./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-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:36:14,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:36:14,590 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:36:14,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:36:14,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:36:14,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:36:14,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:36:14,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:36:14,622 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:36:14,623 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:36:14,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:36:14,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:36:14,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:36:14,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:36:14,626 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:36:14,626 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:36:14,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:36:14,627 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:36:14,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:36:14,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:36:14,627 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:36:14,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:36:14,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:36:14,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:36:14,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:36:14,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:36:14,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:36:14,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:14,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:36:14,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:36:14,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:36:14,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:36:14,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:36:14,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:36:14,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:36:14,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:36:14,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:36:14,634 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-10-24 12:36:14,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:36:14,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:36:14,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:36:14,864 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:36:14,864 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:36:14,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-10-24 12:36:16,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:36:16,293 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:36:16,294 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-10-24 12:36:16,305 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19af20a36/704851fdec3d43579df570f372418ef1/FLAGded96bf8d [2024-10-24 12:36:16,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19af20a36/704851fdec3d43579df570f372418ef1 [2024-10-24 12:36:16,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:36:16,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:36:16,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:16,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:36:16,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:36:16,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d01cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16, skipping insertion in model container [2024-10-24 12:36:16,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,728 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:36:16,873 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-10-24 12:36:16,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:16,885 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:36:16,901 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-10-24 12:36:16,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:16,917 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:36:16,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16 WrapperNode [2024-10-24 12:36:16,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:16,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:16,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:36:16,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:36:16,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,941 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-10-24 12:36:16,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:16,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:36:16,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:36:16,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:36:16,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,951 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,960 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]. [2024-10-24 12:36:16,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,963 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,966 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:36:16,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:36:16,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:36:16,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:36:16,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (1/1) ... [2024-10-24 12:36:16,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:16,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:16,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:36:16,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:36:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:36:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:36:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:36:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:36:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:36:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:36:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:36:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:36:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:36:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:36:17,027 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:36:17,092 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:36:17,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:36:17,208 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:36:17,208 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:36:17,323 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:36:17,324 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 12:36:17,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:17 BoogieIcfgContainer [2024-10-24 12:36:17,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:36:17,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:36:17,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:36:17,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:36:17,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:36:16" (1/3) ... [2024-10-24 12:36:17,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63306f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:17, skipping insertion in model container [2024-10-24 12:36:17,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:16" (2/3) ... [2024-10-24 12:36:17,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63306f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:17, skipping insertion in model container [2024-10-24 12:36:17,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:17" (3/3) ... [2024-10-24 12:36:17,332 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-10-24 12:36:17,344 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:36:17,345 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:36:17,345 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:36:17,377 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:36:17,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-24 12:36:17,417 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-24 12:36:17,417 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:36:17,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-24 12:36:17,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-24 12:36:17,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-24 12:36:17,429 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:36:17,434 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;@6eabfee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:36:17,434 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:36:17,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:36:17,443 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-24 12:36:17,443 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:36:17,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:17,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:17,447 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:17,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:17,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1126928125, now seen corresponding path program 1 times [2024-10-24 12:36:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:17,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217098008] [2024-10-24 12:36:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:17,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217098008] [2024-10-24 12:36:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217098008] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:36:17,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074104367] [2024-10-24 12:36:17,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:17,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:36:17,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:36:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:36:17,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-24 12:36:17,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:17,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-24 12:36:17,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:17,765 INFO L124 PetriNetUnfolderBase]: 61/128 cut-off events. [2024-10-24 12:36:17,766 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-24 12:36:17,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 61/128 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 381 event pairs, 31 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 218. Up to 86 conditions per place. [2024-10-24 12:36:17,768 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-10-24 12:36:17,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-10-24 12:36:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-24 12:36:17,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-10-24 12:36:17,778 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-10-24 12:36:17,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-10-24 12:36:17,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:36:17,781 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-10-24 12:36:17,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-10-24 12:36:17,785 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-10-24 12:36:17,785 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-10-24 12:36:17,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:17,785 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:17,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:36:17,786 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:17,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1437000289, now seen corresponding path program 1 times [2024-10-24 12:36:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:17,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011158250] [2024-10-24 12:36:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:17,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:17,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011158250] [2024-10-24 12:36:17,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011158250] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:17,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:17,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:36:17,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065290047] [2024-10-24 12:36:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:17,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:36:17,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:36:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:36:17,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-24 12:36:17,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:17,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-24 12:36:17,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:17,941 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2024-10-24 12:36:17,941 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-10-24 12:36:17,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 179 events. 89/179 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 598 event pairs, 37 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2024-10-24 12:36:17,944 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-10-24 12:36:17,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-10-24 12:36:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-24 12:36:17,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-10-24 12:36:17,945 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-10-24 12:36:17,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-10-24 12:36:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:17,946 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-24 12:36:17,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-24 12:36:17,947 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-24 12:36:17,947 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-24 12:36:17,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:17,950 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:17,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:36:17,951 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:17,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1087690981, now seen corresponding path program 1 times [2024-10-24 12:36:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689402042] [2024-10-24 12:36:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689402042] [2024-10-24 12:36:18,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689402042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291897320] [2024-10-24 12:36:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:18,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:18,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:36:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:18,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:18,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:18,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291897320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:19,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:19,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037628158] [2024-10-24 12:36:19,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:19,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:19,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:19,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 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) [2024-10-24 12:36:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:19,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:19,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:19,957 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-10-24 12:36:19,957 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-10-24 12:36:19,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 665 events. 387/665 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2625 event pairs, 23 based on Foata normal form. 14/679 useless extension candidates. Maximal degree in co-relation 595. Up to 218 conditions per place. [2024-10-24 12:36:19,961 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-10-24 12:36:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-10-24 12:36:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 12:36:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-24 12:36:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-10-24 12:36:19,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-10-24 12:36:19,965 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-10-24 12:36:19,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-10-24 12:36:19,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:19,971 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-10-24 12:36:19,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=504, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-10-24 12:36:19,972 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-10-24 12:36:19,972 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-10-24 12:36:19,973 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) [2024-10-24 12:36:19,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:19,973 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:19,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:20,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:20,178 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:20,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1244966769, now seen corresponding path program 2 times [2024-10-24 12:36:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123895189] [2024-10-24 12:36:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123895189] [2024-10-24 12:36:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123895189] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544788042] [2024-10-24 12:36:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:20,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:20,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:20,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:20,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:36:20,449 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:20,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:20,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:20,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544788042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:20,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:20,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420432351] [2024-10-24 12:36:20,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:20,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:20,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:20,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:20,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:21,676 INFO L124 PetriNetUnfolderBase]: 573/1013 cut-off events. [2024-10-24 12:36:21,676 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-10-24 12:36:21,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 1013 events. 573/1013 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4701 event pairs, 35 based on Foata normal form. 2/1015 useless extension candidates. Maximal degree in co-relation 4191. Up to 290 conditions per place. [2024-10-24 12:36:21,684 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 104 selfloop transitions, 107 changer transitions 28/240 dead transitions. [2024-10-24 12:36:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 240 transitions, 1958 flow [2024-10-24 12:36:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-24 12:36:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-24 12:36:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 227 transitions. [2024-10-24 12:36:21,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-10-24 12:36:21,686 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 24 states and 227 transitions. [2024-10-24 12:36:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 240 transitions, 1958 flow [2024-10-24 12:36:21,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 240 transitions, 1936 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-10-24 12:36:21,705 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1431 flow [2024-10-24 12:36:21,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1431, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2024-10-24 12:36:21,706 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 79 predicate places. [2024-10-24 12:36:21,706 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1431 flow [2024-10-24 12:36:21,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:21,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:21,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:21,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:36:21,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-24 12:36:21,908 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:21,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 253928195, now seen corresponding path program 3 times [2024-10-24 12:36:21,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303360785] [2024-10-24 12:36:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303360785] [2024-10-24 12:36:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303360785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812299093] [2024-10-24 12:36:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:22,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:22,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:36:22,122 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:36:22,122 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:22,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:22,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812299093] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:22,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:22,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452662924] [2024-10-24 12:36:22,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:22,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:22,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:22,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 1431 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:23,703 INFO L124 PetriNetUnfolderBase]: 603/1072 cut-off events. [2024-10-24 12:36:23,703 INFO L125 PetriNetUnfolderBase]: For 5793/5793 co-relation queries the response was YES. [2024-10-24 12:36:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 1072 events. 603/1072 cut-off events. For 5793/5793 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5095 event pairs, 27 based on Foata normal form. 2/1074 useless extension candidates. Maximal degree in co-relation 5770. Up to 304 conditions per place. [2024-10-24 12:36:23,719 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 105 selfloop transitions, 139 changer transitions 21/266 dead transitions. [2024-10-24 12:36:23,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 266 transitions, 2879 flow [2024-10-24 12:36:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 12:36:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-24 12:36:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-10-24 12:36:23,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-10-24 12:36:23,721 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1431 flow. Second operand 28 states and 254 transitions. [2024-10-24 12:36:23,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 266 transitions, 2879 flow [2024-10-24 12:36:23,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 266 transitions, 2772 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:23,748 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2184 flow [2024-10-24 12:36:23,750 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2184, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-10-24 12:36:23,752 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2024-10-24 12:36:23,753 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2184 flow [2024-10-24 12:36:23,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:23,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:23,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:23,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:36:23,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:23,954 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:23,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1106845699, now seen corresponding path program 4 times [2024-10-24 12:36:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:23,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446810604] [2024-10-24 12:36:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446810604] [2024-10-24 12:36:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446810604] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679896312] [2024-10-24 12:36:24,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:24,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:24,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:24,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:24,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:36:24,198 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:24,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:24,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 12:36:24,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:24,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:24,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679896312] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:24,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:24,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-10-24 12:36:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409357992] [2024-10-24 12:36:24,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:24,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:24,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:24,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2184 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2024-10-24 12:36:24,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:24,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:24,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:26,025 INFO L124 PetriNetUnfolderBase]: 982/1749 cut-off events. [2024-10-24 12:36:26,025 INFO L125 PetriNetUnfolderBase]: For 14658/14658 co-relation queries the response was YES. [2024-10-24 12:36:26,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 1749 events. 982/1749 cut-off events. For 14658/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9256 event pairs, 28 based on Foata normal form. 4/1753 useless extension candidates. Maximal degree in co-relation 10972. Up to 511 conditions per place. [2024-10-24 12:36:26,038 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 183 selfloop transitions, 250 changer transitions 19/453 dead transitions. [2024-10-24 12:36:26,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 453 transitions, 6004 flow [2024-10-24 12:36:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-24 12:36:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-10-24 12:36:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 357 transitions. [2024-10-24 12:36:26,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-10-24 12:36:26,040 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2184 flow. Second operand 39 states and 357 transitions. [2024-10-24 12:36:26,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 453 transitions, 6004 flow [2024-10-24 12:36:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 453 transitions, 5524 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-10-24 12:36:26,100 INFO L231 Difference]: Finished difference. Result has 172 places, 324 transitions, 4614 flow [2024-10-24 12:36:26,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4614, PETRI_PLACES=172, PETRI_TRANSITIONS=324} [2024-10-24 12:36:26,102 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-10-24 12:36:26,103 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 324 transitions, 4614 flow [2024-10-24 12:36:26,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2024-10-24 12:36:26,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:26,103 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:26,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:36:26,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:26,308 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:26,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1094682093, now seen corresponding path program 5 times [2024-10-24 12:36:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030171160] [2024-10-24 12:36:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030171160] [2024-10-24 12:36:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030171160] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838646976] [2024-10-24 12:36:26,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:26,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:26,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:26,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:36:26,528 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:26,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:26,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 12:36:26,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:26,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838646976] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:26,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:26,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-10-24 12:36:26,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657022577] [2024-10-24 12:36:26,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:26,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:26,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:26,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:26,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 324 transitions, 4614 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) [2024-10-24 12:36:26,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:26,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:26,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:27,867 INFO L124 PetriNetUnfolderBase]: 1104/1944 cut-off events. [2024-10-24 12:36:27,868 INFO L125 PetriNetUnfolderBase]: For 20936/20936 co-relation queries the response was YES. [2024-10-24 12:36:27,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13794 conditions, 1944 events. 1104/1944 cut-off events. For 20936/20936 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10435 event pairs, 41 based on Foata normal form. 2/1946 useless extension candidates. Maximal degree in co-relation 13641. Up to 751 conditions per place. [2024-10-24 12:36:27,886 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 204 selfloop transitions, 256 changer transitions 24/485 dead transitions. [2024-10-24 12:36:27,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 485 transitions, 7420 flow [2024-10-24 12:36:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-24 12:36:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-24 12:36:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 305 transitions. [2024-10-24 12:36:27,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-10-24 12:36:27,888 INFO L175 Difference]: Start difference. First operand has 172 places, 324 transitions, 4614 flow. Second operand 35 states and 305 transitions. [2024-10-24 12:36:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 485 transitions, 7420 flow [2024-10-24 12:36:27,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 485 transitions, 6431 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-10-24 12:36:28,000 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 5574 flow [2024-10-24 12:36:28,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5574, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-10-24 12:36:28,001 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2024-10-24 12:36:28,001 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 5574 flow [2024-10-24 12:36:28,001 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) [2024-10-24 12:36:28,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:28,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:28,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:36:28,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:28,202 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:28,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 691254019, now seen corresponding path program 6 times [2024-10-24 12:36:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270729463] [2024-10-24 12:36:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:28,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270729463] [2024-10-24 12:36:28,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270729463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090032656] [2024-10-24 12:36:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:28,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:28,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:28,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:36:28,377 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:36:28,377 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:28,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:28,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:28,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090032656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:28,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:28,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328158701] [2024-10-24 12:36:28,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:28,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:28,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:28,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:28,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 5574 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:28,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:28,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:28,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:29,564 INFO L124 PetriNetUnfolderBase]: 1225/2178 cut-off events. [2024-10-24 12:36:29,565 INFO L125 PetriNetUnfolderBase]: For 20738/20738 co-relation queries the response was YES. [2024-10-24 12:36:29,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2178 events. 1225/2178 cut-off events. For 20738/20738 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12176 event pairs, 36 based on Foata normal form. 13/2191 useless extension candidates. Maximal degree in co-relation 15168. Up to 974 conditions per place. [2024-10-24 12:36:29,583 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 220 selfloop transitions, 276 changer transitions 30/527 dead transitions. [2024-10-24 12:36:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 527 transitions, 8436 flow [2024-10-24 12:36:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:36:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:36:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2024-10-24 12:36:29,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2024-10-24 12:36:29,584 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 5574 flow. Second operand 23 states and 205 transitions. [2024-10-24 12:36:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 527 transitions, 8436 flow [2024-10-24 12:36:29,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 527 transitions, 8230 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-10-24 12:36:29,710 INFO L231 Difference]: Finished difference. Result has 221 places, 442 transitions, 7609 flow [2024-10-24 12:36:29,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7609, PETRI_PLACES=221, PETRI_TRANSITIONS=442} [2024-10-24 12:36:29,710 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-10-24 12:36:29,711 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 442 transitions, 7609 flow [2024-10-24 12:36:29,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:29,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:29,711 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:29,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:29,912 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:29,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1544171523, now seen corresponding path program 7 times [2024-10-24 12:36:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866521595] [2024-10-24 12:36:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866521595] [2024-10-24 12:36:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866521595] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557083381] [2024-10-24 12:36:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:36:30,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:30,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:36:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:30,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:30,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557083381] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:30,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:30,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126911468] [2024-10-24 12:36:30,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:30,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:30,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:30,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:30,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 442 transitions, 7609 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) [2024-10-24 12:36:30,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:30,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:30,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:31,355 INFO L124 PetriNetUnfolderBase]: 1291/2280 cut-off events. [2024-10-24 12:36:31,355 INFO L125 PetriNetUnfolderBase]: For 28931/28931 co-relation queries the response was YES. [2024-10-24 12:36:31,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17865 conditions, 2280 events. 1291/2280 cut-off events. For 28931/28931 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12712 event pairs, 27 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 17694. Up to 1028 conditions per place. [2024-10-24 12:36:31,374 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 232 selfloop transitions, 335 changer transitions 21/589 dead transitions. [2024-10-24 12:36:31,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 589 transitions, 10730 flow [2024-10-24 12:36:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 12:36:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-24 12:36:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 223 transitions. [2024-10-24 12:36:31,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3932980599647266 [2024-10-24 12:36:31,376 INFO L175 Difference]: Start difference. First operand has 221 places, 442 transitions, 7609 flow. Second operand 27 states and 223 transitions. [2024-10-24 12:36:31,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 589 transitions, 10730 flow [2024-10-24 12:36:31,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 589 transitions, 10506 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-10-24 12:36:31,626 INFO L231 Difference]: Finished difference. Result has 248 places, 516 transitions, 10031 flow [2024-10-24 12:36:31,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10031, PETRI_PLACES=248, PETRI_TRANSITIONS=516} [2024-10-24 12:36:31,627 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2024-10-24 12:36:31,627 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 516 transitions, 10031 flow [2024-10-24 12:36:31,627 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) [2024-10-24 12:36:31,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:31,628 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:31,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:36:31,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:31,832 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:31,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1247042307, now seen corresponding path program 8 times [2024-10-24 12:36:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432707069] [2024-10-24 12:36:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432707069] [2024-10-24 12:36:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432707069] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586714798] [2024-10-24 12:36:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:31,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:31,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:31,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:36:32,020 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:32,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:32,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:32,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:32,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:32,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586714798] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:32,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289301782] [2024-10-24 12:36:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:32,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:32,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 516 transitions, 10031 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:33,181 INFO L124 PetriNetUnfolderBase]: 1280/2246 cut-off events. [2024-10-24 12:36:33,182 INFO L125 PetriNetUnfolderBase]: For 33603/33603 co-relation queries the response was YES. [2024-10-24 12:36:33,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19632 conditions, 2246 events. 1280/2246 cut-off events. For 33603/33603 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12253 event pairs, 31 based on Foata normal form. 7/2253 useless extension candidates. Maximal degree in co-relation 19482. Up to 1012 conditions per place. [2024-10-24 12:36:33,237 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 259 selfloop transitions, 313 changer transitions 26/599 dead transitions. [2024-10-24 12:36:33,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 599 transitions, 12291 flow [2024-10-24 12:36:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 12:36:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 12:36:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 191 transitions. [2024-10-24 12:36:33,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4331065759637188 [2024-10-24 12:36:33,240 INFO L175 Difference]: Start difference. First operand has 248 places, 516 transitions, 10031 flow. Second operand 21 states and 191 transitions. [2024-10-24 12:36:33,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 599 transitions, 12291 flow [2024-10-24 12:36:33,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 599 transitions, 12043 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-10-24 12:36:33,445 INFO L231 Difference]: Finished difference. Result has 265 places, 529 transitions, 11431 flow [2024-10-24 12:36:33,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9786, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11431, PETRI_PLACES=265, PETRI_TRANSITIONS=529} [2024-10-24 12:36:33,445 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2024-10-24 12:36:33,446 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 529 transitions, 11431 flow [2024-10-24 12:36:33,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-10-24 12:36:33,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:33,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:33,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:33,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 12:36:33,647 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:33,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2099959811, now seen corresponding path program 9 times [2024-10-24 12:36:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118622737] [2024-10-24 12:36:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:33,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:33,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118622737] [2024-10-24 12:36:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118622737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:33,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535959422] [2024-10-24 12:36:33,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:33,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:33,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:33,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:33,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:36:33,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:36:33,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:33,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:33,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:33,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535959422] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:34,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 12:36:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580570888] [2024-10-24 12:36:34,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:34,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:36:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:36:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-10-24 12:36:34,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:34,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 529 transitions, 11431 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) [2024-10-24 12:36:34,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:34,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:34,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:35,309 INFO L124 PetriNetUnfolderBase]: 1306/2297 cut-off events. [2024-10-24 12:36:35,309 INFO L125 PetriNetUnfolderBase]: For 40668/40668 co-relation queries the response was YES. [2024-10-24 12:36:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 2297 events. 1306/2297 cut-off events. For 40668/40668 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12621 event pairs, 28 based on Foata normal form. 2/2299 useless extension candidates. Maximal degree in co-relation 21463. Up to 1024 conditions per place. [2024-10-24 12:36:35,329 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 261 selfloop transitions, 378 changer transitions 18/658 dead transitions. [2024-10-24 12:36:35,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 658 transitions, 14505 flow [2024-10-24 12:36:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 12:36:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-24 12:36:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2024-10-24 12:36:35,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39105339105339104 [2024-10-24 12:36:35,331 INFO L175 Difference]: Start difference. First operand has 265 places, 529 transitions, 11431 flow. Second operand 33 states and 271 transitions. [2024-10-24 12:36:35,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 658 transitions, 14505 flow [2024-10-24 12:36:35,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 658 transitions, 14324 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-10-24 12:36:35,593 INFO L231 Difference]: Finished difference. Result has 292 places, 585 transitions, 13921 flow [2024-10-24 12:36:35,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11294, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13921, PETRI_PLACES=292, PETRI_TRANSITIONS=585} [2024-10-24 12:36:35,594 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2024-10-24 12:36:35,594 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 585 transitions, 13921 flow [2024-10-24 12:36:35,594 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) [2024-10-24 12:36:35,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:35,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:35,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 12:36:35,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:35,795 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:35,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -492124575, now seen corresponding path program 10 times [2024-10-24 12:36:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549910670] [2024-10-24 12:36:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549910670] [2024-10-24 12:36:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549910670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842534398] [2024-10-24 12:36:35,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:35,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:35,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:35,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:35,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:36:35,974 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:35,975 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:35,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:36:35,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:36,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:36,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842534398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:36,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:36,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-10-24 12:36:36,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746610054] [2024-10-24 12:36:36,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:36,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 12:36:36,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 12:36:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-10-24 12:36:36,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:36,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 585 transitions, 13921 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-10-24 12:36:36,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:36,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:36,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:37,227 INFO L124 PetriNetUnfolderBase]: 1322/2324 cut-off events. [2024-10-24 12:36:37,227 INFO L125 PetriNetUnfolderBase]: For 49267/49267 co-relation queries the response was YES. [2024-10-24 12:36:37,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23858 conditions, 2324 events. 1322/2324 cut-off events. For 49267/49267 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12756 event pairs, 18 based on Foata normal form. 1/2325 useless extension candidates. Maximal degree in co-relation 23664. Up to 1071 conditions per place. [2024-10-24 12:36:37,248 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 210 selfloop transitions, 443 changer transitions 5/659 dead transitions. [2024-10-24 12:36:37,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 659 transitions, 16265 flow [2024-10-24 12:36:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:36:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:36:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 185 transitions. [2024-10-24 12:36:37,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3830227743271222 [2024-10-24 12:36:37,250 INFO L175 Difference]: Start difference. First operand has 292 places, 585 transitions, 13921 flow. Second operand 23 states and 185 transitions. [2024-10-24 12:36:37,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 659 transitions, 16265 flow [2024-10-24 12:36:37,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 659 transitions, 15873 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-10-24 12:36:37,598 INFO L231 Difference]: Finished difference. Result has 298 places, 604 transitions, 15119 flow [2024-10-24 12:36:37,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15119, PETRI_PLACES=298, PETRI_TRANSITIONS=604} [2024-10-24 12:36:37,599 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 275 predicate places. [2024-10-24 12:36:37,599 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 604 transitions, 15119 flow [2024-10-24 12:36:37,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-10-24 12:36:37,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:37,599 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:37,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 12:36:37,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 12:36:37,800 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:37,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -185650157, now seen corresponding path program 11 times [2024-10-24 12:36:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:37,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700062947] [2024-10-24 12:36:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:37,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:37,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700062947] [2024-10-24 12:36:37,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700062947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108802941] [2024-10-24 12:36:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:37,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:37,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:37,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:37,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:36:37,995 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 12:36:37,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:37,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:36:37,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:38,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:38,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108802941] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:38,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:38,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:36:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985847457] [2024-10-24 12:36:38,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:38,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:36:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:36:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:36:38,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:38,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 604 transitions, 15119 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:36:38,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:38,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:41,017 INFO L124 PetriNetUnfolderBase]: 1822/3287 cut-off events. [2024-10-24 12:36:41,017 INFO L125 PetriNetUnfolderBase]: For 79679/79679 co-relation queries the response was YES. [2024-10-24 12:36:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 3287 events. 1822/3287 cut-off events. For 79679/79679 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19556 event pairs, 63 based on Foata normal form. 5/3292 useless extension candidates. Maximal degree in co-relation 35247. Up to 1050 conditions per place. [2024-10-24 12:36:41,053 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 403 selfloop transitions, 557 changer transitions 29/990 dead transitions. [2024-10-24 12:36:41,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 990 transitions, 24616 flow [2024-10-24 12:36:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-24 12:36:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-10-24 12:36:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 549 transitions. [2024-10-24 12:36:41,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-10-24 12:36:41,055 INFO L175 Difference]: Start difference. First operand has 298 places, 604 transitions, 15119 flow. Second operand 63 states and 549 transitions. [2024-10-24 12:36:41,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 990 transitions, 24616 flow [2024-10-24 12:36:41,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 990 transitions, 24396 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-10-24 12:36:41,596 INFO L231 Difference]: Finished difference. Result has 363 places, 780 transitions, 21984 flow [2024-10-24 12:36:41,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14919, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21984, PETRI_PLACES=363, PETRI_TRANSITIONS=780} [2024-10-24 12:36:41,597 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2024-10-24 12:36:41,597 INFO L471 AbstractCegarLoop]: Abstraction has has 363 places, 780 transitions, 21984 flow [2024-10-24 12:36:41,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:36:41,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:41,597 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:41,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 12:36:41,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 12:36:41,801 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:41,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash 331302923, now seen corresponding path program 12 times [2024-10-24 12:36:41,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:41,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901432068] [2024-10-24 12:36:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:42,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901432068] [2024-10-24 12:36:42,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901432068] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:42,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241900494] [2024-10-24 12:36:42,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:42,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:42,034 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:42,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 12:36:42,070 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-24 12:36:42,070 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:42,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:36:42,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:42,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241900494] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:42,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:36:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147197067] [2024-10-24 12:36:42,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:42,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:36:42,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:36:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:36:42,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:42,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 780 transitions, 21984 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:36:42,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:42,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:42,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:45,880 INFO L124 PetriNetUnfolderBase]: 2049/3687 cut-off events. [2024-10-24 12:36:45,880 INFO L125 PetriNetUnfolderBase]: For 113661/113661 co-relation queries the response was YES. [2024-10-24 12:36:45,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43869 conditions, 3687 events. 2049/3687 cut-off events. For 113661/113661 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22530 event pairs, 41 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 43755. Up to 1157 conditions per place. [2024-10-24 12:36:45,989 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 375 selfloop transitions, 708 changer transitions 29/1113 dead transitions. [2024-10-24 12:36:45,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1113 transitions, 30503 flow [2024-10-24 12:36:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-10-24 12:36:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-10-24 12:36:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 660 transitions. [2024-10-24 12:36:45,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39783001808318263 [2024-10-24 12:36:45,993 INFO L175 Difference]: Start difference. First operand has 363 places, 780 transitions, 21984 flow. Second operand 79 states and 660 transitions. [2024-10-24 12:36:45,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1113 transitions, 30503 flow [2024-10-24 12:36:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1113 transitions, 29923 flow, removed 184 selfloop flow, removed 13 redundant places. [2024-10-24 12:36:47,095 INFO L231 Difference]: Finished difference. Result has 445 places, 910 transitions, 27628 flow [2024-10-24 12:36:47,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21560, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27628, PETRI_PLACES=445, PETRI_TRANSITIONS=910} [2024-10-24 12:36:47,096 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-10-24 12:36:47,096 INFO L471 AbstractCegarLoop]: Abstraction has has 445 places, 910 transitions, 27628 flow [2024-10-24 12:36:47,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:36:47,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:47,096 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:47,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:47,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 12:36:47,297 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:47,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash 171951597, now seen corresponding path program 13 times [2024-10-24 12:36:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316114074] [2024-10-24 12:36:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:47,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:47,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316114074] [2024-10-24 12:36:47,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316114074] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:47,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264226182] [2024-10-24 12:36:47,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:36:47,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:47,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:47,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 12:36:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:47,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:36:47,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:47,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264226182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:48,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:48,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:36:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209653087] [2024-10-24 12:36:48,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:48,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:36:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:36:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:36:48,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:48,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 910 transitions, 27628 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:36:48,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:48,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:48,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:52,475 INFO L124 PetriNetUnfolderBase]: 2324/4200 cut-off events. [2024-10-24 12:36:52,475 INFO L125 PetriNetUnfolderBase]: For 153926/153926 co-relation queries the response was YES. [2024-10-24 12:36:52,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53253 conditions, 4200 events. 2324/4200 cut-off events. For 153926/153926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26552 event pairs, 44 based on Foata normal form. 6/4206 useless extension candidates. Maximal degree in co-relation 52800. Up to 1310 conditions per place. [2024-10-24 12:36:52,523 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 418 selfloop transitions, 853 changer transitions 29/1301 dead transitions. [2024-10-24 12:36:52,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1301 transitions, 38012 flow [2024-10-24 12:36:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-10-24 12:36:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-10-24 12:36:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 897 transitions. [2024-10-24 12:36:52,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3780025284450063 [2024-10-24 12:36:52,525 INFO L175 Difference]: Start difference. First operand has 445 places, 910 transitions, 27628 flow. Second operand 113 states and 897 transitions. [2024-10-24 12:36:52,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1301 transitions, 38012 flow [2024-10-24 12:36:54,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1301 transitions, 37187 flow, removed 147 selfloop flow, removed 29 redundant places. [2024-10-24 12:36:54,077 INFO L231 Difference]: Finished difference. Result has 539 places, 1059 transitions, 34027 flow [2024-10-24 12:36:54,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26933, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=34027, PETRI_PLACES=539, PETRI_TRANSITIONS=1059} [2024-10-24 12:36:54,078 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2024-10-24 12:36:54,078 INFO L471 AbstractCegarLoop]: Abstraction has has 539 places, 1059 transitions, 34027 flow [2024-10-24 12:36:54,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:36:54,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:54,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:54,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:54,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 12:36:54,279 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:54,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1921420705, now seen corresponding path program 14 times [2024-10-24 12:36:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373725276] [2024-10-24 12:36:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:54,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:54,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373725276] [2024-10-24 12:36:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373725276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:54,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119979024] [2024-10-24 12:36:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:54,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:54,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:54,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 12:36:54,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:54,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:54,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:36:54,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:54,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119979024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:55,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:55,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:36:55,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741012882] [2024-10-24 12:36:55,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:55,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:36:55,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:36:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:36:55,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:36:55,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1059 transitions, 34027 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:36:55,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:55,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:36:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:58,974 INFO L124 PetriNetUnfolderBase]: 2801/5033 cut-off events. [2024-10-24 12:36:58,974 INFO L125 PetriNetUnfolderBase]: For 214856/214856 co-relation queries the response was YES. [2024-10-24 12:36:59,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68773 conditions, 5033 events. 2801/5033 cut-off events. For 214856/214856 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33037 event pairs, 71 based on Foata normal form. 5/5038 useless extension candidates. Maximal degree in co-relation 68241. Up to 1587 conditions per place. [2024-10-24 12:36:59,037 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 484 selfloop transitions, 1027 changer transitions 19/1531 dead transitions. [2024-10-24 12:36:59,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1531 transitions, 49581 flow [2024-10-24 12:36:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-10-24 12:36:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-10-24 12:36:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 715 transitions. [2024-10-24 12:36:59,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3959025470653378 [2024-10-24 12:36:59,038 INFO L175 Difference]: Start difference. First operand has 539 places, 1059 transitions, 34027 flow. Second operand 86 states and 715 transitions. [2024-10-24 12:36:59,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1531 transitions, 49581 flow [2024-10-24 12:37:01,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1531 transitions, 47276 flow, removed 714 selfloop flow, removed 57 redundant places. [2024-10-24 12:37:01,491 INFO L231 Difference]: Finished difference. Result has 592 places, 1325 transitions, 45080 flow [2024-10-24 12:37:01,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32513, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=45080, PETRI_PLACES=592, PETRI_TRANSITIONS=1325} [2024-10-24 12:37:01,492 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2024-10-24 12:37:01,492 INFO L471 AbstractCegarLoop]: Abstraction has has 592 places, 1325 transitions, 45080 flow [2024-10-24 12:37:01,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:37:01,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:01,492 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:01,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 12:37:01,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:01,693 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:37:01,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash -105111933, now seen corresponding path program 15 times [2024-10-24 12:37:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717331456] [2024-10-24 12:37:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:01,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:01,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717331456] [2024-10-24 12:37:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717331456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:37:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544827724] [2024-10-24 12:37:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:37:01,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:01,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:37:01,859 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:37:01,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 12:37:01,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:37:01,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:37:01,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:37:01,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:37:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:02,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:37:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544827724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:37:02,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:37:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:37:02,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785964313] [2024-10-24 12:37:02,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:37:02,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:37:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:37:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:37:02,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:37:02,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1325 transitions, 45080 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:37:02,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:02,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:37:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:37:06,916 INFO L124 PetriNetUnfolderBase]: 3191/5728 cut-off events. [2024-10-24 12:37:06,916 INFO L125 PetriNetUnfolderBase]: For 286657/286657 co-relation queries the response was YES. [2024-10-24 12:37:06,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81377 conditions, 5728 events. 3191/5728 cut-off events. For 286657/286657 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38682 event pairs, 87 based on Foata normal form. 4/5732 useless extension candidates. Maximal degree in co-relation 80878. Up to 2498 conditions per place. [2024-10-24 12:37:06,991 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 630 selfloop transitions, 1009 changer transitions 25/1665 dead transitions. [2024-10-24 12:37:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1665 transitions, 56987 flow [2024-10-24 12:37:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-10-24 12:37:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-10-24 12:37:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 565 transitions. [2024-10-24 12:37:06,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-10-24 12:37:06,992 INFO L175 Difference]: Start difference. First operand has 592 places, 1325 transitions, 45080 flow. Second operand 70 states and 565 transitions. [2024-10-24 12:37:06,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1665 transitions, 56987 flow [2024-10-24 12:37:10,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1665 transitions, 56007 flow, removed 245 selfloop flow, removed 20 redundant places. [2024-10-24 12:37:10,931 INFO L231 Difference]: Finished difference. Result has 672 places, 1507 transitions, 54821 flow [2024-10-24 12:37:10,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44206, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=54821, PETRI_PLACES=672, PETRI_TRANSITIONS=1507} [2024-10-24 12:37:10,932 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2024-10-24 12:37:10,933 INFO L471 AbstractCegarLoop]: Abstraction has has 672 places, 1507 transitions, 54821 flow [2024-10-24 12:37:10,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:37:10,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:10,933 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:10,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 12:37:11,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 12:37:11,134 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:37:11,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 209949993, now seen corresponding path program 16 times [2024-10-24 12:37:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025615708] [2024-10-24 12:37:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:11,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:11,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025615708] [2024-10-24 12:37:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025615708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:37:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136143417] [2024-10-24 12:37:11,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:37:11,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:11,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:37:11,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:37:11,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 12:37:11,351 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:37:11,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:37:11,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:37:11,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:37:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:11,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:37:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136143417] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:37:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:37:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:37:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051031936] [2024-10-24 12:37:11,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:37:11,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:37:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:37:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:37:11,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:37:11,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1507 transitions, 54821 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:37:11,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:11,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:37:11,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:37:16,965 INFO L124 PetriNetUnfolderBase]: 3477/6276 cut-off events. [2024-10-24 12:37:16,966 INFO L125 PetriNetUnfolderBase]: For 384671/384671 co-relation queries the response was YES. [2024-10-24 12:37:17,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94639 conditions, 6276 events. 3477/6276 cut-off events. For 384671/384671 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43487 event pairs, 89 based on Foata normal form. 6/6282 useless extension candidates. Maximal degree in co-relation 94123. Up to 2396 conditions per place. [2024-10-24 12:37:17,067 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 615 selfloop transitions, 1217 changer transitions 20/1853 dead transitions. [2024-10-24 12:37:17,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1853 transitions, 67069 flow [2024-10-24 12:37:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-10-24 12:37:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-10-24 12:37:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 667 transitions. [2024-10-24 12:37:17,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3873403019744483 [2024-10-24 12:37:17,069 INFO L175 Difference]: Start difference. First operand has 672 places, 1507 transitions, 54821 flow. Second operand 82 states and 667 transitions. [2024-10-24 12:37:17,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1853 transitions, 67069 flow [2024-10-24 12:37:21,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1853 transitions, 66739 flow, removed 84 selfloop flow, removed 20 redundant places. [2024-10-24 12:37:21,969 INFO L231 Difference]: Finished difference. Result has 754 places, 1659 transitions, 64996 flow [2024-10-24 12:37:21,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54577, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=64996, PETRI_PLACES=754, PETRI_TRANSITIONS=1659} [2024-10-24 12:37:21,971 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 731 predicate places. [2024-10-24 12:37:21,971 INFO L471 AbstractCegarLoop]: Abstraction has has 754 places, 1659 transitions, 64996 flow [2024-10-24 12:37:21,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:37:21,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:21,971 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:21,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-24 12:37:22,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-24 12:37:22,171 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:37:22,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash 76784223, now seen corresponding path program 17 times [2024-10-24 12:37:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801575162] [2024-10-24 12:37:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801575162] [2024-10-24 12:37:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801575162] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:37:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110186648] [2024-10-24 12:37:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:37:22,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:37:22,335 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:37:22,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 12:37:22,374 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 12:37:22,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:37:22,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:37:22,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:37:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:22,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:37:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:23,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110186648] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:37:23,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:37:23,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:37:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189273328] [2024-10-24 12:37:23,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:37:23,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:37:23,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:37:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:37:23,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:37:23,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1659 transitions, 64996 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:37:23,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:23,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:37:23,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:37:29,250 INFO L124 PetriNetUnfolderBase]: 3494/6298 cut-off events. [2024-10-24 12:37:29,250 INFO L125 PetriNetUnfolderBase]: For 424164/424164 co-relation queries the response was YES. [2024-10-24 12:37:29,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100911 conditions, 6298 events. 3494/6298 cut-off events. For 424164/424164 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43556 event pairs, 92 based on Foata normal form. 5/6303 useless extension candidates. Maximal degree in co-relation 100361. Up to 2423 conditions per place. [2024-10-24 12:37:29,350 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 638 selfloop transitions, 1200 changer transitions 27/1866 dead transitions. [2024-10-24 12:37:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 1866 transitions, 71754 flow [2024-10-24 12:37:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-10-24 12:37:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-10-24 12:37:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 748 transitions. [2024-10-24 12:37:29,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36720667648502703 [2024-10-24 12:37:29,351 INFO L175 Difference]: Start difference. First operand has 754 places, 1659 transitions, 64996 flow. Second operand 97 states and 748 transitions. [2024-10-24 12:37:29,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 1866 transitions, 71754 flow [2024-10-24 12:37:35,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 1866 transitions, 70277 flow, removed 536 selfloop flow, removed 38 redundant places. [2024-10-24 12:37:35,676 INFO L231 Difference]: Finished difference. Result has 816 places, 1683 transitions, 67842 flow [2024-10-24 12:37:35,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=63625, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=67842, PETRI_PLACES=816, PETRI_TRANSITIONS=1683} [2024-10-24 12:37:35,678 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 793 predicate places. [2024-10-24 12:37:35,678 INFO L471 AbstractCegarLoop]: Abstraction has has 816 places, 1683 transitions, 67842 flow [2024-10-24 12:37:35,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:37:35,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:35,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:35,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-24 12:37:35,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:35,879 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:37:35,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1879233675, now seen corresponding path program 18 times [2024-10-24 12:37:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024040151] [2024-10-24 12:37:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024040151] [2024-10-24 12:37:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024040151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:37:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314218891] [2024-10-24 12:37:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:37:36,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:37:36,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:37:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 12:37:36,078 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-24 12:37:36,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:37:36,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:37:36,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:37:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:36,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:37:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314218891] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:37:36,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:37:36,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:37:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770650681] [2024-10-24 12:37:36,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:37:36,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:37:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:37:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:37:36,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:37:36,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 1683 transitions, 67842 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:37:36,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:36,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:37:36,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:37:42,233 INFO L124 PetriNetUnfolderBase]: 3795/6850 cut-off events. [2024-10-24 12:37:42,234 INFO L125 PetriNetUnfolderBase]: For 430179/430179 co-relation queries the response was YES. [2024-10-24 12:37:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110053 conditions, 6850 events. 3795/6850 cut-off events. For 430179/430179 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48448 event pairs, 125 based on Foata normal form. 7/6857 useless extension candidates. Maximal degree in co-relation 109631. Up to 3431 conditions per place. [2024-10-24 12:37:42,387 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 728 selfloop transitions, 1243 changer transitions 19/1991 dead transitions. [2024-10-24 12:37:42,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 1991 transitions, 79236 flow [2024-10-24 12:37:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-24 12:37:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-24 12:37:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 503 transitions. [2024-10-24 12:37:42,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3742559523809524 [2024-10-24 12:37:42,389 INFO L175 Difference]: Start difference. First operand has 816 places, 1683 transitions, 67842 flow. Second operand 64 states and 503 transitions. [2024-10-24 12:37:42,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 1991 transitions, 79236 flow [2024-10-24 12:37:50,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1991 transitions, 78202 flow, removed 116 selfloop flow, removed 72 redundant places. [2024-10-24 12:37:50,978 INFO L231 Difference]: Finished difference. Result has 825 places, 1843 transitions, 77109 flow [2024-10-24 12:37:50,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=66900, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=77109, PETRI_PLACES=825, PETRI_TRANSITIONS=1843} [2024-10-24 12:37:50,980 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 802 predicate places. [2024-10-24 12:37:50,980 INFO L471 AbstractCegarLoop]: Abstraction has has 825 places, 1843 transitions, 77109 flow [2024-10-24 12:37:50,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-10-24 12:37:50,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:50,980 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:50,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-24 12:37:51,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:51,181 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:37:51,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -830555685, now seen corresponding path program 19 times [2024-10-24 12:37:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240414632] [2024-10-24 12:37:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:51,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:51,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240414632] [2024-10-24 12:37:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240414632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:37:51,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887135157] [2024-10-24 12:37:51,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:37:51,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:37:51,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:37:51,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 12:37:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:51,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:37:51,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:37:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:51,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:37:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:37:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887135157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:37:51,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:37:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-10-24 12:37:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811767726] [2024-10-24 12:37:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:37:51,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:37:51,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:37:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:37:52,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:37:52,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 1843 transitions, 77109 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-10-24 12:37:52,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:52,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:37:52,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand