./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:31:15,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:31:15,892 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:31:15,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:31:15,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:31:15,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:31:15,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:31:15,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:31:15,922 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:31:15,923 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:31:15,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:31:15,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:31:15,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:31:15,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:31:15,924 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:31:15,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:31:15,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:31:15,925 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:31:15,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:31:15,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:31:15,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:31:15,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:31:15,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:31:15,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:31:15,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:31:15,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:31:15,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:15,930 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:31:15,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:31:15,931 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:31:15,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:31:15,932 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2024-10-11 14:31:16,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:31:16,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:31:16,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:31:16,145 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:31:16,146 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:31:16,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2024-10-11 14:31:17,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:31:17,515 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:31:17,516 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2024-10-11 14:31:17,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/04107a8f4/088fba200fe648a5a19a90ea5f4f15fb/FLAG1a8674938 [2024-10-11 14:31:17,537 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/04107a8f4/088fba200fe648a5a19a90ea5f4f15fb [2024-10-11 14:31:17,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:31:17,541 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:31:17,542 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:17,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:31:17,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:31:17,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b58da5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17, skipping insertion in model container [2024-10-11 14:31:17,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:31:17,726 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-10-11 14:31:17,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:17,735 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:31:17,747 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-10-11 14:31:17,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:17,767 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:31:17,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17 WrapperNode [2024-10-11 14:31:17,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:17,770 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:17,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:31:17,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:31:17,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,780 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,797 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-10-11 14:31:17,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:17,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:31:17,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:31:17,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:31:17,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,829 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,859 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]. [2024-10-11 14:31:17,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,863 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:31:17,873 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:31:17,873 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:31:17,873 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:31:17,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (1/1) ... [2024-10-11 14:31:17,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:17,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:17,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:31:17,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:31:17,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:31:17,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:31:17,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:31:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:31:17,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:31:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:31:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:31:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:31:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:31:17,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:31:17,939 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:31:18,003 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:31:18,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:31:18,150 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:31:18,150 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:31:18,265 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:31:18,266 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:31:18,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:18 BoogieIcfgContainer [2024-10-11 14:31:18,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:31:18,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:31:18,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:31:18,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:31:18,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:17" (1/3) ... [2024-10-11 14:31:18,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209c4385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:18, skipping insertion in model container [2024-10-11 14:31:18,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:17" (2/3) ... [2024-10-11 14:31:18,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209c4385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:18, skipping insertion in model container [2024-10-11 14:31:18,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:18" (3/3) ... [2024-10-11 14:31:18,274 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-10-11 14:31:18,286 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:31:18,286 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:31:18,286 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:31:18,310 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:31:18,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-11 14:31:18,358 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-11 14:31:18,359 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:18,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-11 14:31:18,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-11 14:31:18,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-11 14:31:18,376 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:31:18,382 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;@e6d4283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:31:18,382 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:31:18,394 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:31:18,395 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-11 14:31:18,395 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:18,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:18,396 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:18,396 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:18,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 570217615, now seen corresponding path program 1 times [2024-10-11 14:31:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647048048] [2024-10-11 14:31:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647048048] [2024-10-11 14:31:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647048048] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:18,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:18,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035856730] [2024-10-11 14:31:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:18,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:19,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:19,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:19,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:19,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:19,139 INFO L124 PetriNetUnfolderBase]: 78/172 cut-off events. [2024-10-11 14:31:19,139 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-10-11 14:31:19,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 172 events. 78/172 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 600 event pairs, 21 based on Foata normal form. 8/179 useless extension candidates. Maximal degree in co-relation 289. Up to 93 conditions per place. [2024-10-11 14:31:19,142 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 30 selfloop transitions, 8 changer transitions 4/45 dead transitions. [2024-10-11 14:31:19,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 207 flow [2024-10-11 14:31:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-10-11 14:31:19,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-10-11 14:31:19,153 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 7 states and 79 transitions. [2024-10-11 14:31:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 207 flow [2024-10-11 14:31:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:19,157 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 97 flow [2024-10-11 14:31:19,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-10-11 14:31:19,162 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2024-10-11 14:31:19,163 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 97 flow [2024-10-11 14:31:19,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:19,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:19,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:31:19,164 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:19,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1057667961, now seen corresponding path program 2 times [2024-10-11 14:31:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:19,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922413259] [2024-10-11 14:31:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:19,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922413259] [2024-10-11 14:31:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922413259] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:19,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301735426] [2024-10-11 14:31:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:19,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:19,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:19,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:19,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:19,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:19,500 INFO L124 PetriNetUnfolderBase]: 78/178 cut-off events. [2024-10-11 14:31:19,500 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-10-11 14:31:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 178 events. 78/178 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 672 event pairs, 17 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 446. Up to 93 conditions per place. [2024-10-11 14:31:19,502 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 8 changer transitions 9/49 dead transitions. [2024-10-11 14:31:19,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 267 flow [2024-10-11 14:31:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-10-11 14:31:19,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-10-11 14:31:19,505 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 97 flow. Second operand 7 states and 78 transitions. [2024-10-11 14:31:19,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 267 flow [2024-10-11 14:31:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 263 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:19,509 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 131 flow [2024-10-11 14:31:19,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-10-11 14:31:19,511 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 15 predicate places. [2024-10-11 14:31:19,511 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 131 flow [2024-10-11 14:31:19,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:19,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:19,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:31:19,511 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:19,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash -62739223, now seen corresponding path program 3 times [2024-10-11 14:31:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:19,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975486513] [2024-10-11 14:31:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975486513] [2024-10-11 14:31:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975486513] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:19,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:19,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192775672] [2024-10-11 14:31:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:19,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:19,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:19,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:19,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:19,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:19,853 INFO L124 PetriNetUnfolderBase]: 81/178 cut-off events. [2024-10-11 14:31:19,854 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-10-11 14:31:19,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 178 events. 81/178 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 25 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 538. Up to 97 conditions per place. [2024-10-11 14:31:19,856 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 12 changer transitions 4/47 dead transitions. [2024-10-11 14:31:19,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 308 flow [2024-10-11 14:31:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-11 14:31:19,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:19,858 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 131 flow. Second operand 7 states and 77 transitions. [2024-10-11 14:31:19,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 308 flow [2024-10-11 14:31:19,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:19,860 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 194 flow [2024-10-11 14:31:19,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-10-11 14:31:19,861 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2024-10-11 14:31:19,861 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 194 flow [2024-10-11 14:31:19,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:19,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:19,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:19,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:31:19,862 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:19,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -917885125, now seen corresponding path program 4 times [2024-10-11 14:31:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733210336] [2024-10-11 14:31:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733210336] [2024-10-11 14:31:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733210336] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:20,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:20,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264139801] [2024-10-11 14:31:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:20,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:20,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:20,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:20,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:20,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:20,132 INFO L124 PetriNetUnfolderBase]: 79/178 cut-off events. [2024-10-11 14:31:20,132 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-10-11 14:31:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 178 events. 79/178 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 23 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 567. Up to 97 conditions per place. [2024-10-11 14:31:20,133 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 14 changer transitions 5/50 dead transitions. [2024-10-11 14:31:20,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 368 flow [2024-10-11 14:31:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-11 14:31:20,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:20,134 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 194 flow. Second operand 7 states and 77 transitions. [2024-10-11 14:31:20,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 368 flow [2024-10-11 14:31:20,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 346 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:20,137 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 241 flow [2024-10-11 14:31:20,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-10-11 14:31:20,137 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-10-11 14:31:20,138 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 241 flow [2024-10-11 14:31:20,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:20,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:20,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:31:20,138 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:20,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash -910085405, now seen corresponding path program 5 times [2024-10-11 14:31:20,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:20,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13170671] [2024-10-11 14:31:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:20,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13170671] [2024-10-11 14:31:20,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13170671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:20,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:20,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617742873] [2024-10-11 14:31:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:20,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:20,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:20,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:20,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:20,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:20,366 INFO L124 PetriNetUnfolderBase]: 76/174 cut-off events. [2024-10-11 14:31:20,366 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2024-10-11 14:31:20,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 174 events. 76/174 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 event pairs, 20 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 578. Up to 97 conditions per place. [2024-10-11 14:31:20,367 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 27 selfloop transitions, 13 changer transitions 7/50 dead transitions. [2024-10-11 14:31:20,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 384 flow [2024-10-11 14:31:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-11 14:31:20,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:20,369 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 241 flow. Second operand 7 states and 77 transitions. [2024-10-11 14:31:20,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 384 flow [2024-10-11 14:31:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 327 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-10-11 14:31:20,371 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 211 flow [2024-10-11 14:31:20,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-10-11 14:31:20,372 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-10-11 14:31:20,372 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 211 flow [2024-10-11 14:31:20,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:20,372 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:20,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:31:20,373 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:20,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -201267373, now seen corresponding path program 6 times [2024-10-11 14:31:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030943873] [2024-10-11 14:31:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030943873] [2024-10-11 14:31:20,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030943873] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:20,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:20,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:20,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129836285] [2024-10-11 14:31:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:20,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:20,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:20,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:20,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:20,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:20,613 INFO L124 PetriNetUnfolderBase]: 73/159 cut-off events. [2024-10-11 14:31:20,613 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2024-10-11 14:31:20,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 159 events. 73/159 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 22 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 513. Up to 97 conditions per place. [2024-10-11 14:31:20,614 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 21 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2024-10-11 14:31:20,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 328 flow [2024-10-11 14:31:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-10-11 14:31:20,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-10-11 14:31:20,617 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 211 flow. Second operand 7 states and 71 transitions. [2024-10-11 14:31:20,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 328 flow [2024-10-11 14:31:20,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-11 14:31:20,619 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 200 flow [2024-10-11 14:31:20,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-10-11 14:31:20,619 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2024-10-11 14:31:20,620 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 200 flow [2024-10-11 14:31:20,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:20,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:20,620 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:20,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:31:20,621 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:20,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:20,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1917961257, now seen corresponding path program 1 times [2024-10-11 14:31:20,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:20,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922687203] [2024-10-11 14:31:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:20,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922687203] [2024-10-11 14:31:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922687203] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507295218] [2024-10-11 14:31:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:20,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:20,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:20,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:31:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:20,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:20,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:21,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507295218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:21,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:31:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488223383] [2024-10-11 14:31:21,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:21,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:31:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:31:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:31:21,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:21,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 200 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:21,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:21,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:21,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:22,142 INFO L124 PetriNetUnfolderBase]: 363/692 cut-off events. [2024-10-11 14:31:22,143 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-10-11 14:31:22,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 692 events. 363/692 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3104 event pairs, 14 based on Foata normal form. 17/709 useless extension candidates. Maximal degree in co-relation 1801. Up to 146 conditions per place. [2024-10-11 14:31:22,146 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 78 changer transitions 16/224 dead transitions. [2024-10-11 14:31:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 224 transitions, 1241 flow [2024-10-11 14:31:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 14:31:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-10-11 14:31:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 338 transitions. [2024-10-11 14:31:22,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-10-11 14:31:22,149 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 200 flow. Second operand 40 states and 338 transitions. [2024-10-11 14:31:22,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 224 transitions, 1241 flow [2024-10-11 14:31:22,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 224 transitions, 1189 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 14:31:22,153 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 613 flow [2024-10-11 14:31:22,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=613, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-10-11 14:31:22,153 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 59 predicate places. [2024-10-11 14:31:22,153 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 613 flow [2024-10-11 14:31:22,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:22,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:22,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:22,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:31:22,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:22,355 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:22,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1087897233, now seen corresponding path program 2 times [2024-10-11 14:31:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893558320] [2024-10-11 14:31:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:22,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893558320] [2024-10-11 14:31:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893558320] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809924134] [2024-10-11 14:31:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:22,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:22,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:22,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:31:22,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:22,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:22,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:22,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:22,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809924134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:22,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:22,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:31:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275349327] [2024-10-11 14:31:22,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:22,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:31:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:31:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:31:22,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:22,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 613 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:22,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:22,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:23,548 INFO L124 PetriNetUnfolderBase]: 465/885 cut-off events. [2024-10-11 14:31:23,548 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-10-11 14:31:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3022 conditions, 885 events. 465/885 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4326 event pairs, 26 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 2962. Up to 393 conditions per place. [2024-10-11 14:31:23,552 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 115 selfloop transitions, 119 changer transitions 9/244 dead transitions. [2024-10-11 14:31:23,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 244 transitions, 1718 flow [2024-10-11 14:31:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 14:31:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-11 14:31:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 283 transitions. [2024-10-11 14:31:23,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36753246753246754 [2024-10-11 14:31:23,554 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 613 flow. Second operand 35 states and 283 transitions. [2024-10-11 14:31:23,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 244 transitions, 1718 flow [2024-10-11 14:31:23,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 244 transitions, 1575 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:23,562 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1170 flow [2024-10-11 14:31:23,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1170, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-10-11 14:31:23,563 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 95 predicate places. [2024-10-11 14:31:23,563 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1170 flow [2024-10-11 14:31:23,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:23,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:23,564 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:23,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:23,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:23,768 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:23,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1950934285, now seen corresponding path program 3 times [2024-10-11 14:31:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464536455] [2024-10-11 14:31:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:23,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:23,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464536455] [2024-10-11 14:31:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464536455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:23,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430539059] [2024-10-11 14:31:23,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:23,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:23,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:31:23,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:31:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:23,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:23,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:24,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430539059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:24,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:31:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181237703] [2024-10-11 14:31:24,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:24,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:31:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:31:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:31:24,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:24,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:24,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:24,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:25,725 INFO L124 PetriNetUnfolderBase]: 728/1389 cut-off events. [2024-10-11 14:31:25,726 INFO L125 PetriNetUnfolderBase]: For 2882/2882 co-relation queries the response was YES. [2024-10-11 14:31:25,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1389 events. 728/1389 cut-off events. For 2882/2882 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7646 event pairs, 22 based on Foata normal form. 2/1389 useless extension candidates. Maximal degree in co-relation 5513. Up to 254 conditions per place. [2024-10-11 14:31:25,734 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 183 selfloop transitions, 242 changer transitions 11/437 dead transitions. [2024-10-11 14:31:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 437 transitions, 3579 flow [2024-10-11 14:31:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-11 14:31:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-11 14:31:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 509 transitions. [2024-10-11 14:31:25,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3615056818181818 [2024-10-11 14:31:25,736 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1170 flow. Second operand 64 states and 509 transitions. [2024-10-11 14:31:25,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 437 transitions, 3579 flow [2024-10-11 14:31:25,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 437 transitions, 3502 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-10-11 14:31:25,756 INFO L231 Difference]: Finished difference. Result has 191 places, 280 transitions, 2690 flow [2024-10-11 14:31:25,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2690, PETRI_PLACES=191, PETRI_TRANSITIONS=280} [2024-10-11 14:31:25,757 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 167 predicate places. [2024-10-11 14:31:25,757 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 280 transitions, 2690 flow [2024-10-11 14:31:25,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:25,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:25,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:25,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:25,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:25,962 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:25,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1818662245, now seen corresponding path program 4 times [2024-10-11 14:31:25,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:25,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301375918] [2024-10-11 14:31:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:25,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301375918] [2024-10-11 14:31:26,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301375918] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107930432] [2024-10-11 14:31:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:26,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:26,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:26,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:31:26,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:31:26,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:26,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:26,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:26,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:26,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107930432] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:26,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:26,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:31:26,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770055711] [2024-10-11 14:31:26,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:26,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:31:26,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:31:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:31:26,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:26,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 280 transitions, 2690 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-10-11 14:31:26,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:26,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:26,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:27,998 INFO L124 PetriNetUnfolderBase]: 991/1844 cut-off events. [2024-10-11 14:31:27,999 INFO L125 PetriNetUnfolderBase]: For 14220/14220 co-relation queries the response was YES. [2024-10-11 14:31:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10042 conditions, 1844 events. 991/1844 cut-off events. For 14220/14220 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10429 event pairs, 29 based on Foata normal form. 2/1842 useless extension candidates. Maximal degree in co-relation 9731. Up to 351 conditions per place. [2024-10-11 14:31:28,010 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 191 selfloop transitions, 335 changer transitions 10/537 dead transitions. [2024-10-11 14:31:28,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 5738 flow [2024-10-11 14:31:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-11 14:31:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-11 14:31:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 523 transitions. [2024-10-11 14:31:28,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37144886363636365 [2024-10-11 14:31:28,014 INFO L175 Difference]: Start difference. First operand has 191 places, 280 transitions, 2690 flow. Second operand 64 states and 523 transitions. [2024-10-11 14:31:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 5738 flow [2024-10-11 14:31:28,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 537 transitions, 5418 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-10-11 14:31:28,066 INFO L231 Difference]: Finished difference. Result has 253 places, 383 transitions, 4190 flow [2024-10-11 14:31:28,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4190, PETRI_PLACES=253, PETRI_TRANSITIONS=383} [2024-10-11 14:31:28,067 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 229 predicate places. [2024-10-11 14:31:28,067 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 383 transitions, 4190 flow [2024-10-11 14:31:28,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-10-11 14:31:28,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:28,068 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:28,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:31:28,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:31:28,269 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:28,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1703561549, now seen corresponding path program 5 times [2024-10-11 14:31:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:28,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732437141] [2024-10-11 14:31:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732437141] [2024-10-11 14:31:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732437141] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886170482] [2024-10-11 14:31:28,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:31:28,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:28,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:28,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:28,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:31:28,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:28,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:28,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:28,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:28,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886170482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:28,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:28,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:31:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413509890] [2024-10-11 14:31:28,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:28,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:31:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:31:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:31:28,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:28,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 383 transitions, 4190 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:28,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:28,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:28,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:29,062 INFO L124 PetriNetUnfolderBase]: 1001/1870 cut-off events. [2024-10-11 14:31:29,062 INFO L125 PetriNetUnfolderBase]: For 17915/17915 co-relation queries the response was YES. [2024-10-11 14:31:29,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11523 conditions, 1870 events. 1001/1870 cut-off events. For 17915/17915 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10655 event pairs, 73 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 11189. Up to 1184 conditions per place. [2024-10-11 14:31:29,075 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 179 selfloop transitions, 246 changer transitions 8/434 dead transitions. [2024-10-11 14:31:29,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 5421 flow [2024-10-11 14:31:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:31:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:31:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 147 transitions. [2024-10-11 14:31:29,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35167464114832536 [2024-10-11 14:31:29,079 INFO L175 Difference]: Start difference. First operand has 253 places, 383 transitions, 4190 flow. Second operand 19 states and 147 transitions. [2024-10-11 14:31:29,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 5421 flow [2024-10-11 14:31:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 434 transitions, 5104 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-10-11 14:31:29,137 INFO L231 Difference]: Finished difference. Result has 254 places, 395 transitions, 4878 flow [2024-10-11 14:31:29,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4878, PETRI_PLACES=254, PETRI_TRANSITIONS=395} [2024-10-11 14:31:29,138 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 230 predicate places. [2024-10-11 14:31:29,139 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 395 transitions, 4878 flow [2024-10-11 14:31:29,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:29,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:29,139 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:29,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:31:29,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:31:29,344 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:29,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -442609211, now seen corresponding path program 6 times [2024-10-11 14:31:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816988444] [2024-10-11 14:31:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816988444] [2024-10-11 14:31:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816988444] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439574805] [2024-10-11 14:31:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:31:29,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:29,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:29,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:31:29,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:31:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:29,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:29,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:29,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:29,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439574805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:29,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:29,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756181259] [2024-10-11 14:31:29,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:29,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:29,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:29,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 395 transitions, 4878 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:29,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:29,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:29,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:30,332 INFO L124 PetriNetUnfolderBase]: 1016/1903 cut-off events. [2024-10-11 14:31:30,332 INFO L125 PetriNetUnfolderBase]: For 15584/15584 co-relation queries the response was YES. [2024-10-11 14:31:30,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12226 conditions, 1903 events. 1016/1903 cut-off events. For 15584/15584 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10896 event pairs, 84 based on Foata normal form. 2/1905 useless extension candidates. Maximal degree in co-relation 12164. Up to 1240 conditions per place. [2024-10-11 14:31:30,347 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 189 selfloop transitions, 252 changer transitions 8/450 dead transitions. [2024-10-11 14:31:30,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 450 transitions, 6125 flow [2024-10-11 14:31:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:31:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:31:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 177 transitions. [2024-10-11 14:31:30,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2024-10-11 14:31:30,349 INFO L175 Difference]: Start difference. First operand has 254 places, 395 transitions, 4878 flow. Second operand 24 states and 177 transitions. [2024-10-11 14:31:30,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 450 transitions, 6125 flow [2024-10-11 14:31:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 450 transitions, 6057 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-11 14:31:30,410 INFO L231 Difference]: Finished difference. Result has 277 places, 406 transitions, 5786 flow [2024-10-11 14:31:30,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5786, PETRI_PLACES=277, PETRI_TRANSITIONS=406} [2024-10-11 14:31:30,412 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 253 predicate places. [2024-10-11 14:31:30,412 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 406 transitions, 5786 flow [2024-10-11 14:31:30,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:30,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:30,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:30,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:30,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:31:30,618 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:30,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -269361519, now seen corresponding path program 7 times [2024-10-11 14:31:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85715709] [2024-10-11 14:31:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:30,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:30,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85715709] [2024-10-11 14:31:30,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85715709] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:30,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141872209] [2024-10-11 14:31:30,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:31:30,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:30,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:30,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:30,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:31:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:30,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:30,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:30,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141872209] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:31,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550285217] [2024-10-11 14:31:31,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:31,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:31,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:31,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 406 transitions, 5786 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:31,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:31,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:31,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:31,472 INFO L124 PetriNetUnfolderBase]: 1037/1958 cut-off events. [2024-10-11 14:31:31,473 INFO L125 PetriNetUnfolderBase]: For 19215/19215 co-relation queries the response was YES. [2024-10-11 14:31:31,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13680 conditions, 1958 events. 1037/1958 cut-off events. For 19215/19215 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11422 event pairs, 84 based on Foata normal form. 2/1960 useless extension candidates. Maximal degree in co-relation 13613. Up to 1317 conditions per place. [2024-10-11 14:31:31,509 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 193 selfloop transitions, 257 changer transitions 8/459 dead transitions. [2024-10-11 14:31:31,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 7128 flow [2024-10-11 14:31:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:31:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:31:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 158 transitions. [2024-10-11 14:31:31,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-10-11 14:31:31,511 INFO L175 Difference]: Start difference. First operand has 277 places, 406 transitions, 5786 flow. Second operand 21 states and 158 transitions. [2024-10-11 14:31:31,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 7128 flow [2024-10-11 14:31:31,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 459 transitions, 7060 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-10-11 14:31:31,583 INFO L231 Difference]: Finished difference. Result has 291 places, 422 transitions, 6954 flow [2024-10-11 14:31:31,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6954, PETRI_PLACES=291, PETRI_TRANSITIONS=422} [2024-10-11 14:31:31,584 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 267 predicate places. [2024-10-11 14:31:31,584 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 422 transitions, 6954 flow [2024-10-11 14:31:31,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:31,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:31,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:31,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:31:31,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:31,789 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:31,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 318383803, now seen corresponding path program 8 times [2024-10-11 14:31:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294419543] [2024-10-11 14:31:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:31,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:31,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:31,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294419543] [2024-10-11 14:31:31,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294419543] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:31,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696963241] [2024-10-11 14:31:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:31,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:31,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:31,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:31:31,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:31,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:31,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:32,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696963241] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:32,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525672982] [2024-10-11 14:31:32,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:32,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:32,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:32,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 422 transitions, 6954 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:32,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:32,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:32,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:32,802 INFO L124 PetriNetUnfolderBase]: 1043/1976 cut-off events. [2024-10-11 14:31:32,802 INFO L125 PetriNetUnfolderBase]: For 23675/23675 co-relation queries the response was YES. [2024-10-11 14:31:32,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15142 conditions, 1976 events. 1043/1976 cut-off events. For 23675/23675 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11558 event pairs, 85 based on Foata normal form. 2/1978 useless extension candidates. Maximal degree in co-relation 15070. Up to 1218 conditions per place. [2024-10-11 14:31:32,815 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 171 selfloop transitions, 293 changer transitions 8/473 dead transitions. [2024-10-11 14:31:32,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 8237 flow [2024-10-11 14:31:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:31:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:31:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 191 transitions. [2024-10-11 14:31:32,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32154882154882153 [2024-10-11 14:31:32,816 INFO L175 Difference]: Start difference. First operand has 291 places, 422 transitions, 6954 flow. Second operand 27 states and 191 transitions. [2024-10-11 14:31:32,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 8237 flow [2024-10-11 14:31:32,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 473 transitions, 8128 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-10-11 14:31:32,952 INFO L231 Difference]: Finished difference. Result has 309 places, 432 transitions, 7906 flow [2024-10-11 14:31:32,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7906, PETRI_PLACES=309, PETRI_TRANSITIONS=432} [2024-10-11 14:31:32,953 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 285 predicate places. [2024-10-11 14:31:32,953 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 432 transitions, 7906 flow [2024-10-11 14:31:32,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:32,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:32,954 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:32,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:31:33,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:31:33,154 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:33,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1289931379, now seen corresponding path program 9 times [2024-10-11 14:31:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513874104] [2024-10-11 14:31:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513874104] [2024-10-11 14:31:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513874104] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829086952] [2024-10-11 14:31:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:33,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:33,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:31:33,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:31:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:33,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:33,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:33,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829086952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:33,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:33,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143993365] [2024-10-11 14:31:33,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:33,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:33,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:33,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 432 transitions, 7906 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:33,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:33,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:33,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:34,037 INFO L124 PetriNetUnfolderBase]: 1048/1991 cut-off events. [2024-10-11 14:31:34,038 INFO L125 PetriNetUnfolderBase]: For 29199/29199 co-relation queries the response was YES. [2024-10-11 14:31:34,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16401 conditions, 1991 events. 1048/1991 cut-off events. For 29199/29199 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11717 event pairs, 90 based on Foata normal form. 2/1993 useless extension candidates. Maximal degree in co-relation 16324. Up to 1228 conditions per place. [2024-10-11 14:31:34,051 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 194 selfloop transitions, 266 changer transitions 8/469 dead transitions. [2024-10-11 14:31:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 469 transitions, 9121 flow [2024-10-11 14:31:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:31:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:31:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 141 transitions. [2024-10-11 14:31:34,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3373205741626794 [2024-10-11 14:31:34,053 INFO L175 Difference]: Start difference. First operand has 309 places, 432 transitions, 7906 flow. Second operand 19 states and 141 transitions. [2024-10-11 14:31:34,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 469 transitions, 9121 flow [2024-10-11 14:31:34,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 469 transitions, 8888 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-10-11 14:31:34,164 INFO L231 Difference]: Finished difference. Result has 318 places, 437 transitions, 8641 flow [2024-10-11 14:31:34,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7673, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8641, PETRI_PLACES=318, PETRI_TRANSITIONS=437} [2024-10-11 14:31:34,165 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 294 predicate places. [2024-10-11 14:31:34,165 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 437 transitions, 8641 flow [2024-10-11 14:31:34,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:34,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:34,165 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:34,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:34,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:34,366 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:34,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1696274949, now seen corresponding path program 10 times [2024-10-11 14:31:34,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:34,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797641624] [2024-10-11 14:31:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797641624] [2024-10-11 14:31:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797641624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851276480] [2024-10-11 14:31:34,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:34,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:34,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:31:34,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:31:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:34,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:34,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:34,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:34,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851276480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:34,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:34,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:34,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60494513] [2024-10-11 14:31:34,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:34,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:34,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:34,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 437 transitions, 8641 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:34,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:34,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:34,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:36,267 INFO L124 PetriNetUnfolderBase]: 1354/2540 cut-off events. [2024-10-11 14:31:36,267 INFO L125 PetriNetUnfolderBase]: For 47723/47723 co-relation queries the response was YES. [2024-10-11 14:31:36,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 2540 events. 1354/2540 cut-off events. For 47723/47723 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15579 event pairs, 80 based on Foata normal form. 3/2543 useless extension candidates. Maximal degree in co-relation 22112. Up to 971 conditions per place. [2024-10-11 14:31:36,284 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 253 selfloop transitions, 437 changer transitions 14/705 dead transitions. [2024-10-11 14:31:36,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 705 transitions, 13948 flow [2024-10-11 14:31:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-11 14:31:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-10-11 14:31:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 416 transitions. [2024-10-11 14:31:36,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-11 14:31:36,286 INFO L175 Difference]: Start difference. First operand has 318 places, 437 transitions, 8641 flow. Second operand 52 states and 416 transitions. [2024-10-11 14:31:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 705 transitions, 13948 flow [2024-10-11 14:31:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 705 transitions, 13688 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-10-11 14:31:36,455 INFO L231 Difference]: Finished difference. Result has 379 places, 590 transitions, 12945 flow [2024-10-11 14:31:36,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8405, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12945, PETRI_PLACES=379, PETRI_TRANSITIONS=590} [2024-10-11 14:31:36,456 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 355 predicate places. [2024-10-11 14:31:36,456 INFO L471 AbstractCegarLoop]: Abstraction has has 379 places, 590 transitions, 12945 flow [2024-10-11 14:31:36,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:36,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:36,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:36,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:36,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:31:36,657 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:36,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 145136111, now seen corresponding path program 11 times [2024-10-11 14:31:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382384102] [2024-10-11 14:31:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382384102] [2024-10-11 14:31:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382384102] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278358603] [2024-10-11 14:31:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:31:36,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:36,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:31:36,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:36,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:36,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:37,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278358603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:37,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:37,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768738610] [2024-10-11 14:31:37,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:37,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:37,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:37,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 590 transitions, 12945 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:37,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:37,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:37,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:38,044 INFO L124 PetriNetUnfolderBase]: 1349/2533 cut-off events. [2024-10-11 14:31:38,044 INFO L125 PetriNetUnfolderBase]: For 67570/67570 co-relation queries the response was YES. [2024-10-11 14:31:38,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 2533 events. 1349/2533 cut-off events. For 67570/67570 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15540 event pairs, 87 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 25053. Up to 1632 conditions per place. [2024-10-11 14:31:38,067 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 271 selfloop transitions, 354 changer transitions 4/630 dead transitions. [2024-10-11 14:31:38,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 630 transitions, 14457 flow [2024-10-11 14:31:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:31:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:31:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 188 transitions. [2024-10-11 14:31:38,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3164983164983165 [2024-10-11 14:31:38,070 INFO L175 Difference]: Start difference. First operand has 379 places, 590 transitions, 12945 flow. Second operand 27 states and 188 transitions. [2024-10-11 14:31:38,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 630 transitions, 14457 flow [2024-10-11 14:31:38,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 630 transitions, 13773 flow, removed 280 selfloop flow, removed 17 redundant places. [2024-10-11 14:31:38,426 INFO L231 Difference]: Finished difference. Result has 387 places, 593 transitions, 13078 flow [2024-10-11 14:31:38,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12273, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13078, PETRI_PLACES=387, PETRI_TRANSITIONS=593} [2024-10-11 14:31:38,427 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 363 predicate places. [2024-10-11 14:31:38,427 INFO L471 AbstractCegarLoop]: Abstraction has has 387 places, 593 transitions, 13078 flow [2024-10-11 14:31:38,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:38,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:38,427 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:38,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:38,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:31:38,628 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:38,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1557746799, now seen corresponding path program 12 times [2024-10-11 14:31:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:38,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78968103] [2024-10-11 14:31:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:38,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:38,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78968103] [2024-10-11 14:31:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78968103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605456840] [2024-10-11 14:31:38,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:31:38,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:38,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:31:38,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:31:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:38,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:38,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:38,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605456840] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:39,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79155166] [2024-10-11 14:31:39,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:39,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:39,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:39,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 593 transitions, 13078 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:39,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:39,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:39,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:40,865 INFO L124 PetriNetUnfolderBase]: 1459/2742 cut-off events. [2024-10-11 14:31:40,865 INFO L125 PetriNetUnfolderBase]: For 66596/66596 co-relation queries the response was YES. [2024-10-11 14:31:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26193 conditions, 2742 events. 1459/2742 cut-off events. For 66596/66596 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17185 event pairs, 81 based on Foata normal form. 3/2745 useless extension candidates. Maximal degree in co-relation 26090. Up to 1117 conditions per place. [2024-10-11 14:31:40,888 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 232 selfloop transitions, 509 changer transitions 13/755 dead transitions. [2024-10-11 14:31:40,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 755 transitions, 16337 flow [2024-10-11 14:31:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-11 14:31:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-10-11 14:31:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 445 transitions. [2024-10-11 14:31:40,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3315946348733234 [2024-10-11 14:31:40,889 INFO L175 Difference]: Start difference. First operand has 387 places, 593 transitions, 13078 flow. Second operand 61 states and 445 transitions. [2024-10-11 14:31:40,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 755 transitions, 16337 flow [2024-10-11 14:31:41,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 755 transitions, 16163 flow, removed 6 selfloop flow, removed 23 redundant places. [2024-10-11 14:31:41,193 INFO L231 Difference]: Finished difference. Result has 432 places, 659 transitions, 15527 flow [2024-10-11 14:31:41,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12904, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=15527, PETRI_PLACES=432, PETRI_TRANSITIONS=659} [2024-10-11 14:31:41,194 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 408 predicate places. [2024-10-11 14:31:41,194 INFO L471 AbstractCegarLoop]: Abstraction has has 432 places, 659 transitions, 15527 flow [2024-10-11 14:31:41,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:41,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:41,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:41,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:41,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:31:41,395 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:41,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1018876791, now seen corresponding path program 13 times [2024-10-11 14:31:41,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106373371] [2024-10-11 14:31:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106373371] [2024-10-11 14:31:41,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106373371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463733207] [2024-10-11 14:31:41,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:31:41,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:41,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:41,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:31:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:41,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:31:41,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:41,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463733207] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:41,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:41,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:41,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083739303] [2024-10-11 14:31:41,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:41,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:41,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:41,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:41,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 659 transitions, 15527 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:41,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:43,076 INFO L124 PetriNetUnfolderBase]: 1461/2739 cut-off events. [2024-10-11 14:31:43,076 INFO L125 PetriNetUnfolderBase]: For 77893/77893 co-relation queries the response was YES. [2024-10-11 14:31:43,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28169 conditions, 2739 events. 1461/2739 cut-off events. For 77893/77893 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17124 event pairs, 84 based on Foata normal form. 3/2742 useless extension candidates. Maximal degree in co-relation 28062. Up to 1417 conditions per place. [2024-10-11 14:31:43,098 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 278 selfloop transitions, 451 changer transitions 14/744 dead transitions. [2024-10-11 14:31:43,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 744 transitions, 17681 flow [2024-10-11 14:31:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-11 14:31:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-10-11 14:31:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 331 transitions. [2024-10-11 14:31:43,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33434343434343433 [2024-10-11 14:31:43,099 INFO L175 Difference]: Start difference. First operand has 432 places, 659 transitions, 15527 flow. Second operand 45 states and 331 transitions. [2024-10-11 14:31:43,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 744 transitions, 17681 flow [2024-10-11 14:31:43,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 744 transitions, 17347 flow, removed 113 selfloop flow, removed 17 redundant places. [2024-10-11 14:31:43,437 INFO L231 Difference]: Finished difference. Result has 461 places, 671 transitions, 16939 flow [2024-10-11 14:31:43,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15195, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16939, PETRI_PLACES=461, PETRI_TRANSITIONS=671} [2024-10-11 14:31:43,437 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 437 predicate places. [2024-10-11 14:31:43,437 INFO L471 AbstractCegarLoop]: Abstraction has has 461 places, 671 transitions, 16939 flow [2024-10-11 14:31:43,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-10-11 14:31:43,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:43,438 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:43,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:31:43,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:43,638 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:43,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1643399008, now seen corresponding path program 1 times [2024-10-11 14:31:43,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:43,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222071849] [2024-10-11 14:31:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:43,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222071849] [2024-10-11 14:31:43,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222071849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943824218] [2024-10-11 14:31:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:43,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:43,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:31:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:43,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:31:43,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:43,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:44,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943824218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:44,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:44,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-10-11 14:31:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961392725] [2024-10-11 14:31:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:44,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:31:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:31:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:31:44,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:44,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 671 transitions, 16939 flow. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 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) [2024-10-11 14:31:44,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:44,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:44,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:45,418 INFO L124 PetriNetUnfolderBase]: 1467/2744 cut-off events. [2024-10-11 14:31:45,418 INFO L125 PetriNetUnfolderBase]: For 93218/93218 co-relation queries the response was YES. [2024-10-11 14:31:45,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30060 conditions, 2744 events. 1467/2744 cut-off events. For 93218/93218 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17096 event pairs, 91 based on Foata normal form. 2/2746 useless extension candidates. Maximal degree in co-relation 29947. Up to 920 conditions per place. [2024-10-11 14:31:45,441 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 298 selfloop transitions, 448 changer transitions 24/771 dead transitions. [2024-10-11 14:31:45,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 771 transitions, 19375 flow [2024-10-11 14:31:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 14:31:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-11 14:31:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 320 transitions. [2024-10-11 14:31:45,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3827751196172249 [2024-10-11 14:31:45,442 INFO L175 Difference]: Start difference. First operand has 461 places, 671 transitions, 16939 flow. Second operand 38 states and 320 transitions. [2024-10-11 14:31:45,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 771 transitions, 19375 flow [2024-10-11 14:31:45,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 771 transitions, 18949 flow, removed 57 selfloop flow, removed 28 redundant places. [2024-10-11 14:31:45,815 INFO L231 Difference]: Finished difference. Result has 472 places, 670 transitions, 17475 flow [2024-10-11 14:31:45,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16522, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=17475, PETRI_PLACES=472, PETRI_TRANSITIONS=670} [2024-10-11 14:31:45,816 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 448 predicate places. [2024-10-11 14:31:45,816 INFO L471 AbstractCegarLoop]: Abstraction has has 472 places, 670 transitions, 17475 flow [2024-10-11 14:31:45,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 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) [2024-10-11 14:31:45,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:45,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:45,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 14:31:46,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:46,017 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:46,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash 638272561, now seen corresponding path program 14 times [2024-10-11 14:31:46,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124609431] [2024-10-11 14:31:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:46,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124609431] [2024-10-11 14:31:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124609431] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972121424] [2024-10-11 14:31:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:46,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:46,170 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:31:46,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:46,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:31:46,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:46,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:46,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972121424] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:46,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:46,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:31:46,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100677199] [2024-10-11 14:31:46,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:46,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:31:46,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:31:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:31:46,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:46,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 670 transitions, 17475 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:31:46,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:46,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:46,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:52,432 INFO L124 PetriNetUnfolderBase]: 3132/5806 cut-off events. [2024-10-11 14:31:52,432 INFO L125 PetriNetUnfolderBase]: For 244251/244251 co-relation queries the response was YES. [2024-10-11 14:31:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67491 conditions, 5806 events. 3132/5806 cut-off events. For 244251/244251 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41595 event pairs, 109 based on Foata normal form. 91/5897 useless extension candidates. Maximal degree in co-relation 67197. Up to 1530 conditions per place. [2024-10-11 14:31:52,491 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 532 selfloop transitions, 1174 changer transitions 42/1749 dead transitions. [2024-10-11 14:31:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1749 transitions, 44948 flow [2024-10-11 14:31:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2024-10-11 14:31:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2024-10-11 14:31:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 1307 transitions. [2024-10-11 14:31:52,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3600550964187328 [2024-10-11 14:31:52,493 INFO L175 Difference]: Start difference. First operand has 472 places, 670 transitions, 17475 flow. Second operand 165 states and 1307 transitions. [2024-10-11 14:31:52,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1749 transitions, 44948 flow [2024-10-11 14:31:53,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1749 transitions, 43135 flow, removed 130 selfloop flow, removed 30 redundant places. [2024-10-11 14:31:53,570 INFO L231 Difference]: Finished difference. Result has 659 places, 1374 transitions, 39774 flow [2024-10-11 14:31:53,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16658, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=39774, PETRI_PLACES=659, PETRI_TRANSITIONS=1374} [2024-10-11 14:31:53,571 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 635 predicate places. [2024-10-11 14:31:53,571 INFO L471 AbstractCegarLoop]: Abstraction has has 659 places, 1374 transitions, 39774 flow [2024-10-11 14:31:53,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:31:53,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:53,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:53,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:53,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:53,772 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:53,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 506000521, now seen corresponding path program 15 times [2024-10-11 14:31:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924785057] [2024-10-11 14:31:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924785057] [2024-10-11 14:31:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924785057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869380544] [2024-10-11 14:31:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:53,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:53,915 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:53,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:31:53,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:31:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:53,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:31:53,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:54,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:54,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869380544] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:54,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:54,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:31:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350581105] [2024-10-11 14:31:54,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:54,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:31:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:31:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:31:54,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:31:54,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1374 transitions, 39774 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-10-11 14:31:54,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:54,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:31:54,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:00,873 INFO L124 PetriNetUnfolderBase]: 4423/7986 cut-off events. [2024-10-11 14:32:00,873 INFO L125 PetriNetUnfolderBase]: For 774430/774430 co-relation queries the response was YES. [2024-10-11 14:32:00,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113147 conditions, 7986 events. 4423/7986 cut-off events. For 774430/774430 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 57057 event pairs, 107 based on Foata normal form. 16/8002 useless extension candidates. Maximal degree in co-relation 112971. Up to 2363 conditions per place. [2024-10-11 14:32:01,011 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 620 selfloop transitions, 1577 changer transitions 31/2229 dead transitions. [2024-10-11 14:32:01,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 2229 transitions, 65945 flow [2024-10-11 14:32:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-10-11 14:32:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2024-10-11 14:32:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 1109 transitions. [2024-10-11 14:32:01,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37618724559023065 [2024-10-11 14:32:01,013 INFO L175 Difference]: Start difference. First operand has 659 places, 1374 transitions, 39774 flow. Second operand 134 states and 1109 transitions. [2024-10-11 14:32:01,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 2229 transitions, 65945 flow [2024-10-11 14:32:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 2229 transitions, 63151 flow, removed 1236 selfloop flow, removed 27 redundant places. [2024-10-11 14:32:05,595 INFO L231 Difference]: Finished difference. Result has 779 places, 1870 transitions, 56300 flow [2024-10-11 14:32:05,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=37355, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=56300, PETRI_PLACES=779, PETRI_TRANSITIONS=1870} [2024-10-11 14:32:05,597 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 755 predicate places. [2024-10-11 14:32:05,597 INFO L471 AbstractCegarLoop]: Abstraction has has 779 places, 1870 transitions, 56300 flow [2024-10-11 14:32:05,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-10-11 14:32:05,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:05,597 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:05,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:32:05,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 14:32:05,797 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:05,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash -464406829, now seen corresponding path program 16 times [2024-10-11 14:32:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:05,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116241683] [2024-10-11 14:32:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:05,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:05,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116241683] [2024-10-11 14:32:05,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116241683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:05,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703596710] [2024-10-11 14:32:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:32:05,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:05,928 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:05,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:32:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:32:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:05,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:32:05,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:06,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703596710] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:06,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:06,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:32:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494893074] [2024-10-11 14:32:06,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:06,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:32:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:32:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:32:06,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:32:06,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 1870 transitions, 56300 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:06,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:06,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:32:06,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:12,011 INFO L124 PetriNetUnfolderBase]: 4857/8732 cut-off events. [2024-10-11 14:32:12,011 INFO L125 PetriNetUnfolderBase]: For 908727/908727 co-relation queries the response was YES. [2024-10-11 14:32:12,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129200 conditions, 8732 events. 4857/8732 cut-off events. For 908727/908727 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 63302 event pairs, 222 based on Foata normal form. 3/8735 useless extension candidates. Maximal degree in co-relation 128975. Up to 4820 conditions per place. [2024-10-11 14:32:12,130 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 849 selfloop transitions, 1361 changer transitions 13/2224 dead transitions. [2024-10-11 14:32:12,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 2224 transitions, 70059 flow [2024-10-11 14:32:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-11 14:32:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-10-11 14:32:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 513 transitions. [2024-10-11 14:32:12,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33794466403162055 [2024-10-11 14:32:12,132 INFO L175 Difference]: Start difference. First operand has 779 places, 1870 transitions, 56300 flow. Second operand 69 states and 513 transitions. [2024-10-11 14:32:12,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 2224 transitions, 70059 flow [2024-10-11 14:32:18,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 2224 transitions, 68691 flow, removed 361 selfloop flow, removed 54 redundant places. [2024-10-11 14:32:18,159 INFO L231 Difference]: Finished difference. Result has 795 places, 2072 transitions, 65530 flow [2024-10-11 14:32:18,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=55125, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=65530, PETRI_PLACES=795, PETRI_TRANSITIONS=2072} [2024-10-11 14:32:18,160 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 771 predicate places. [2024-10-11 14:32:18,160 INFO L471 AbstractCegarLoop]: Abstraction has has 795 places, 2072 transitions, 65530 flow [2024-10-11 14:32:18,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:18,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:18,161 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:18,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 14:32:18,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:18,361 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:18,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1857637399, now seen corresponding path program 17 times [2024-10-11 14:32:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:18,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777465612] [2024-10-11 14:32:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:18,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777465612] [2024-10-11 14:32:18,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777465612] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:18,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204618347] [2024-10-11 14:32:18,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:32:18,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:18,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:32:18,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:32:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:18,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:32:18,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204618347] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:18,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:18,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:32:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193599657] [2024-10-11 14:32:18,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:18,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:32:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:32:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:32:18,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:32:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 2072 transitions, 65530 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:18,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:18,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:32:18,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:24,871 INFO L124 PetriNetUnfolderBase]: 4992/8977 cut-off events. [2024-10-11 14:32:24,871 INFO L125 PetriNetUnfolderBase]: For 916160/916160 co-relation queries the response was YES. [2024-10-11 14:32:24,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135827 conditions, 8977 events. 4992/8977 cut-off events. For 916160/916160 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 65469 event pairs, 219 based on Foata normal form. 3/8980 useless extension candidates. Maximal degree in co-relation 135632. Up to 4943 conditions per place. [2024-10-11 14:32:25,001 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 797 selfloop transitions, 1469 changer transitions 14/2281 dead transitions. [2024-10-11 14:32:25,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2281 transitions, 74783 flow [2024-10-11 14:32:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-10-11 14:32:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-10-11 14:32:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 553 transitions. [2024-10-11 14:32:25,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33515151515151514 [2024-10-11 14:32:25,003 INFO L175 Difference]: Start difference. First operand has 795 places, 2072 transitions, 65530 flow. Second operand 75 states and 553 transitions. [2024-10-11 14:32:25,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2281 transitions, 74783 flow [2024-10-11 14:32:30,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2281 transitions, 74670 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-10-11 14:32:30,529 INFO L231 Difference]: Finished difference. Result has 861 places, 2136 transitions, 72387 flow [2024-10-11 14:32:30,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=65421, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=72387, PETRI_PLACES=861, PETRI_TRANSITIONS=2136} [2024-10-11 14:32:30,530 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 837 predicate places. [2024-10-11 14:32:30,531 INFO L471 AbstractCegarLoop]: Abstraction has has 861 places, 2136 transitions, 72387 flow [2024-10-11 14:32:30,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:30,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:30,531 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:30,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:30,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 14:32:30,731 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:30,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1684389707, now seen corresponding path program 18 times [2024-10-11 14:32:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394243905] [2024-10-11 14:32:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394243905] [2024-10-11 14:32:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394243905] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043148806] [2024-10-11 14:32:30,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:32:30,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:30,861 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:30,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:32:30,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:32:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:30,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:32:30,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:31,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043148806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:31,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:31,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:32:31,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004678850] [2024-10-11 14:32:31,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:31,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:32:31,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:31,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:32:31,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:32:31,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:32:31,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 2136 transitions, 72387 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:31,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:31,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:32:31,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:38,264 INFO L124 PetriNetUnfolderBase]: 5012/9032 cut-off events. [2024-10-11 14:32:38,264 INFO L125 PetriNetUnfolderBase]: For 993654/993654 co-relation queries the response was YES. [2024-10-11 14:32:38,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142792 conditions, 9032 events. 5012/9032 cut-off events. For 993654/993654 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 66063 event pairs, 224 based on Foata normal form. 3/9035 useless extension candidates. Maximal degree in co-relation 142590. Up to 4830 conditions per place. [2024-10-11 14:32:38,393 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 826 selfloop transitions, 1469 changer transitions 12/2308 dead transitions. [2024-10-11 14:32:38,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 2308 transitions, 79762 flow [2024-10-11 14:32:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-10-11 14:32:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-10-11 14:32:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 612 transitions. [2024-10-11 14:32:38,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33515881708652795 [2024-10-11 14:32:38,395 INFO L175 Difference]: Start difference. First operand has 861 places, 2136 transitions, 72387 flow. Second operand 83 states and 612 transitions. [2024-10-11 14:32:38,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 2308 transitions, 79762 flow [2024-10-11 14:32:45,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 912 places, 2308 transitions, 79274 flow, removed 100 selfloop flow, removed 28 redundant places. [2024-10-11 14:32:45,145 INFO L231 Difference]: Finished difference. Result has 918 places, 2149 transitions, 76554 flow [2024-10-11 14:32:45,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=71937, PETRI_DIFFERENCE_MINUEND_PLACES=830, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=76554, PETRI_PLACES=918, PETRI_TRANSITIONS=2149} [2024-10-11 14:32:45,146 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 894 predicate places. [2024-10-11 14:32:45,146 INFO L471 AbstractCegarLoop]: Abstraction has has 918 places, 2149 transitions, 76554 flow [2024-10-11 14:32:45,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:45,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:45,147 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:45,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:45,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:45,347 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:45,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1736836909, now seen corresponding path program 19 times [2024-10-11 14:32:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:45,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466952205] [2024-10-11 14:32:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466952205] [2024-10-11 14:32:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466952205] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208111379] [2024-10-11 14:32:45,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:32:45,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:45,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:45,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:45,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 14:32:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:45,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 14:32:45,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:45,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208111379] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:45,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:45,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-11 14:32:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784967927] [2024-10-11 14:32:45,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:45,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 14:32:45,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 14:32:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-10-11 14:32:45,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-11 14:32:45,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 2149 transitions, 76554 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-10-11 14:32:45,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:45,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-11 14:32:45,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand