./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_unsafe-12.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:13:13,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:13:13,074 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:13:13,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:13:13,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:13:13,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:13:13,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:13:13,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:13:13,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:13:13,093 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:13:13,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:13:13,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:13:13,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:13:13,094 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:13:13,095 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:13:13,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:13:13,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:13:13,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:13:13,096 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 -> 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c [2025-02-06 04:13:13,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:13:13,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:13:13,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:13:13,350 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:13:13,350 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:13:13,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-02-06 04:13:14,414 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f27f6338/7c349641366a40f9aea1c9161940b66a/FLAG9c0f65dfa [2025-02-06 04:13:14,713 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:13:14,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-02-06 04:13:14,721 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f27f6338/7c349641366a40f9aea1c9161940b66a/FLAG9c0f65dfa [2025-02-06 04:13:15,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f27f6338/7c349641366a40f9aea1c9161940b66a [2025-02-06 04:13:15,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:13:15,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:13:15,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:13:15,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:13:15,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:13:15,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@daf51de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15, skipping insertion in model container [2025-02-06 04:13:15,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,061 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:13:15,282 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i[30243,30256] [2025-02-06 04:13:15,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:13:15,308 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:13:15,343 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i[30243,30256] [2025-02-06 04:13:15,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:13:15,366 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:13:15,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15 WrapperNode [2025-02-06 04:13:15,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:13:15,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:13:15,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:13:15,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:13:15,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,402 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-02-06 04:13:15,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:13:15,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:13:15,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:13:15,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:13:15,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,435 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-06 04:13:15,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,443 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:13:15,454 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:13:15,454 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:13:15,454 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:13:15,455 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (1/1) ... [2025-02-06 04:13:15,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:13:15,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:15,495 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 04:13:15,505 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 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-06 04:13:15,521 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-06 04:13:15,521 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:13:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:13:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:13:15,522 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 04:13:15,594 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:13:15,595 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:13:15,708 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:13:15,708 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:13:15,768 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:13:15,768 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:13:15,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:13:15 BoogieIcfgContainer [2025-02-06 04:13:15,769 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:13:15,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:13:15,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:13:15,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:13:15,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:13:15" (1/3) ... [2025-02-06 04:13:15,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecf57b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:13:15, skipping insertion in model container [2025-02-06 04:13:15,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:13:15" (2/3) ... [2025-02-06 04:13:15,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecf57b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:13:15, skipping insertion in model container [2025-02-06 04:13:15,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:13:15" (3/3) ... [2025-02-06 04:13:15,778 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2025-02-06 04:13:15,789 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:13:15,789 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-06 04:13:15,790 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:13:15,828 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:13:15,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-02-06 04:13:15,874 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-02-06 04:13:15,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:13:15,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-02-06 04:13:15,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-02-06 04:13:15,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-02-06 04:13:15,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:13:15,898 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;@5ffdae6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:13:15,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:13:15,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:13:15,907 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-02-06 04:13:15,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:13:15,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:15,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:15,908 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 04:13:15,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash -526820503, now seen corresponding path program 1 times [2025-02-06 04:13:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:15,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532505852] [2025-02-06 04:13:15,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:13:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:15,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:13:16,002 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:13:16,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:13:16,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:16,095 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 04:13:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532505852] [2025-02-06 04:13:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532505852] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:13:16,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:13:16,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:13:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444968687] [2025-02-06 04:13:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:13:16,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:13:16,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:16,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:13:16,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:13:16,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:13:16,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:13:16,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:16,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:13:16,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:16,262 INFO L124 PetriNetUnfolderBase]: 233/411 cut-off events. [2025-02-06 04:13:16,266 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:13:16,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 411 events. 233/411 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1590 event pairs, 39 based on Foata normal form. 16/390 useless extension candidates. Maximal degree in co-relation 766. Up to 257 conditions per place. [2025-02-06 04:13:16,270 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-02-06 04:13:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-02-06 04:13:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:13:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:13:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-02-06 04:13:16,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-02-06 04:13:16,282 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-02-06 04:13:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-02-06 04:13:16,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:13:16,289 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-02-06 04:13:16,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-02-06 04:13:16,295 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-02-06 04:13:16,295 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-02-06 04:13:16,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:13:16,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:16,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:16,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:13:16,296 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 04:13:16,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash 856229523, now seen corresponding path program 1 times [2025-02-06 04:13:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:16,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820259571] [2025-02-06 04:13:16,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:13:16,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:16,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:13:16,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:13:16,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:13:16,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:16,404 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 04:13:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820259571] [2025-02-06 04:13:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820259571] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835291658] [2025-02-06 04:13:16,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:13:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:16,412 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 04:13:16,414 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 04:13:16,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:13:16,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:13:16,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:13:16,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:16,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 04:13:16,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:16,488 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 04:13:16,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:16,512 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 04:13:16,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835291658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:16,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:16,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 04:13:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634694648] [2025-02-06 04:13:16,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:16,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:13:16,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:16,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:13:16,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:13:16,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:13:16,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 04:13:16,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:13:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:16,647 INFO L124 PetriNetUnfolderBase]: 297/507 cut-off events. [2025-02-06 04:13:16,648 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 04:13:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 507 events. 297/507 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1882 event pairs, 39 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 1070. Up to 209 conditions per place. [2025-02-06 04:13:16,651 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-02-06 04:13:16,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-02-06 04:13:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:13:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:13:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-02-06 04:13:16,652 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-02-06 04:13:16,652 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-02-06 04:13:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-02-06 04:13:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:13:16,654 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-02-06 04:13:16,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-02-06 04:13:16,655 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-02-06 04:13:16,655 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-02-06 04:13:16,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 04:13:16,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:16,655 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:16,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:13:16,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:16,856 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 04:13:16,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash -725625367, now seen corresponding path program 2 times [2025-02-06 04:13:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492251976] [2025-02-06 04:13:16,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:13:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:16,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:13:16,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:13:16,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:13:16,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:16,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492251976] [2025-02-06 04:13:16,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492251976] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947196697] [2025-02-06 04:13:16,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:13:16,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:16,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:16,989 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 04:13:16,990 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 04:13:17,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:13:17,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:13:17,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:13:17,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:17,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:13:17,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:17,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947196697] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:17,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-06 04:13:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141944682] [2025-02-06 04:13:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:17,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 04:13:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:17,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 04:13:17,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-06 04:13:17,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:13:17,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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 04:13:17,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:17,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:13:17,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:17,334 INFO L124 PetriNetUnfolderBase]: 489/795 cut-off events. [2025-02-06 04:13:17,334 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-02-06 04:13:17,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 795 events. 489/795 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2899 event pairs, 39 based on Foata normal form. 96/870 useless extension candidates. Maximal degree in co-relation 1998. Up to 209 conditions per place. [2025-02-06 04:13:17,338 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-02-06 04:13:17,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-02-06 04:13:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:13:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:13:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-02-06 04:13:17,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-02-06 04:13:17,339 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-02-06 04:13:17,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-02-06 04:13:17,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 04:13:17,345 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-02-06 04:13:17,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-02-06 04:13:17,346 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-02-06 04:13:17,346 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-02-06 04:13:17,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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 04:13:17,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:17,346 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:17,357 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 04:13:17,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:17,547 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 04:13:17,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1644087895, now seen corresponding path program 3 times [2025-02-06 04:13:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:17,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809073440] [2025-02-06 04:13:17,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:13:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:17,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-02-06 04:13:17,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:13:17,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 04:13:17,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809073440] [2025-02-06 04:13:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809073440] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065886667] [2025-02-06 04:13:17,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:13:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:17,753 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 04:13:17,755 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 04:13:17,788 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-02-06 04:13:17,807 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:13:17,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 04:13:17,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:17,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 04:13:17,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:17,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:18,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065886667] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:18,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:18,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-06 04:13:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600095457] [2025-02-06 04:13:18,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:18,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 04:13:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:18,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 04:13:18,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-06 04:13:18,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:13:18,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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 04:13:18,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:18,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:13:18,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:18,393 INFO L124 PetriNetUnfolderBase]: 873/1371 cut-off events. [2025-02-06 04:13:18,394 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-02-06 04:13:18,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4026 conditions, 1371 events. 873/1371 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4997 event pairs, 39 based on Foata normal form. 192/1542 useless extension candidates. Maximal degree in co-relation 3998. Up to 337 conditions per place. [2025-02-06 04:13:18,400 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-02-06 04:13:18,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-02-06 04:13:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 04:13:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 04:13:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-02-06 04:13:18,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-02-06 04:13:18,402 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-02-06 04:13:18,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-02-06 04:13:18,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-02-06 04:13:18,411 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-02-06 04:13:18,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-02-06 04:13:18,411 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-02-06 04:13:18,411 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-02-06 04:13:18,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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 04:13:18,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:18,412 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:18,417 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 04:13:18,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:18,616 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 04:13:18,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1083933993, now seen corresponding path program 4 times [2025-02-06 04:13:18,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:18,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253571913] [2025-02-06 04:13:18,617 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:13:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:18,628 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-06 04:13:18,646 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 04:13:18,646 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:13:18,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253571913] [2025-02-06 04:13:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253571913] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378624162] [2025-02-06 04:13:19,056 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:13:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:19,058 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 04:13:19,065 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 04:13:19,104 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-06 04:13:19,128 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 04:13:19,128 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:13:19,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:19,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 04:13:19,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:19,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:19,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378624162] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:19,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:19,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-02-06 04:13:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467994639] [2025-02-06 04:13:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:19,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 04:13:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:19,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 04:13:19,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-02-06 04:13:19,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:13:19,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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 04:13:19,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:19,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:13:19,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:19,865 INFO L124 PetriNetUnfolderBase]: 1001/1563 cut-off events. [2025-02-06 04:13:19,866 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-02-06 04:13:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1563 events. 1001/1563 cut-off events. For 16588/16588 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5731 event pairs, 39 based on Foata normal form. 64/1606 useless extension candidates. Maximal degree in co-relation 4766. Up to 305 conditions per place. [2025-02-06 04:13:19,877 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-02-06 04:13:19,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-02-06 04:13:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 04:13:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-06 04:13:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-02-06 04:13:19,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-02-06 04:13:19,880 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-02-06 04:13:19,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-02-06 04:13:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-02-06 04:13:19,900 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-02-06 04:13:19,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2025-02-06 04:13:19,902 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-02-06 04:13:19,902 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-02-06 04:13:19,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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 04:13:19,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:19,903 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:19,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 04:13:20,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:20,104 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 04:13:20,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1340661847, now seen corresponding path program 5 times [2025-02-06 04:13:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:20,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323480493] [2025-02-06 04:13:20,107 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:13:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:20,126 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-02-06 04:13:20,224 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-02-06 04:13:20,224 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-02-06 04:13:20,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:21,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323480493] [2025-02-06 04:13:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323480493] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774278336] [2025-02-06 04:13:21,719 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:13:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:21,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:21,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:13:21,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 04:13:21,768 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-02-06 04:13:21,799 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-02-06 04:13:21,800 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-02-06 04:13:21,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:21,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-02-06 04:13:21,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:23,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774278336] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:25,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:25,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 95 [2025-02-06 04:13:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911626086] [2025-02-06 04:13:25,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:25,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-02-06 04:13:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:25,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-02-06 04:13:25,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=7786, Unknown=0, NotChecked=0, Total=9120 [2025-02-06 04:13:25,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-06 04:13:25,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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 04:13:25,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-06 04:13:25,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:14:11,506 INFO L124 PetriNetUnfolderBase]: 41560/67201 cut-off events. [2025-02-06 04:14:11,507 INFO L125 PetriNetUnfolderBase]: For 240492/240492 co-relation queries the response was YES. [2025-02-06 04:14:11,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183568 conditions, 67201 events. 41560/67201 cut-off events. For 240492/240492 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 456253 event pairs, 679 based on Foata normal form. 0/66621 useless extension candidates. Maximal degree in co-relation 183524. Up to 8745 conditions per place. [2025-02-06 04:14:11,943 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 809 selfloop transitions, 1594 changer transitions 1229/3635 dead transitions. [2025-02-06 04:14:11,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3635 transitions, 24855 flow [2025-02-06 04:14:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-02-06 04:14:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-02-06 04:14:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3516 transitions. [2025-02-06 04:14:11,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699278267842823 [2025-02-06 04:14:11,958 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3516 transitions. [2025-02-06 04:14:11,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3635 transitions, 24855 flow [2025-02-06 04:14:12,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3635 transitions, 20833 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-02-06 04:14:12,619 INFO L231 Difference]: Finished difference. Result has 455 places, 1744 transitions, 10756 flow [2025-02-06 04:14:12,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=10756, PETRI_PLACES=455, PETRI_TRANSITIONS=1744} [2025-02-06 04:14:12,625 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-02-06 04:14:12,625 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1744 transitions, 10756 flow [2025-02-06 04:14:12,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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 04:14:12,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:14:12,626 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:14:12,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 04:14:12,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:14:12,830 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 04:14:12,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:14:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1802806365, now seen corresponding path program 1 times [2025-02-06 04:14:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:14:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147061207] [2025-02-06 04:14:12,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:14:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:14:12,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-06 04:14:12,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 04:14:12,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:14:12,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:14:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:14:14,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:14:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147061207] [2025-02-06 04:14:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147061207] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:14:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437723225] [2025-02-06 04:14:14,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:14:14,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:14:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:14:14,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:14:14,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 04:14:14,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-06 04:14:14,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 04:14:14,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:14:14,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:14:14,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-02-06 04:14:14,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:14:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 300 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:14:16,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:14:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:14:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437723225] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:14:18,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:14:18,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 101 [2025-02-06 04:14:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803153757] [2025-02-06 04:14:18,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:14:18,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-02-06 04:14:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:14:18,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-02-06 04:14:18,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2025-02-06 04:14:18,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-06 04:14:18,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1744 transitions, 10756 flow. Second operand has 102 states, 102 states have (on average 6.215686274509804) internal successors, (634), 102 states have internal predecessors, (634), 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 04:14:18,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:14:18,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-06 04:14:18,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand