./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe024_tso.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-wmm/safe024_tso.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 f830c559346dfed293d38cb3f451f57bf45496349320c2696ae4150a4c0c44e9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:25:35,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:25:35,678 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:25:35,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:25:35,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:25:35,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:25:35,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:25:35,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:25:35,715 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:25:35,715 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:25:35,715 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:25:35,715 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:25:35,715 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:25:35,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:25:35,715 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:25:35,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:25:35,719 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:25:35,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:25:35,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:25:35,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:25:35,720 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 -> f830c559346dfed293d38cb3f451f57bf45496349320c2696ae4150a4c0c44e9 [2025-02-06 04:25:36,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:25:36,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:25:36,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:25:36,041 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:25:36,041 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:25:36,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe024_tso.i [2025-02-06 04:25:37,188 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f18efafe/ef569f0483b6426c955473ecbfe38c2f/FLAGa7f17ed96 [2025-02-06 04:25:37,473 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:25:37,474 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe024_tso.i [2025-02-06 04:25:37,493 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f18efafe/ef569f0483b6426c955473ecbfe38c2f/FLAGa7f17ed96 [2025-02-06 04:25:37,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f18efafe/ef569f0483b6426c955473ecbfe38c2f [2025-02-06 04:25:37,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:25:37,508 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:25:37,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:25:37,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:25:37,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:25:37,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d116ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37, skipping insertion in model container [2025-02-06 04:25:37,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,535 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:25:37,659 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-wmm/safe024_tso.i[945,958] [2025-02-06 04:25:37,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:25:37,769 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:25:37,777 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-wmm/safe024_tso.i[945,958] [2025-02-06 04:25:37,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:25:37,833 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:25:37,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37 WrapperNode [2025-02-06 04:25:37,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:25:37,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:25:37,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:25:37,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:25:37,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,858 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2025-02-06 04:25:37,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:25:37,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:25:37,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:25:37,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:25:37,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,865 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,873 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 04:25:37,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,875 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:25:37,879 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:25:37,879 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:25:37,879 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:25:37,880 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (1/1) ... [2025-02-06 04:25:37,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:25:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:25:37,905 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 04:25:37,907 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 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-02-06 04:25:37,922 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-02-06 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-02-06 04:25:37,922 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-02-06 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-02-06 04:25:37,922 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-02-06 04:25:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:25:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:25:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:25:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:25:37,923 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 04:25:38,023 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:25:38,025 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:25:38,115 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:25:38,115 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:25:38,173 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:25:38,173 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:25:38,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:25:38 BoogieIcfgContainer [2025-02-06 04:25:38,173 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:25:38,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:25:38,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:25:38,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:25:38,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:25:37" (1/3) ... [2025-02-06 04:25:38,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6172f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:25:38, skipping insertion in model container [2025-02-06 04:25:38,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:25:37" (2/3) ... [2025-02-06 04:25:38,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6172f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:25:38, skipping insertion in model container [2025-02-06 04:25:38,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:25:38" (3/3) ... [2025-02-06 04:25:38,183 INFO L128 eAbstractionObserver]: Analyzing ICFG safe024_tso.i [2025-02-06 04:25:38,194 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:25:38,196 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe024_tso.i that has 4 procedures, 39 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-06 04:25:38,196 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:25:38,223 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:25:38,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 39 transitions, 90 flow [2025-02-06 04:25:38,280 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2025-02-06 04:25:38,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:25:38,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 1/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2025-02-06 04:25:38,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 39 transitions, 90 flow [2025-02-06 04:25:38,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2025-02-06 04:25:38,293 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:25:38,300 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;@7affa6a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:25:38,302 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-06 04:25:38,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:25:38,309 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2025-02-06 04:25:38,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:25:38,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:38,310 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:38,310 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:38,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:38,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1827766562, now seen corresponding path program 1 times [2025-02-06 04:25:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:38,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130973496] [2025-02-06 04:25:38,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:25:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:38,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:25:38,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:25:38,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:25:38,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:38,714 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 04:25:38,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:38,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130973496] [2025-02-06 04:25:38,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130973496] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:38,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:38,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:25:38,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885507328] [2025-02-06 04:25:38,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:38,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:25:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:38,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:25:38,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:25:38,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-02-06 04:25:38,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 04:25:38,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:38,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-02-06 04:25:38,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:39,301 INFO L124 PetriNetUnfolderBase]: 3619/5689 cut-off events. [2025-02-06 04:25:39,302 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-02-06 04:25:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11128 conditions, 5689 events. 3619/5689 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 32593 event pairs, 661 based on Foata normal form. 252/5928 useless extension candidates. Maximal degree in co-relation 11117. Up to 2841 conditions per place. [2025-02-06 04:25:39,331 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 57 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2025-02-06 04:25:39,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 277 flow [2025-02-06 04:25:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:25:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:25:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-02-06 04:25:39,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6474358974358975 [2025-02-06 04:25:39,346 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 4 states and 101 transitions. [2025-02-06 04:25:39,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 277 flow [2025-02-06 04:25:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 04:25:39,354 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 106 flow [2025-02-06 04:25:39,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2025-02-06 04:25:39,359 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2025-02-06 04:25:39,359 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 106 flow [2025-02-06 04:25:39,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 04:25:39,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:39,360 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:39,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:25:39,361 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:39,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1359348933, now seen corresponding path program 1 times [2025-02-06 04:25:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740176840] [2025-02-06 04:25:39,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:25:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:39,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 04:25:39,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:25:39,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:25:39,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:39,470 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 04:25:39,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740176840] [2025-02-06 04:25:39,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740176840] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:39,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:39,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:25:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579025753] [2025-02-06 04:25:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:39,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:25:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:39,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:25:39,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:25:39,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-02-06 04:25:39,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 04:25:39,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:39,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-02-06 04:25:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:39,803 INFO L124 PetriNetUnfolderBase]: 2091/3297 cut-off events. [2025-02-06 04:25:39,804 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2025-02-06 04:25:39,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 3297 events. 2091/3297 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 16539 event pairs, 427 based on Foata normal form. 172/3456 useless extension candidates. Maximal degree in co-relation 7545. Up to 1128 conditions per place. [2025-02-06 04:25:39,818 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 73 selfloop transitions, 8 changer transitions 1/87 dead transitions. [2025-02-06 04:25:39,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 393 flow [2025-02-06 04:25:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:25:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:25:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2025-02-06 04:25:39,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6615384615384615 [2025-02-06 04:25:39,820 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 106 flow. Second operand 5 states and 129 transitions. [2025-02-06 04:25:39,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 393 flow [2025-02-06 04:25:39,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 383 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:25:39,823 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 146 flow [2025-02-06 04:25:39,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2025-02-06 04:25:39,824 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2025-02-06 04:25:39,824 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 146 flow [2025-02-06 04:25:39,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 04:25:39,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:39,824 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:39,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:25:39,825 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:39,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -708045828, now seen corresponding path program 1 times [2025-02-06 04:25:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48063231] [2025-02-06 04:25:39,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:25:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:39,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 04:25:39,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 04:25:39,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:25:39,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:39,992 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 04:25:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48063231] [2025-02-06 04:25:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48063231] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:39,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:39,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:25:39,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044308156] [2025-02-06 04:25:39,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:39,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:25:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:39,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:25:39,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:25:39,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-02-06 04:25:39,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:39,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:39,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-02-06 04:25:39,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:40,235 INFO L124 PetriNetUnfolderBase]: 1343/2073 cut-off events. [2025-02-06 04:25:40,235 INFO L125 PetriNetUnfolderBase]: For 1232/1232 co-relation queries the response was YES. [2025-02-06 04:25:40,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 2073 events. 1343/2073 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9272 event pairs, 385 based on Foata normal form. 60/2120 useless extension candidates. Maximal degree in co-relation 5161. Up to 788 conditions per place. [2025-02-06 04:25:40,245 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 61 selfloop transitions, 11 changer transitions 1/78 dead transitions. [2025-02-06 04:25:40,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 380 flow [2025-02-06 04:25:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:25:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:25:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2025-02-06 04:25:40,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2025-02-06 04:25:40,246 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 146 flow. Second operand 6 states and 129 transitions. [2025-02-06 04:25:40,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 380 flow [2025-02-06 04:25:40,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 355 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 04:25:40,258 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 160 flow [2025-02-06 04:25:40,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2025-02-06 04:25:40,260 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2025-02-06 04:25:40,260 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 160 flow [2025-02-06 04:25:40,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:40,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:40,260 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:40,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:25:40,261 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:40,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1954924947, now seen corresponding path program 1 times [2025-02-06 04:25:40,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:40,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6036954] [2025-02-06 04:25:40,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:25:40,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:40,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:25:40,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:25:40,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:25:40,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:40,458 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 04:25:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:40,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6036954] [2025-02-06 04:25:40,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6036954] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:40,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:40,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 04:25:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003682959] [2025-02-06 04:25:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:40,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:25:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:40,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:25:40,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:25:40,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-02-06 04:25:40,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 04:25:40,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:40,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-02-06 04:25:40,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:40,828 INFO L124 PetriNetUnfolderBase]: 1821/2806 cut-off events. [2025-02-06 04:25:40,828 INFO L125 PetriNetUnfolderBase]: For 1974/1974 co-relation queries the response was YES. [2025-02-06 04:25:40,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7193 conditions, 2806 events. 1821/2806 cut-off events. For 1974/1974 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13062 event pairs, 100 based on Foata normal form. 8/2808 useless extension candidates. Maximal degree in co-relation 7178. Up to 1445 conditions per place. [2025-02-06 04:25:40,836 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 53 selfloop transitions, 4 changer transitions 47/108 dead transitions. [2025-02-06 04:25:40,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 108 transitions, 618 flow [2025-02-06 04:25:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:25:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:25:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2025-02-06 04:25:40,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2025-02-06 04:25:40,840 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 160 flow. Second operand 8 states and 155 transitions. [2025-02-06 04:25:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 108 transitions, 618 flow [2025-02-06 04:25:40,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 108 transitions, 489 flow, removed 20 selfloop flow, removed 8 redundant places. [2025-02-06 04:25:40,852 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 136 flow [2025-02-06 04:25:40,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2025-02-06 04:25:40,853 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2025-02-06 04:25:40,853 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 136 flow [2025-02-06 04:25:40,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 04:25:40,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:40,854 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:40,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:25:40,854 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:40,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1331080277, now seen corresponding path program 2 times [2025-02-06 04:25:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:40,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327336901] [2025-02-06 04:25:40,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:25:40,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:40,863 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:25:40,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:25:40,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:25:40,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:40,997 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 04:25:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327336901] [2025-02-06 04:25:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327336901] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:40,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:40,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:25:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229578544] [2025-02-06 04:25:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:40,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:25:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:40,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:25:40,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:25:41,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-02-06 04:25:41,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:41,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:41,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-02-06 04:25:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:41,228 INFO L124 PetriNetUnfolderBase]: 1634/2564 cut-off events. [2025-02-06 04:25:41,229 INFO L125 PetriNetUnfolderBase]: For 808/808 co-relation queries the response was YES. [2025-02-06 04:25:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2564 events. 1634/2564 cut-off events. For 808/808 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12206 event pairs, 452 based on Foata normal form. 8/2571 useless extension candidates. Maximal degree in co-relation 5953. Up to 1444 conditions per place. [2025-02-06 04:25:41,236 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 38 selfloop transitions, 1 changer transitions 46/89 dead transitions. [2025-02-06 04:25:41,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 452 flow [2025-02-06 04:25:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:25:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:25:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2025-02-06 04:25:41,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2025-02-06 04:25:41,241 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 136 flow. Second operand 6 states and 118 transitions. [2025-02-06 04:25:41,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 452 flow [2025-02-06 04:25:41,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 89 transitions, 436 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 04:25:41,243 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 128 flow [2025-02-06 04:25:41,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2025-02-06 04:25:41,243 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2025-02-06 04:25:41,243 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 128 flow [2025-02-06 04:25:41,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:41,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:25:41,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:25:41,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:25:41,245 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 04:25:41,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:25:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1906868553, now seen corresponding path program 3 times [2025-02-06 04:25:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:25:41,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088675162] [2025-02-06 04:25:41,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:25:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:25:41,251 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:25:41,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:25:41,255 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:25:41,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:25:41,357 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 04:25:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:25:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088675162] [2025-02-06 04:25:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088675162] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:25:41,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:25:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:25:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7795091] [2025-02-06 04:25:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:25:41,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:25:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:25:41,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:25:41,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:25:41,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-02-06 04:25:41,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:41,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:25:41,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-02-06 04:25:41,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:25:41,496 INFO L124 PetriNetUnfolderBase]: 790/1275 cut-off events. [2025-02-06 04:25:41,496 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2025-02-06 04:25:41,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 1275 events. 790/1275 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5568 event pairs, 234 based on Foata normal form. 8/1280 useless extension candidates. Maximal degree in co-relation 2970. Up to 856 conditions per place. [2025-02-06 04:25:41,499 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2025-02-06 04:25:41,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 275 flow [2025-02-06 04:25:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:25:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:25:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2025-02-06 04:25:41,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2025-02-06 04:25:41,500 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 128 flow. Second operand 6 states and 93 transitions. [2025-02-06 04:25:41,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 275 flow [2025-02-06 04:25:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 267 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 04:25:41,501 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2025-02-06 04:25:41,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2025-02-06 04:25:41,502 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2025-02-06 04:25:41,503 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2025-02-06 04:25:41,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 04:25:41,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-02-06 04:25:41,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-02-06 04:25:41,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-02-06 04:25:41,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-02-06 04:25:41,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:25:41,506 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2025-02-06 04:25:41,508 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:25:41,508 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:25:41,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:25:41 BasicIcfg [2025-02-06 04:25:41,513 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:25:41,514 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:25:41,514 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:25:41,514 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:25:41,515 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:25:38" (3/4) ... [2025-02-06 04:25:41,516 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-06 04:25:41,518 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P0 [2025-02-06 04:25:41,519 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P1 [2025-02-06 04:25:41,519 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P2 [2025-02-06 04:25:41,521 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2025-02-06 04:25:41,521 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2025-02-06 04:25:41,521 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-02-06 04:25:41,521 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-02-06 04:25:41,574 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:25:41,575 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:25:41,575 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:25:41,576 INFO L158 Benchmark]: Toolchain (without parser) took 4067.58ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 104.4MB in the beginning and 132.9MB in the end (delta: -28.5MB). Peak memory consumption was 232.0MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,576 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:25:41,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.21ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 83.8MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,577 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.29ms. Allocated memory is still 142.6MB. Free memory was 83.8MB in the beginning and 81.8MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,578 INFO L158 Benchmark]: Boogie Preprocessor took 20.00ms. Allocated memory is still 142.6MB. Free memory was 81.8MB in the beginning and 80.9MB in the end (delta: 912.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:25:41,578 INFO L158 Benchmark]: IcfgBuilder took 294.54ms. Allocated memory is still 142.6MB. Free memory was 80.9MB in the beginning and 61.4MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,578 INFO L158 Benchmark]: TraceAbstraction took 3338.06ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 60.4MB in the beginning and 137.2MB in the end (delta: -76.8MB). Peak memory consumption was 181.7MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,578 INFO L158 Benchmark]: Witness Printer took 61.27ms. Allocated memory is still 402.7MB. Free memory was 137.2MB in the beginning and 132.9MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:25:41,579 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.21ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 83.8MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.29ms. Allocated memory is still 142.6MB. Free memory was 83.8MB in the beginning and 81.8MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.00ms. Allocated memory is still 142.6MB. Free memory was 81.8MB in the beginning and 80.9MB in the end (delta: 912.5kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 294.54ms. Allocated memory is still 142.6MB. Free memory was 80.9MB in the beginning and 61.4MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3338.06ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 60.4MB in the beginning and 137.2MB in the end (delta: -76.8MB). Peak memory consumption was 181.7MB. Max. memory is 16.1GB. * Witness Printer took 61.27ms. Allocated memory is still 402.7MB. Free memory was 137.2MB in the beginning and 132.9MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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 7 procedures, 64 locations, 4 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: 3.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 415 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 408 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 894 IncrementalHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 4 mSDtfsCounter, 894 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=3, InterpolantAutomatonStates: 35, 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, 0.9s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 497 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 04:25:41,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE