2025-02-06 04:43:27,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:27,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:43:27,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:43:27,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:27,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:27,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:27,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001825620] [2025-02-06 04:43:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001825620] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:27,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:43:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334703125] [2025-02-06 04:43:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:27,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:43:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:27,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:43:27,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:43:27,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:27,648 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) [2025-02-06 04:43:27,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:27,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:27,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:27,732 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2025-02-06 04:43:27,733 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-06 04:43:27,733 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 1678 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. [2025-02-06 04:43:27,736 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2025-02-06 04:43:27,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2025-02-06 04:43:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:43:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:43:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-02-06 04:43:27,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-02-06 04:43:27,738 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2025-02-06 04:43:27,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2025-02-06 04:43:27,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:43:27,739 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2025-02-06 04:43:27,740 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} [2025-02-06 04:43:27,740 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2025-02-06 04:43:27,741 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2025-02-06 04:43:27,741 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) [2025-02-06 04:43:27,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:27,741 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] [2025-02-06 04:43:27,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:43:27,742 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:27,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:27,742 INFO L85 PathProgramCache]: Analyzing trace with hash 845850198, now seen corresponding path program 1 times [2025-02-06 04:43:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385685046] [2025-02-06 04:43:27,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:27,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:27,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 04:43:27,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 04:43:27,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:27,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:27,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:27,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385685046] [2025-02-06 04:43:27,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385685046] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:27,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:27,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:43:27,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142490305] [2025-02-06 04:43:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:27,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:43:27,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:27,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:43:27,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:43:27,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:27,910 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) [2025-02-06 04:43:27,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:27,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:27,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:28,000 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2025-02-06 04:43:28,001 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-02-06 04:43:28,002 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 2456 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. [2025-02-06 04:43:28,003 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2025-02-06 04:43:28,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2025-02-06 04:43:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:43:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:43:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2025-02-06 04:43:28,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-02-06 04:43:28,005 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2025-02-06 04:43:28,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2025-02-06 04:43:28,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:43:28,006 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2025-02-06 04:43:28,006 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} [2025-02-06 04:43:28,007 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-02-06 04:43:28,007 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2025-02-06 04:43:28,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:43:28,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:28,007 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] [2025-02-06 04:43:28,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:43:28,007 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:28,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash -77824490, now seen corresponding path program 1 times [2025-02-06 04:43:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:28,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032697602] [2025-02-06 04:43:28,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:28,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:43:28,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:43:28,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:28,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032697602] [2025-02-06 04:43:28,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032697602] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:43:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690306580] [2025-02-06 04:43:28,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:43:28,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:43:28,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:43:28,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:43:28,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 04:43:28,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:43:28,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:43:28,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:28,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:43:28,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:43:28,535 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 [2025-02-06 04:43:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:28,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:43:28,970 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 [2025-02-06 04:43:28,984 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:43:28,984 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 [2025-02-06 04:43:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690306580] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:43:29,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:43:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-06 04:43:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053901385] [2025-02-06 04:43:29,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:43:29,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 04:43:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:29,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 04:43:29,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-02-06 04:43:29,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:29,034 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) [2025-02-06 04:43:29,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:29,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:29,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:29,658 INFO L124 PetriNetUnfolderBase]: 1151/2030 cut-off events. [2025-02-06 04:43:29,658 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2025-02-06 04:43:29,660 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 10458 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. [2025-02-06 04:43:29,665 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 109 selfloop transitions, 21 changer transitions 30/163 dead transitions. [2025-02-06 04:43:29,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 163 transitions, 764 flow [2025-02-06 04:43:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:43:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:43:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 231 transitions. [2025-02-06 04:43:29,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2025-02-06 04:43:29,668 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 14 states and 231 transitions. [2025-02-06 04:43:29,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 163 transitions, 764 flow [2025-02-06 04:43:29,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 163 transitions, 752 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-02-06 04:43:29,671 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 258 flow [2025-02-06 04:43:29,671 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} [2025-02-06 04:43:29,672 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2025-02-06 04:43:29,672 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 258 flow [2025-02-06 04:43:29,672 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) [2025-02-06 04:43:29,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:29,672 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] [2025-02-06 04:43:29,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 04:43:29,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:29,874 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:29,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash -568733586, now seen corresponding path program 2 times [2025-02-06 04:43:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:29,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079397767] [2025-02-06 04:43:29,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:43:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:29,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:43:29,891 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 04:43:29,891 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:43:29,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:43:29,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:29,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079397767] [2025-02-06 04:43:29,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079397767] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:29,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:29,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:43:29,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890182404] [2025-02-06 04:43:29,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:29,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:43:29,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:29,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:43:29,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:43:29,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:29,937 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) [2025-02-06 04:43:29,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:29,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:29,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:30,151 INFO L124 PetriNetUnfolderBase]: 1311/2302 cut-off events. [2025-02-06 04:43:30,152 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2025-02-06 04:43:30,156 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 12133 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. [2025-02-06 04:43:30,162 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 57 selfloop transitions, 12 changer transitions 12/84 dead transitions. [2025-02-06 04:43:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 530 flow [2025-02-06 04:43:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:43:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:43:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-02-06 04:43:30,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2025-02-06 04:43:30,164 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 258 flow. Second operand 5 states and 86 transitions. [2025-02-06 04:43:30,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 530 flow [2025-02-06 04:43:30,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 508 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-02-06 04:43:30,175 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 286 flow [2025-02-06 04:43:30,175 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} [2025-02-06 04:43:30,177 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2025-02-06 04:43:30,177 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 286 flow [2025-02-06 04:43:30,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:43:30,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:30,177 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] [2025-02-06 04:43:30,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:43:30,177 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:30,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash 550802081, now seen corresponding path program 3 times [2025-02-06 04:43:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:30,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743313984] [2025-02-06 04:43:30,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:43:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:30,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:43:30,199 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:43:30,199 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:43:30,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:43:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743313984] [2025-02-06 04:43:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743313984] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:43:30,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:43:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:43:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742344357] [2025-02-06 04:43:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:43:30,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:43:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:30,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:43:30,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:43:30,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:30,248 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) [2025-02-06 04:43:30,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:30,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:30,505 INFO L124 PetriNetUnfolderBase]: 2326/4079 cut-off events. [2025-02-06 04:43:30,505 INFO L125 PetriNetUnfolderBase]: For 4175/4175 co-relation queries the response was YES. [2025-02-06 04:43:30,512 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 23817 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. [2025-02-06 04:43:30,521 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 67 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2025-02-06 04:43:30,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 650 flow [2025-02-06 04:43:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:43:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:43:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2025-02-06 04:43:30,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-02-06 04:43:30,522 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 286 flow. Second operand 4 states and 72 transitions. [2025-02-06 04:43:30,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 650 flow [2025-02-06 04:43:30,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 612 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-02-06 04:43:30,531 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 452 flow [2025-02-06 04:43:30,531 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} [2025-02-06 04:43:30,532 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2025-02-06 04:43:30,532 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 452 flow [2025-02-06 04:43:30,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:43:30,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:30,532 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] [2025-02-06 04:43:30,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 04:43:30,532 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:30,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1547882427, now seen corresponding path program 4 times [2025-02-06 04:43:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:30,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436908556] [2025-02-06 04:43:30,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:43:30,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:30,541 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:43:30,559 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:43:30,559 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:43:30,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:43:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436908556] [2025-02-06 04:43:30,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436908556] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:43:30,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553437760] [2025-02-06 04:43:30,696 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:43:30,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:30,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:43:30,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:43:30,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:43:30,740 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:43:30,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:43:30,762 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:43:30,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:30,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:43:30,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:43:30,805 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 [2025-02-06 04:43:30,964 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:43:30,965 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 [2025-02-06 04:43:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:30,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:43:31,306 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 [2025-02-06 04:43:31,318 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-02-06 04:43:31,318 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 [2025-02-06 04:43:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553437760] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:43:31,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:43:31,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2025-02-06 04:43:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033435859] [2025-02-06 04:43:31,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:43:31,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:43:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:31,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:43:31,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:43:31,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:31,403 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) [2025-02-06 04:43:31,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:31,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:31,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:32,614 INFO L124 PetriNetUnfolderBase]: 3882/6831 cut-off events. [2025-02-06 04:43:32,614 INFO L125 PetriNetUnfolderBase]: For 11394/11394 co-relation queries the response was YES. [2025-02-06 04:43:32,624 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 43309 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. [2025-02-06 04:43:32,637 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 129 selfloop transitions, 37 changer transitions 96/265 dead transitions. [2025-02-06 04:43:32,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 265 transitions, 1738 flow [2025-02-06 04:43:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 04:43:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 04:43:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2025-02-06 04:43:32,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2025-02-06 04:43:32,639 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 452 flow. Second operand 20 states and 338 transitions. [2025-02-06 04:43:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 265 transitions, 1738 flow [2025-02-06 04:43:32,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 265 transitions, 1708 flow, removed 15 selfloop flow, removed 0 redundant places. [2025-02-06 04:43:32,656 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 671 flow [2025-02-06 04:43:32,657 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} [2025-02-06 04:43:32,657 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2025-02-06 04:43:32,657 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 671 flow [2025-02-06 04:43:32,659 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) [2025-02-06 04:43:32,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:32,659 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] [2025-02-06 04:43:32,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 04:43:32,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:32,860 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:32,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -607459811, now seen corresponding path program 5 times [2025-02-06 04:43:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:32,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242967844] [2025-02-06 04:43:32,860 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:43:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:32,867 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:43:32,878 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:43:32,878 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:43:32,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242967844] [2025-02-06 04:43:33,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242967844] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:43:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137277321] [2025-02-06 04:43:33,250 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:43:33,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:43:33,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:43:33,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:43:33,290 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:43:33,309 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:43:33,310 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:43:33,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:33,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 04:43:33,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:43:33,541 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:43:33,542 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 [2025-02-06 04:43:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:33,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:43:33,618 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-02-06 04:43:33,618 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 [2025-02-06 04:43:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:43:33,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137277321] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:43:33,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:43:33,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-02-06 04:43:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768052791] [2025-02-06 04:43:33,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:43:33,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:43:33,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:33,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:43:33,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:43:33,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:33,907 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) [2025-02-06 04:43:33,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:33,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:33,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:34,782 INFO L124 PetriNetUnfolderBase]: 3352/5915 cut-off events. [2025-02-06 04:43:34,782 INFO L125 PetriNetUnfolderBase]: For 18132/18132 co-relation queries the response was YES. [2025-02-06 04:43:34,792 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 35752 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. [2025-02-06 04:43:34,813 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 140 selfloop transitions, 27 changer transitions 28/198 dead transitions. [2025-02-06 04:43:34,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 198 transitions, 1616 flow [2025-02-06 04:43:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 04:43:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 04:43:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 239 transitions. [2025-02-06 04:43:34,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2025-02-06 04:43:34,815 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 671 flow. Second operand 15 states and 239 transitions. [2025-02-06 04:43:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 198 transitions, 1616 flow [2025-02-06 04:43:34,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 198 transitions, 1390 flow, removed 84 selfloop flow, removed 9 redundant places. [2025-02-06 04:43:34,852 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 650 flow [2025-02-06 04:43:34,853 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} [2025-02-06 04:43:34,853 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2025-02-06 04:43:34,854 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 650 flow [2025-02-06 04:43:34,854 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) [2025-02-06 04:43:34,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:43:34,855 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] [2025-02-06 04:43:34,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 04:43:35,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:35,055 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:43:35,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:43:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1532064159, now seen corresponding path program 6 times [2025-02-06 04:43:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:43:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178986421] [2025-02-06 04:43:35,056 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:43:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:43:35,064 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-06 04:43:35,075 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 04:43:35,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:43:35,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:43:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:43:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178986421] [2025-02-06 04:43:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178986421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:43:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700268087] [2025-02-06 04:43:35,199 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:43:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:43:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:43:35,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:43:35,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:43:35,238 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-06 04:43:35,257 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 04:43:35,257 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:43:35,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:43:35,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:43:35,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:43:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:43:35,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:43:35,504 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:43:35,504 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 24 treesize of output 11 [2025-02-06 04:43:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:43:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700268087] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:43:35,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:43:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-06 04:43:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361758722] [2025-02-06 04:43:35,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:43:35,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 04:43:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:43:35,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 04:43:35,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-06 04:43:35,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-06 04:43:35,592 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) [2025-02-06 04:43:35,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:43:35,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-06 04:43:35,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:43:36,513 INFO L124 PetriNetUnfolderBase]: 5411/9456 cut-off events. [2025-02-06 04:43:36,513 INFO L125 PetriNetUnfolderBase]: For 23665/23665 co-relation queries the response was YES. [2025-02-06 04:43:36,536 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 60484 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. [2025-02-06 04:43:36,543 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 0 selfloop transitions, 0 changer transitions 220/220 dead transitions. [2025-02-06 04:43:36,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1756 flow [2025-02-06 04:43:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:43:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:43:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2025-02-06 04:43:36,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291208791208791 [2025-02-06 04:43:36,545 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 650 flow. Second operand 13 states and 229 transitions. [2025-02-06 04:43:36,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1756 flow [2025-02-06 04:43:36,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 220 transitions, 1547 flow, removed 46 selfloop flow, removed 17 redundant places. [2025-02-06 04:43:36,571 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2025-02-06 04:43:36,572 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} [2025-02-06 04:43:36,572 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2025-02-06 04:43:36,572 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2025-02-06 04:43:36,572 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) [2025-02-06 04:43:36,574 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-02-06 04:43:36,575 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-02-06 04:43:36,575 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-02-06 04:43:36,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 04:43:36,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 04:43:36,776 INFO L422 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2025-02-06 04:43:36,779 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:43:36,779 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:43:36,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:43:36 BasicIcfg [2025-02-06 04:43:36,782 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:43:36,783 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:43:36,783 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:43:36,783 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:43:36,783 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:43:26" (3/4) ... [2025-02-06 04:43:36,784 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-06 04:43:36,786 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-06 04:43:36,786 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-06 04:43:36,789 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 60 nodes and edges [2025-02-06 04:43:36,790 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2025-02-06 04:43:36,791 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-02-06 04:43:36,791 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-06 04:43:36,856 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:43:36,856 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:43:36,856 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:43:36,858 INFO L158 Benchmark]: Toolchain (without parser) took 10610.76ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 130.1MB in the beginning and 328.9MB in the end (delta: -198.8MB). Peak memory consumption was 348.1MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,858 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:43:36,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.77ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 117.8MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,859 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.15ms. Allocated memory is still 167.8MB. Free memory was 117.8MB in the beginning and 116.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:43:36,859 INFO L158 Benchmark]: Boogie Preprocessor took 35.24ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.9MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,860 INFO L158 Benchmark]: IcfgBuilder took 409.23ms. Allocated memory is still 167.8MB. Free memory was 114.9MB in the beginning and 81.8MB in the end (delta: 33.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,860 INFO L158 Benchmark]: TraceAbstraction took 9869.98ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 80.9MB in the beginning and 81.6MB in the end (delta: -729.0kB). Peak memory consumption was 280.5MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,860 INFO L158 Benchmark]: Witness Printer took 73.68ms. Allocated memory is still 453.0MB. Free memory was 81.6MB in the beginning and 328.9MB in the end (delta: -247.3MB). Peak memory consumption was 17.3MB. Max. memory is 16.1GB. [2025-02-06 04:43:36,861 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.77ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 117.8MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.15ms. Allocated memory is still 167.8MB. Free memory was 117.8MB in the beginning and 116.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.24ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.9MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 409.23ms. Allocated memory is still 167.8MB. Free memory was 114.9MB in the beginning and 81.8MB in the end (delta: 33.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9869.98ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 80.9MB in the beginning and 81.6MB in the end (delta: -729.0kB). Peak memory consumption was 280.5MB. Max. memory is 16.1GB. * Witness Printer took 73.68ms. Allocated memory is still 453.0MB. Free memory was 81.6MB in the beginning and 328.9MB in the end (delta: -247.3MB). Peak memory consumption was 17.3MB. 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, 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: 9.8s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, 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, 1.4s 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, 3.6s 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! [2025-02-06 04:43:36,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE