./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/bigshot_s.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/bigshot_s.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:12:20,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:12:20,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:12:20,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:12:20,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:12:20,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:12:20,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:12:20,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:12:20,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:12:20,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:12:20,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:12:20,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:12:20,608 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:12:20,609 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:12:20,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:12:20,609 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:12:20,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:12:20,611 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 -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2025-02-06 04:12:20,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:12:20,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:12:20,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:12:20,809 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:12:20,809 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:12:20,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 04:12:21,965 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/396a6d604/7eb2843968074914b4ed352d9f007a53/FLAG1f7e6cf46 [2025-02-06 04:12:22,349 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:12:22,351 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 04:12:22,368 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/396a6d604/7eb2843968074914b4ed352d9f007a53/FLAG1f7e6cf46 [2025-02-06 04:12:22,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/396a6d604/7eb2843968074914b4ed352d9f007a53 [2025-02-06 04:12:22,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:12:22,560 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:12:22,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:12:22,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:12:22,567 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:12:22,568 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:12:22" (1/1) ... [2025-02-06 04:12:22,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c13caa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:22, skipping insertion in model container [2025-02-06 04:12:22,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:12:22" (1/1) ... [2025-02-06 04:12:22,606 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:12:22,908 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/bigshot_s.i[55202,55215] [2025-02-06 04:12:22,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:12:22,935 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:12:22,970 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/bigshot_s.i[55202,55215] [2025-02-06 04:12:22,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:12:23,022 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:12:23,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23 WrapperNode [2025-02-06 04:12:23,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:12:23,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:12:23,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:12:23,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:12:23,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,062 INFO L138 Inliner]: procedures = 322, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2025-02-06 04:12:23,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:12:23,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:12:23,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:12:23,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:12:23,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,090 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-02-06 04:12:23,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,097 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:12:23,110 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:12:23,110 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:12:23,110 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:12:23,111 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (1/1) ... [2025-02-06 04:12:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:12:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:23,137 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 04:12:23,140 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 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 04:12:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:12:23,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:12:23,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 04:12:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:12:23,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:12:23,158 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 04:12:23,248 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:12:23,250 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:12:23,346 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:12:23,346 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:12:23,429 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:12:23,430 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:12:23,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:12:23 BoogieIcfgContainer [2025-02-06 04:12:23,430 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:12:23,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:12:23,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:12:23,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:12:23,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:12:22" (1/3) ... [2025-02-06 04:12:23,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445e251e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:12:23, skipping insertion in model container [2025-02-06 04:12:23,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:23" (2/3) ... [2025-02-06 04:12:23,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445e251e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:12:23, skipping insertion in model container [2025-02-06 04:12:23,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:12:23" (3/3) ... [2025-02-06 04:12:23,437 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-02-06 04:12:23,448 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:12:23,450 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s.i that has 3 procedures, 23 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-06 04:12:23,450 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:12:23,485 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:12:23,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2025-02-06 04:12:23,526 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2025-02-06 04:12:23,527 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:12:23,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-02-06 04:12:23,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2025-02-06 04:12:23,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2025-02-06 04:12:23,539 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:12:23,551 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;@2a7e8d85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:12:23,551 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:12:23,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:12:23,588 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-02-06 04:12:23,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:12:23,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:23,589 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:23,589 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 04:12:23,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1665396123, now seen corresponding path program 1 times [2025-02-06 04:12:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:23,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172564041] [2025-02-06 04:12:23,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:23,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:12:23,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:12:23,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:23,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:23,749 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 04:12:23,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:23,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172564041] [2025-02-06 04:12:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172564041] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:12:23,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:12:23,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:12:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638341849] [2025-02-06 04:12:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:12:23,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:12:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:23,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:12:23,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:12:23,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2025-02-06 04:12:23,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 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 04:12:23,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:23,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2025-02-06 04:12:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:23,852 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2025-02-06 04:12:23,855 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:12:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 4 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 46. Up to 23 conditions per place. [2025-02-06 04:12:23,857 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2025-02-06 04:12:23,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 84 flow [2025-02-06 04:12:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:12:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:12:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2025-02-06 04:12:23,871 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 04:12:23,873 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 39 transitions. [2025-02-06 04:12:23,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 84 flow [2025-02-06 04:12:23,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:12:23,879 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2025-02-06 04:12:23,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-02-06 04:12:23,883 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2025-02-06 04:12:23,884 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2025-02-06 04:12:23,884 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 04:12:23,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:23,885 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 04:12:23,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:12:23,886 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 04:12:23,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -607448329, now seen corresponding path program 1 times [2025-02-06 04:12:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196221923] [2025-02-06 04:12:23,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:23,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:23,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:12:23,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:12:23,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:23,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:24,476 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 04:12:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:24,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196221923] [2025-02-06 04:12:24,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196221923] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:12:24,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:12:24,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:12:24,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227081406] [2025-02-06 04:12:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:12:24,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:12:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:24,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:12:24,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:12:24,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2025-02-06 04:12:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 04:12:24,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:24,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2025-02-06 04:12:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:24,600 INFO L124 PetriNetUnfolderBase]: 12/49 cut-off events. [2025-02-06 04:12:24,601 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:12:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 12/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 4 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 82. Up to 24 conditions per place. [2025-02-06 04:12:24,602 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 17 selfloop transitions, 6 changer transitions 4/30 dead transitions. [2025-02-06 04:12:24,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 121 flow [2025-02-06 04:12:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:12:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:12:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2025-02-06 04:12:24,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2025-02-06 04:12:24,603 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 8 states and 68 transitions. [2025-02-06 04:12:24,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 121 flow [2025-02-06 04:12:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:12:24,605 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 75 flow [2025-02-06 04:12:24,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2025-02-06 04:12:24,606 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-02-06 04:12:24,606 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 75 flow [2025-02-06 04:12:24,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 04:12:24,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:24,607 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:24,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:12:24,608 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 04:12:24,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1563940546, now seen corresponding path program 1 times [2025-02-06 04:12:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:24,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641059340] [2025-02-06 04:12:24,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:24,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 04:12:24,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:12:24,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:24,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641059340] [2025-02-06 04:12:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641059340] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786323071] [2025-02-06 04:12:24,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:24,759 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 04:12:24,760 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 04:12:24,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 04:12:24,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:12:24,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:24,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:24,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 04:12:24,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:24,925 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 15 treesize of output 7 [2025-02-06 04:12:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:24,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786323071] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:24,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 04:12:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751458619] [2025-02-06 04:12:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:24,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 04:12:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:24,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 04:12:24,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-06 04:12:25,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2025-02-06 04:12:25,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 75 flow. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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 04:12:25,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:25,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2025-02-06 04:12:25,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:25,150 INFO L124 PetriNetUnfolderBase]: 14/50 cut-off events. [2025-02-06 04:12:25,150 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 04:12:25,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 50 events. 14/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 6 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 125. Up to 29 conditions per place. [2025-02-06 04:12:25,151 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 19 selfloop transitions, 6 changer transitions 1/29 dead transitions. [2025-02-06 04:12:25,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 145 flow [2025-02-06 04:12:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 04:12:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 04:12:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2025-02-06 04:12:25,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2025-02-06 04:12:25,152 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 75 flow. Second operand 7 states and 76 transitions. [2025-02-06 04:12:25,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 145 flow [2025-02-06 04:12:25,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 04:12:25,153 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2025-02-06 04:12:25,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2025-02-06 04:12:25,154 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2025-02-06 04:12:25,154 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2025-02-06 04:12:25,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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 04:12:25,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:25,154 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:25,161 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 04:12:25,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:25,359 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 04:12:25,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1700123739, now seen corresponding path program 2 times [2025-02-06 04:12:25,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:25,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035556924] [2025-02-06 04:12:25,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:12:25,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:25,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 04:12:25,374 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 04:12:25,374 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:12:25,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:25,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:25,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035556924] [2025-02-06 04:12:25,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035556924] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:25,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572597399] [2025-02-06 04:12:25,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:12:25,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:25,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:25,581 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 04:12:25,582 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 04:12:25,650 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 04:12:25,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 04:12:25,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:12:25,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:25,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 04:12:25,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:25,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 04:12:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:25,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:25,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572597399] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:25,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:25,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2025-02-06 04:12:25,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901287082] [2025-02-06 04:12:25,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:25,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:12:25,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:25,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:12:25,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:12:25,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2025-02-06 04:12:25,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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 04:12:25,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:25,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2025-02-06 04:12:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:26,069 INFO L124 PetriNetUnfolderBase]: 16/56 cut-off events. [2025-02-06 04:12:26,069 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-06 04:12:26,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 56 events. 16/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 6 based on Foata normal form. 2/58 useless extension candidates. Maximal degree in co-relation 150. Up to 29 conditions per place. [2025-02-06 04:12:26,070 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 21 selfloop transitions, 7 changer transitions 1/32 dead transitions. [2025-02-06 04:12:26,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 180 flow [2025-02-06 04:12:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:12:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:12:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2025-02-06 04:12:26,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-02-06 04:12:26,073 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 78 transitions. [2025-02-06 04:12:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 180 flow [2025-02-06 04:12:26,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 168 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 04:12:26,074 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2025-02-06 04:12:26,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2025-02-06 04:12:26,074 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2025-02-06 04:12:26,075 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2025-02-06 04:12:26,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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 04:12:26,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:26,075 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:26,081 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 04:12:26,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:26,278 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 04:12:26,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash -541861320, now seen corresponding path program 3 times [2025-02-06 04:12:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71540747] [2025-02-06 04:12:26,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:12:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:26,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-06 04:12:26,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 04:12:26,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 04:12:26,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71540747] [2025-02-06 04:12:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71540747] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360977871] [2025-02-06 04:12:27,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:12:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:27,079 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 04:12:27,080 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 04:12:27,121 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-06 04:12:27,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 04:12:27,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 04:12:27,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:27,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 04:12:27,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:27,260 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 15 treesize of output 7 [2025-02-06 04:12:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:27,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:27,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360977871] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:27,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2025-02-06 04:12:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074553097] [2025-02-06 04:12:27,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:27,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 04:12:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:27,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 04:12:27,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2025-02-06 04:12:27,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2025-02-06 04:12:27,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 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 04:12:27,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:27,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2025-02-06 04:12:27,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:27,909 INFO L124 PetriNetUnfolderBase]: 17/57 cut-off events. [2025-02-06 04:12:27,910 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-02-06 04:12:27,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 57 events. 17/57 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 5/62 useless extension candidates. Maximal degree in co-relation 174. Up to 15 conditions per place. [2025-02-06 04:12:27,910 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2025-02-06 04:12:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 37 transitions, 226 flow [2025-02-06 04:12:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 04:12:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 04:12:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 99 transitions. [2025-02-06 04:12:27,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25384615384615383 [2025-02-06 04:12:27,911 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 15 states and 99 transitions. [2025-02-06 04:12:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 37 transitions, 226 flow [2025-02-06 04:12:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 206 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-02-06 04:12:27,913 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2025-02-06 04:12:27,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2025-02-06 04:12:27,913 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2025-02-06 04:12:27,913 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2025-02-06 04:12:27,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 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 04:12:27,916 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-02-06 04:12:27,916 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-02-06 04:12:27,916 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-02-06 04:12:27,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 04:12:28,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:28,118 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2025-02-06 04:12:28,120 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:12:28,120 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:12:28,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:12:28 BasicIcfg [2025-02-06 04:12:28,123 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:12:28,124 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:12:28,124 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:12:28,124 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:12:28,124 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:12:23" (3/4) ... [2025-02-06 04:12:28,126 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-06 04:12:28,127 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-06 04:12:28,128 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-06 04:12:28,130 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 37 nodes and edges [2025-02-06 04:12:28,130 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2025-02-06 04:12:28,130 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2025-02-06 04:12:28,130 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-06 04:12:28,130 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-06 04:12:28,175 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:12:28,176 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:12:28,176 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:12:28,176 INFO L158 Benchmark]: Toolchain (without parser) took 5616.66ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 103.0MB in the beginning and 165.3MB in the end (delta: -62.3MB). Peak memory consumption was 133.0MB. Max. memory is 16.1GB. [2025-02-06 04:12:28,176 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 226.5MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 461.40ms. Allocated memory is still 142.6MB. Free memory was 103.0MB in the beginning and 70.7MB in the end (delta: 32.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.52ms. Allocated memory is still 142.6MB. Free memory was 70.7MB in the beginning and 68.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: Boogie Preprocessor took 46.57ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 67.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: IcfgBuilder took 320.13ms. Allocated memory is still 142.6MB. Free memory was 67.1MB in the beginning and 44.6MB in the end (delta: 22.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: TraceAbstraction took 4691.96ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 43.7MB in the beginning and 169.7MB in the end (delta: -125.9MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. [2025-02-06 04:12:28,177 INFO L158 Benchmark]: Witness Printer took 51.82ms. Allocated memory is still 335.5MB. Free memory was 169.7MB in the beginning and 165.3MB in the end (delta: 4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:12:28,179 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 226.5MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 461.40ms. Allocated memory is still 142.6MB. Free memory was 103.0MB in the beginning and 70.7MB in the end (delta: 32.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.52ms. Allocated memory is still 142.6MB. Free memory was 70.7MB in the beginning and 68.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.57ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 67.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 320.13ms. Allocated memory is still 142.6MB. Free memory was 67.1MB in the beginning and 44.6MB in the end (delta: 22.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 4691.96ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 43.7MB in the beginning and 169.7MB in the end (delta: -125.9MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. * Witness Printer took 51.82ms. Allocated memory is still 335.5MB. Free memory was 169.7MB in the beginning and 165.3MB in the end (delta: 4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1107]: 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, 34 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: 4.6s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 201 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 196 mSDsluCounter, 290 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 285 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 853 IncrementalHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 5 mSDtfsCounter, 853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=4, InterpolantAutomatonStates: 41, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 220 ConstructedInterpolants, 0 QuantifiedInterpolants, 1850 SizeOfPredicates, 12 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 0/60 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 04:12:28,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE