./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-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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-figure3.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 0d53ec9655ee282673b712b4a154821b0baa87dd23720a53d10f4e3f8ec015d6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:40:52,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:40:52,580 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:40:52,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:40:52,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:40:52,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:40:52,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:40:52,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:40:52,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:40:52,619 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:40:52,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:40:52,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:40:52,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:40:52,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:40:52,622 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:40:52,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:40:52,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:40:52,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:40:52,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:40:52,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:40:52,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:40:52,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:40:52,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:40:52,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:40:52,627 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:40:52,627 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:40:52,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:40:52,628 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:40:52,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:40:52,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:40:52,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:40:52,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:40:52,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:52,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:40:52,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:40:52,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:40:52,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:40:52,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:40:52,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:40:52,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:40:52,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:40:52,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:40:52,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d53ec9655ee282673b712b4a154821b0baa87dd23720a53d10f4e3f8ec015d6 [2024-11-20 09:40:52,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:40:52,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:40:53,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:40:53,001 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:40:53,001 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:40:53,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-11-20 09:40:54,549 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:40:54,723 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:40:54,724 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-11-20 09:40:54,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e9f1be0/123da930c93b4a179dc40a8638463e4b/FLAG0da004ed8 [2024-11-20 09:40:54,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e9f1be0/123da930c93b4a179dc40a8638463e4b [2024-11-20 09:40:54,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:40:54,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:40:54,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:54,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:40:54,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:40:54,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:54" (1/1) ... [2024-11-20 09:40:54,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3169e99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54, skipping insertion in model container [2024-11-20 09:40:54,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:54" (1/1) ... [2024-11-20 09:40:54,784 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:40:55,014 WARN L250 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-figure3.wvr.c[1946,1959] [2024-11-20 09:40:55,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:55,030 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:40:55,050 WARN L250 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-figure3.wvr.c[1946,1959] [2024-11-20 09:40:55,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:55,072 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:40:55,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55 WrapperNode [2024-11-20 09:40:55,073 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:55,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:55,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:40:55,075 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:40:55,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,112 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2024-11-20 09:40:55,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:55,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:40:55,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:40:55,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:40:55,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,149 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]. [2024-11-20 09:40:55,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:40:55,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:40:55,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:40:55,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:40:55,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (1/1) ... [2024-11-20 09:40:55,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:55,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:55,212 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) [2024-11-20 09:40:55,214 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 [2024-11-20 09:40:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:40:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:40:55,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:40:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:40:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:40:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:40:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:40:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:40:55,320 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:40:55,395 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:40:55,397 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:40:55,569 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:40:55,569 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:40:55,692 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:40:55,692 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 09:40:55,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:55 BoogieIcfgContainer [2024-11-20 09:40:55,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:40:55,695 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:40:55,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:40:55,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:40:55,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:40:54" (1/3) ... [2024-11-20 09:40:55,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c42190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:55, skipping insertion in model container [2024-11-20 09:40:55,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:55" (2/3) ... [2024-11-20 09:40:55,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c42190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:55, skipping insertion in model container [2024-11-20 09:40:55,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:55" (3/3) ... [2024-11-20 09:40:55,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-11-20 09:40:55,721 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:40:55,722 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:40:55,722 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:40:55,789 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:40:55,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-20 09:40:55,864 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-20 09:40:55,864 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:55,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-20 09:40:55,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-20 09:40:55,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-20 09:40:55,880 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:40:55,894 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;@6e451f2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:40:55,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:40:55,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:40:55,912 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-20 09:40:55,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:55,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:55,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:55,914 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:55,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1255077345, now seen corresponding path program 1 times [2024-11-20 09:40:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673560334] [2024-11-20 09:40:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673560334] [2024-11-20 09:40:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673560334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:40:56,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914600667] [2024-11-20 09:40:56,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:56,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:40:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:40:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:40:56,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-20 09:40:56,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-11-20 09:40:56,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:56,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-20 09:40:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:56,601 INFO L124 PetriNetUnfolderBase]: 86/169 cut-off events. [2024-11-20 09:40:56,601 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-20 09:40:56,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 169 events. 86/169 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 499 event pairs, 32 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 298. Up to 108 conditions per place. [2024-11-20 09:40:56,605 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-20 09:40:56,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 129 flow [2024-11-20 09:40:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:40:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:40:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-20 09:40:56,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-20 09:40:56,623 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 40 transitions. [2024-11-20 09:40:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 129 flow [2024-11-20 09:40:56,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:56,628 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-11-20 09:40:56,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-20 09:40:56,636 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-11-20 09:40:56,636 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-11-20 09:40:56,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-11-20 09:40:56,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:56,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:56,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:40:56,637 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:56,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 930887173, now seen corresponding path program 1 times [2024-11-20 09:40:56,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:56,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155542946] [2024-11-20 09:40:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:56,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:56,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:56,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155542946] [2024-11-20 09:40:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155542946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:56,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:56,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867290409] [2024-11-20 09:40:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:56,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:56,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:56,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:56,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:56,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:56,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:57,023 INFO L124 PetriNetUnfolderBase]: 98/200 cut-off events. [2024-11-20 09:40:57,023 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 09:40:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 200 events. 98/200 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 744 event pairs, 45 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 155. Up to 133 conditions per place. [2024-11-20 09:40:57,028 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 6 changer transitions 1/39 dead transitions. [2024-11-20 09:40:57,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 170 flow [2024-11-20 09:40:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-11-20 09:40:57,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-11-20 09:40:57,033 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 61 transitions. [2024-11-20 09:40:57,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 170 flow [2024-11-20 09:40:57,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:40:57,036 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 97 flow [2024-11-20 09:40:57,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-20 09:40:57,037 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-20 09:40:57,037 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 97 flow [2024-11-20 09:40:57,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:57,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:57,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:57,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:40:57,039 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:57,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1774096965, now seen corresponding path program 2 times [2024-11-20 09:40:57,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697016983] [2024-11-20 09:40:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:57,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697016983] [2024-11-20 09:40:57,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697016983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:57,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:57,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:40:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906339650] [2024-11-20 09:40:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:57,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:40:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:40:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:40:57,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2024-11-20 09:40:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:57,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:57,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:57,436 INFO L124 PetriNetUnfolderBase]: 109/222 cut-off events. [2024-11-20 09:40:57,437 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-11-20 09:40:57,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 222 events. 109/222 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 836 event pairs, 4 based on Foata normal form. 7/213 useless extension candidates. Maximal degree in co-relation 406. Up to 94 conditions per place. [2024-11-20 09:40:57,440 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-11-20 09:40:57,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 269 flow [2024-11-20 09:40:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:40:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:40:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-11-20 09:40:57,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-11-20 09:40:57,446 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 97 flow. Second operand 7 states and 82 transitions. [2024-11-20 09:40:57,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 269 flow [2024-11-20 09:40:57,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 267 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 09:40:57,451 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 131 flow [2024-11-20 09:40:57,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-11-20 09:40:57,452 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2024-11-20 09:40:57,453 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 131 flow [2024-11-20 09:40:57,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2024-11-20 09:40:57,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:57,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:57,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:40:57,455 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:57,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1332688077, now seen corresponding path program 3 times [2024-11-20 09:40:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027487822] [2024-11-20 09:40:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:57,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:57,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:57,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027487822] [2024-11-20 09:40:57,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027487822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:57,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:57,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:57,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930962993] [2024-11-20 09:40:57,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:57,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:57,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:57,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:57,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:57,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:57,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:57,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:57,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:57,725 INFO L124 PetriNetUnfolderBase]: 148/303 cut-off events. [2024-11-20 09:40:57,725 INFO L125 PetriNetUnfolderBase]: For 449/451 co-relation queries the response was YES. [2024-11-20 09:40:57,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 303 events. 148/303 cut-off events. For 449/451 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1189 event pairs, 55 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 479. Up to 137 conditions per place. [2024-11-20 09:40:57,731 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 34 selfloop transitions, 7 changer transitions 2/47 dead transitions. [2024-11-20 09:40:57,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 308 flow [2024-11-20 09:40:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-20 09:40:57,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-20 09:40:57,733 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 131 flow. Second operand 5 states and 60 transitions. [2024-11-20 09:40:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 308 flow [2024-11-20 09:40:57,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 286 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:57,741 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 163 flow [2024-11-20 09:40:57,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2024-11-20 09:40:57,743 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2024-11-20 09:40:57,744 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 163 flow [2024-11-20 09:40:57,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:57,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:57,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:57,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:40:57,745 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:57,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2131557781, now seen corresponding path program 4 times [2024-11-20 09:40:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962842340] [2024-11-20 09:40:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:57,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:57,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962842340] [2024-11-20 09:40:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962842340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:57,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899554805] [2024-11-20 09:40:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:40:57,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:57,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:57,889 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) [2024-11-20 09:40:57,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:40:57,949 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:40:57,950 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:57,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:57,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:58,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899554805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:58,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-20 09:40:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919522459] [2024-11-20 09:40:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:58,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:40:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:40:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:40:58,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:58,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 163 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2024-11-20 09:40:58,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:58,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:58,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:58,362 INFO L124 PetriNetUnfolderBase]: 233/470 cut-off events. [2024-11-20 09:40:58,363 INFO L125 PetriNetUnfolderBase]: For 952/960 co-relation queries the response was YES. [2024-11-20 09:40:58,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 470 events. 233/470 cut-off events. For 952/960 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2174 event pairs, 33 based on Foata normal form. 17/485 useless extension candidates. Maximal degree in co-relation 894. Up to 161 conditions per place. [2024-11-20 09:40:58,368 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 41 selfloop transitions, 31 changer transitions 2/78 dead transitions. [2024-11-20 09:40:58,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 78 transitions, 566 flow [2024-11-20 09:40:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:40:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:40:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-11-20 09:40:58,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-20 09:40:58,372 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 163 flow. Second operand 10 states and 116 transitions. [2024-11-20 09:40:58,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 78 transitions, 566 flow [2024-11-20 09:40:58,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 534 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-20 09:40:58,381 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 414 flow [2024-11-20 09:40:58,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=414, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-11-20 09:40:58,385 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 29 predicate places. [2024-11-20 09:40:58,385 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 414 flow [2024-11-20 09:40:58,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2024-11-20 09:40:58,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:58,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:58,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:40:58,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:58,590 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:58,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -803832281, now seen corresponding path program 5 times [2024-11-20 09:40:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273630084] [2024-11-20 09:40:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:58,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273630084] [2024-11-20 09:40:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273630084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414597357] [2024-11-20 09:40:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:58,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:58,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:58,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 414 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:58,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:58,871 INFO L124 PetriNetUnfolderBase]: 224/450 cut-off events. [2024-11-20 09:40:58,873 INFO L125 PetriNetUnfolderBase]: For 2196/2196 co-relation queries the response was YES. [2024-11-20 09:40:58,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 450 events. 224/450 cut-off events. For 2196/2196 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2048 event pairs, 64 based on Foata normal form. 2/449 useless extension candidates. Maximal degree in co-relation 1481. Up to 190 conditions per place. [2024-11-20 09:40:58,880 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2024-11-20 09:40:58,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 627 flow [2024-11-20 09:40:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-11-20 09:40:58,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-20 09:40:58,882 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 414 flow. Second operand 5 states and 58 transitions. [2024-11-20 09:40:58,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 627 flow [2024-11-20 09:40:58,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 597 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-11-20 09:40:58,893 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 460 flow [2024-11-20 09:40:58,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=460, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-20 09:40:58,894 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2024-11-20 09:40:58,895 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 460 flow [2024-11-20 09:40:58,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:40:58,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:58,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:58,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:40:58,896 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:58,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 936086857, now seen corresponding path program 6 times [2024-11-20 09:40:58,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:58,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901329831] [2024-11-20 09:40:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:58,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:59,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901329831] [2024-11-20 09:40:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901329831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:59,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:40:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004521640] [2024-11-20 09:40:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:59,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:40:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:40:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:40:59,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:40:59,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 460 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2024-11-20 09:40:59,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:59,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:40:59,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:59,159 INFO L124 PetriNetUnfolderBase]: 219/431 cut-off events. [2024-11-20 09:40:59,160 INFO L125 PetriNetUnfolderBase]: For 2273/2273 co-relation queries the response was YES. [2024-11-20 09:40:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 431 events. 219/431 cut-off events. For 2273/2273 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1852 event pairs, 53 based on Foata normal form. 7/435 useless extension candidates. Maximal degree in co-relation 1545. Up to 170 conditions per place. [2024-11-20 09:40:59,166 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 40 selfloop transitions, 22 changer transitions 0/66 dead transitions. [2024-11-20 09:40:59,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 639 flow [2024-11-20 09:40:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:40:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:40:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-11-20 09:40:59,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-11-20 09:40:59,168 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 460 flow. Second operand 6 states and 67 transitions. [2024-11-20 09:40:59,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 639 flow [2024-11-20 09:40:59,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 593 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 09:40:59,176 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 470 flow [2024-11-20 09:40:59,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-11-20 09:40:59,178 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2024-11-20 09:40:59,178 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 470 flow [2024-11-20 09:40:59,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2024-11-20 09:40:59,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:59,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:59,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:40:59,179 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:59,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash 190174668, now seen corresponding path program 1 times [2024-11-20 09:40:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154041032] [2024-11-20 09:40:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:59,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154041032] [2024-11-20 09:40:59,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154041032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925301547] [2024-11-20 09:40:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:59,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:59,291 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) [2024-11-20 09:40:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:40:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:59,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 09:40:59,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:40:59,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:40:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925301547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:59,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-20 09:40:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201735996] [2024-11-20 09:40:59,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:59,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:40:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:40:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:40:59,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-20 09:40:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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) [2024-11-20 09:40:59,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:59,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-20 09:40:59,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:59,634 INFO L124 PetriNetUnfolderBase]: 504/933 cut-off events. [2024-11-20 09:40:59,635 INFO L125 PetriNetUnfolderBase]: For 3797/3869 co-relation queries the response was YES. [2024-11-20 09:40:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 933 events. 504/933 cut-off events. For 3797/3869 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4505 event pairs, 91 based on Foata normal form. 11/943 useless extension candidates. Maximal degree in co-relation 2575. Up to 437 conditions per place. [2024-11-20 09:40:59,646 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 78 selfloop transitions, 5 changer transitions 8/98 dead transitions. [2024-11-20 09:40:59,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 992 flow [2024-11-20 09:40:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:40:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:40:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-20 09:40:59,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-20 09:40:59,648 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 470 flow. Second operand 4 states and 60 transitions. [2024-11-20 09:40:59,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 992 flow [2024-11-20 09:40:59,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 934 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:59,658 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 458 flow [2024-11-20 09:40:59,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=458, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-20 09:40:59,659 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2024-11-20 09:40:59,659 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 458 flow [2024-11-20 09:40:59,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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) [2024-11-20 09:40:59,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:59,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:59,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:40:59,860 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,SelfDestructingSolverStorable7 [2024-11-20 09:40:59,861 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:59,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1469559476, now seen corresponding path program 2 times [2024-11-20 09:40:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:59,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018337767] [2024-11-20 09:40:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018337767] [2024-11-20 09:41:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018337767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984133499] [2024-11-20 09:41:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:41:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:00,024 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) [2024-11-20 09:41:00,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:41:00,077 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:00,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:00,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:00,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:00,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984133499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:00,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872424970] [2024-11-20 09:41:00,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:00,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:00,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 458 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 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) [2024-11-20 09:41:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:00,933 INFO L124 PetriNetUnfolderBase]: 884/1584 cut-off events. [2024-11-20 09:41:00,934 INFO L125 PetriNetUnfolderBase]: For 6507/6529 co-relation queries the response was YES. [2024-11-20 09:41:00,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6978 conditions, 1584 events. 884/1584 cut-off events. For 6507/6529 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7974 event pairs, 60 based on Foata normal form. 36/1614 useless extension candidates. Maximal degree in co-relation 4354. Up to 535 conditions per place. [2024-11-20 09:41:00,955 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 85 selfloop transitions, 85 changer transitions 7/184 dead transitions. [2024-11-20 09:41:00,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 184 transitions, 1766 flow [2024-11-20 09:41:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 09:41:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 09:41:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 235 transitions. [2024-11-20 09:41:00,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086580086580087 [2024-11-20 09:41:00,958 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 458 flow. Second operand 21 states and 235 transitions. [2024-11-20 09:41:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 184 transitions, 1766 flow [2024-11-20 09:41:00,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 184 transitions, 1766 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:41:00,971 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 1253 flow [2024-11-20 09:41:00,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1253, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-11-20 09:41:00,971 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 65 predicate places. [2024-11-20 09:41:00,972 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 1253 flow [2024-11-20 09:41:00,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 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) [2024-11-20 09:41:00,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:00,972 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:00,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:41:01,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:01,177 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:01,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1603205862, now seen corresponding path program 3 times [2024-11-20 09:41:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:01,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125410883] [2024-11-20 09:41:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:01,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125410883] [2024-11-20 09:41:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125410883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184716029] [2024-11-20 09:41:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:41:01,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:01,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:01,345 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) [2024-11-20 09:41:01,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:41:01,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:41:01,408 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:01,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:01,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:01,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184716029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:01,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970495377] [2024-11-20 09:41:01,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:01,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:01,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:01,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:01,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 1253 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:01,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:01,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:01,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:02,084 INFO L124 PetriNetUnfolderBase]: 955/1751 cut-off events. [2024-11-20 09:41:02,084 INFO L125 PetriNetUnfolderBase]: For 15550/15592 co-relation queries the response was YES. [2024-11-20 09:41:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9486 conditions, 1751 events. 955/1751 cut-off events. For 15550/15592 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9391 event pairs, 138 based on Foata normal form. 48/1793 useless extension candidates. Maximal degree in co-relation 6418. Up to 718 conditions per place. [2024-11-20 09:41:02,132 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 103 selfloop transitions, 72 changer transitions 10/192 dead transitions. [2024-11-20 09:41:02,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 192 transitions, 2326 flow [2024-11-20 09:41:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:41:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:41:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 160 transitions. [2024-11-20 09:41:02,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-20 09:41:02,134 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 1253 flow. Second operand 15 states and 160 transitions. [2024-11-20 09:41:02,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 192 transitions, 2326 flow [2024-11-20 09:41:02,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 192 transitions, 2133 flow, removed 88 selfloop flow, removed 2 redundant places. [2024-11-20 09:41:02,163 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1672 flow [2024-11-20 09:41:02,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1672, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-11-20 09:41:02,164 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 87 predicate places. [2024-11-20 09:41:02,164 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1672 flow [2024-11-20 09:41:02,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:02,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:02,164 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:02,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:02,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:02,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:02,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1652969234, now seen corresponding path program 4 times [2024-11-20 09:41:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:02,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819520185] [2024-11-20 09:41:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819520185] [2024-11-20 09:41:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819520185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473843294] [2024-11-20 09:41:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:41:02,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:02,549 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) [2024-11-20 09:41:02,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:41:02,600 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:41:02,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:02,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:02,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:02,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473843294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:02,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-20 09:41:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932684086] [2024-11-20 09:41:02,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:02,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:41:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:41:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:41:02,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1672 flow. Second operand has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 12 states have internal predecessors, (98), 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) [2024-11-20 09:41:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:03,580 INFO L124 PetriNetUnfolderBase]: 1297/2366 cut-off events. [2024-11-20 09:41:03,581 INFO L125 PetriNetUnfolderBase]: For 21248/21258 co-relation queries the response was YES. [2024-11-20 09:41:03,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13083 conditions, 2366 events. 1297/2366 cut-off events. For 21248/21258 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13416 event pairs, 45 based on Foata normal form. 54/2406 useless extension candidates. Maximal degree in co-relation 12760. Up to 713 conditions per place. [2024-11-20 09:41:03,613 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 104 selfloop transitions, 227 changer transitions 1/339 dead transitions. [2024-11-20 09:41:03,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 339 transitions, 4320 flow [2024-11-20 09:41:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:41:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:41:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 228 transitions. [2024-11-20 09:41:03,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-11-20 09:41:03,615 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1672 flow. Second operand 22 states and 228 transitions. [2024-11-20 09:41:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 339 transitions, 4320 flow [2024-11-20 09:41:03,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 339 transitions, 4205 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-11-20 09:41:03,692 INFO L231 Difference]: Finished difference. Result has 138 places, 277 transitions, 3970 flow [2024-11-20 09:41:03,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3970, PETRI_PLACES=138, PETRI_TRANSITIONS=277} [2024-11-20 09:41:03,693 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 114 predicate places. [2024-11-20 09:41:03,693 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 277 transitions, 3970 flow [2024-11-20 09:41:03,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 12 states have internal predecessors, (98), 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) [2024-11-20 09:41:03,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:03,694 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:03,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:41:03,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-20 09:41:03,899 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:03,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash 256189760, now seen corresponding path program 5 times [2024-11-20 09:41:03,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:03,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197604234] [2024-11-20 09:41:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:04,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197604234] [2024-11-20 09:41:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197604234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316795384] [2024-11-20 09:41:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:41:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:04,050 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) [2024-11-20 09:41:04,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:41:04,094 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:04,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:04,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:41:04,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:04,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316795384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:04,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:04,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 09:41:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524699857] [2024-11-20 09:41:04,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:04,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:41:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:41:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:41:04,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:04,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 277 transitions, 3970 flow. Second operand has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 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) [2024-11-20 09:41:04,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:04,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:04,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:05,993 INFO L124 PetriNetUnfolderBase]: 1786/3275 cut-off events. [2024-11-20 09:41:05,994 INFO L125 PetriNetUnfolderBase]: For 38639/38673 co-relation queries the response was YES. [2024-11-20 09:41:06,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21206 conditions, 3275 events. 1786/3275 cut-off events. For 38639/38673 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20144 event pairs, 58 based on Foata normal form. 134/3389 useless extension candidates. Maximal degree in co-relation 20836. Up to 968 conditions per place. [2024-11-20 09:41:06,038 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 120 selfloop transitions, 388 changer transitions 3/518 dead transitions. [2024-11-20 09:41:06,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 518 transitions, 7966 flow [2024-11-20 09:41:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-20 09:41:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-20 09:41:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 333 transitions. [2024-11-20 09:41:06,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4451871657754011 [2024-11-20 09:41:06,042 INFO L175 Difference]: Start difference. First operand has 138 places, 277 transitions, 3970 flow. Second operand 34 states and 333 transitions. [2024-11-20 09:41:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 518 transitions, 7966 flow [2024-11-20 09:41:06,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 518 transitions, 7109 flow, removed 351 selfloop flow, removed 3 redundant places. [2024-11-20 09:41:06,255 INFO L231 Difference]: Finished difference. Result has 185 places, 432 transitions, 6911 flow [2024-11-20 09:41:06,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6911, PETRI_PLACES=185, PETRI_TRANSITIONS=432} [2024-11-20 09:41:06,256 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 161 predicate places. [2024-11-20 09:41:06,257 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 432 transitions, 6911 flow [2024-11-20 09:41:06,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 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) [2024-11-20 09:41:06,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:06,257 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:06,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 09:41:06,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:06,458 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:06,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -428851868, now seen corresponding path program 6 times [2024-11-20 09:41:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667917001] [2024-11-20 09:41:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:06,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:06,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667917001] [2024-11-20 09:41:06,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667917001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:06,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377182212] [2024-11-20 09:41:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:41:06,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:06,576 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) [2024-11-20 09:41:06,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:41:06,623 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:41:06,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:06,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:06,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:06,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:06,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377182212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:06,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:06,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-20 09:41:06,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372614411] [2024-11-20 09:41:06,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:06,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:41:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:41:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:41:06,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:06,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 432 transitions, 6911 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 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) [2024-11-20 09:41:06,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:06,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:06,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:08,409 INFO L124 PetriNetUnfolderBase]: 2246/4163 cut-off events. [2024-11-20 09:41:08,409 INFO L125 PetriNetUnfolderBase]: For 60221/60253 co-relation queries the response was YES. [2024-11-20 09:41:08,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29228 conditions, 4163 events. 2246/4163 cut-off events. For 60221/60253 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26964 event pairs, 103 based on Foata normal form. 52/4191 useless extension candidates. Maximal degree in co-relation 28253. Up to 817 conditions per place. [2024-11-20 09:41:08,459 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 143 selfloop transitions, 490 changer transitions 2/642 dead transitions. [2024-11-20 09:41:08,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 642 transitions, 11087 flow [2024-11-20 09:41:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-20 09:41:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-20 09:41:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 334 transitions. [2024-11-20 09:41:08,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46005509641873277 [2024-11-20 09:41:08,462 INFO L175 Difference]: Start difference. First operand has 185 places, 432 transitions, 6911 flow. Second operand 33 states and 334 transitions. [2024-11-20 09:41:08,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 642 transitions, 11087 flow [2024-11-20 09:41:08,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 642 transitions, 10174 flow, removed 267 selfloop flow, removed 9 redundant places. [2024-11-20 09:41:08,829 INFO L231 Difference]: Finished difference. Result has 216 places, 570 transitions, 9758 flow [2024-11-20 09:41:08,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6207, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9758, PETRI_PLACES=216, PETRI_TRANSITIONS=570} [2024-11-20 09:41:08,830 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 192 predicate places. [2024-11-20 09:41:08,830 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 570 transitions, 9758 flow [2024-11-20 09:41:08,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 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) [2024-11-20 09:41:08,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:08,831 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:08,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:09,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:09,032 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:09,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1521188572, now seen corresponding path program 7 times [2024-11-20 09:41:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:09,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852014388] [2024-11-20 09:41:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:09,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:09,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852014388] [2024-11-20 09:41:09,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852014388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901681137] [2024-11-20 09:41:09,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:41:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:09,157 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) [2024-11-20 09:41:09,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:41:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:09,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:09,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:09,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:09,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901681137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:09,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:09,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-20 09:41:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671059586] [2024-11-20 09:41:09,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:09,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:41:09,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:41:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:41:09,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:09,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 570 transitions, 9758 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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) [2024-11-20 09:41:09,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:09,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:09,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:10,899 INFO L124 PetriNetUnfolderBase]: 2516/4606 cut-off events. [2024-11-20 09:41:10,900 INFO L125 PetriNetUnfolderBase]: For 77323/77337 co-relation queries the response was YES. [2024-11-20 09:41:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34619 conditions, 4606 events. 2516/4606 cut-off events. For 77323/77337 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29533 event pairs, 164 based on Foata normal form. 16/4598 useless extension candidates. Maximal degree in co-relation 34113. Up to 923 conditions per place. [2024-11-20 09:41:10,963 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 187 selfloop transitions, 497 changer transitions 2/693 dead transitions. [2024-11-20 09:41:10,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 693 transitions, 13046 flow [2024-11-20 09:41:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 09:41:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-20 09:41:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 254 transitions. [2024-11-20 09:41:10,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5019762845849802 [2024-11-20 09:41:10,965 INFO L175 Difference]: Start difference. First operand has 216 places, 570 transitions, 9758 flow. Second operand 23 states and 254 transitions. [2024-11-20 09:41:10,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 693 transitions, 13046 flow [2024-11-20 09:41:11,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 693 transitions, 12836 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-11-20 09:41:11,572 INFO L231 Difference]: Finished difference. Result has 236 places, 632 transitions, 12061 flow [2024-11-20 09:41:11,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9447, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12061, PETRI_PLACES=236, PETRI_TRANSITIONS=632} [2024-11-20 09:41:11,573 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 212 predicate places. [2024-11-20 09:41:11,573 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 632 transitions, 12061 flow [2024-11-20 09:41:11,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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) [2024-11-20 09:41:11,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:11,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:11,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 09:41:11,774 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,SelfDestructingSolverStorable13 [2024-11-20 09:41:11,774 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:11,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:11,775 INFO L85 PathProgramCache]: Analyzing trace with hash 393602174, now seen corresponding path program 8 times [2024-11-20 09:41:11,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:11,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15685071] [2024-11-20 09:41:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:11,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15685071] [2024-11-20 09:41:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15685071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929002164] [2024-11-20 09:41:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:41:11,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:11,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:11,912 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) [2024-11-20 09:41:11,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:41:11,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:11,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:11,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:11,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:12,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929002164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:12,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:12,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-20 09:41:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385827733] [2024-11-20 09:41:12,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:12,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:41:12,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:41:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:41:12,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:12,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 632 transitions, 12061 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 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) [2024-11-20 09:41:12,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:12,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:12,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:14,021 INFO L124 PetriNetUnfolderBase]: 3221/5886 cut-off events. [2024-11-20 09:41:14,021 INFO L125 PetriNetUnfolderBase]: For 118532/118582 co-relation queries the response was YES. [2024-11-20 09:41:14,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47307 conditions, 5886 events. 3221/5886 cut-off events. For 118532/118582 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 39374 event pairs, 233 based on Foata normal form. 78/5932 useless extension candidates. Maximal degree in co-relation 46508. Up to 1209 conditions per place. [2024-11-20 09:41:14,090 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 205 selfloop transitions, 664 changer transitions 5/881 dead transitions. [2024-11-20 09:41:14,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 881 transitions, 18275 flow [2024-11-20 09:41:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 09:41:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-20 09:41:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 255 transitions. [2024-11-20 09:41:14,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-20 09:41:14,092 INFO L175 Difference]: Start difference. First operand has 236 places, 632 transitions, 12061 flow. Second operand 25 states and 255 transitions. [2024-11-20 09:41:14,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 881 transitions, 18275 flow [2024-11-20 09:41:14,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 881 transitions, 17782 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-11-20 09:41:14,974 INFO L231 Difference]: Finished difference. Result has 262 places, 831 transitions, 18098 flow [2024-11-20 09:41:14,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11672, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18098, PETRI_PLACES=262, PETRI_TRANSITIONS=831} [2024-11-20 09:41:14,975 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 238 predicate places. [2024-11-20 09:41:14,975 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 831 transitions, 18098 flow [2024-11-20 09:41:14,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 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) [2024-11-20 09:41:14,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:14,975 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:14,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:41:15,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 09:41:15,176 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:15,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1850756804, now seen corresponding path program 9 times [2024-11-20 09:41:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77684185] [2024-11-20 09:41:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:15,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77684185] [2024-11-20 09:41:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77684185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690895478] [2024-11-20 09:41:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:41:15,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:15,344 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) [2024-11-20 09:41:15,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:41:15,393 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:41:15,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:15,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:15,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:15,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:15,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690895478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:15,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:15,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258735266] [2024-11-20 09:41:15,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:15,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:15,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:15,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 831 transitions, 18098 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:15,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:15,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:15,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:17,152 INFO L124 PetriNetUnfolderBase]: 3225/5910 cut-off events. [2024-11-20 09:41:17,152 INFO L125 PetriNetUnfolderBase]: For 144289/144307 co-relation queries the response was YES. [2024-11-20 09:41:17,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51900 conditions, 5910 events. 3225/5910 cut-off events. For 144289/144307 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 39744 event pairs, 437 based on Foata normal form. 10/5892 useless extension candidates. Maximal degree in co-relation 51154. Up to 2165 conditions per place. [2024-11-20 09:41:17,318 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 355 selfloop transitions, 491 changer transitions 3/856 dead transitions. [2024-11-20 09:41:17,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 856 transitions, 19972 flow [2024-11-20 09:41:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:41:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:41:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2024-11-20 09:41:17,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-11-20 09:41:17,320 INFO L175 Difference]: Start difference. First operand has 262 places, 831 transitions, 18098 flow. Second operand 14 states and 150 transitions. [2024-11-20 09:41:17,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 856 transitions, 19972 flow [2024-11-20 09:41:18,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 856 transitions, 19238 flow, removed 172 selfloop flow, removed 9 redundant places. [2024-11-20 09:41:18,438 INFO L231 Difference]: Finished difference. Result has 267 places, 831 transitions, 18368 flow [2024-11-20 09:41:18,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=17326, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18368, PETRI_PLACES=267, PETRI_TRANSITIONS=831} [2024-11-20 09:41:18,439 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 243 predicate places. [2024-11-20 09:41:18,439 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 831 transitions, 18368 flow [2024-11-20 09:41:18,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:18,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:18,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:18,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:18,640 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,SelfDestructingSolverStorable15 [2024-11-20 09:41:18,640 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:18,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash 866689910, now seen corresponding path program 10 times [2024-11-20 09:41:18,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:18,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924551506] [2024-11-20 09:41:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:18,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:18,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:18,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924551506] [2024-11-20 09:41:18,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924551506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:18,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142782769] [2024-11-20 09:41:18,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:41:18,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:18,770 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) [2024-11-20 09:41:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:41:18,815 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:41:18,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:18,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:18,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:18,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142782769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:19,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:19,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:19,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745092849] [2024-11-20 09:41:19,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:19,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:19,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 831 transitions, 18368 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-11-20 09:41:19,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:19,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:19,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:21,826 INFO L124 PetriNetUnfolderBase]: 3892/7224 cut-off events. [2024-11-20 09:41:21,826 INFO L125 PetriNetUnfolderBase]: For 172003/172057 co-relation queries the response was YES. [2024-11-20 09:41:21,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63077 conditions, 7224 events. 3892/7224 cut-off events. For 172003/172057 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 50689 event pairs, 317 based on Foata normal form. 123/7311 useless extension candidates. Maximal degree in co-relation 61401. Up to 1371 conditions per place. [2024-11-20 09:41:22,038 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 342 selfloop transitions, 816 changer transitions 0/1165 dead transitions. [2024-11-20 09:41:22,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1165 transitions, 27215 flow [2024-11-20 09:41:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-20 09:41:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-20 09:41:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 431 transitions. [2024-11-20 09:41:22,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45560253699788583 [2024-11-20 09:41:22,042 INFO L175 Difference]: Start difference. First operand has 267 places, 831 transitions, 18368 flow. Second operand 43 states and 431 transitions. [2024-11-20 09:41:22,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1165 transitions, 27215 flow [2024-11-20 09:41:23,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1165 transitions, 26325 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-20 09:41:23,323 INFO L231 Difference]: Finished difference. Result has 313 places, 1057 transitions, 25948 flow [2024-11-20 09:41:23,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=17609, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=25948, PETRI_PLACES=313, PETRI_TRANSITIONS=1057} [2024-11-20 09:41:23,324 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 289 predicate places. [2024-11-20 09:41:23,324 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 1057 transitions, 25948 flow [2024-11-20 09:41:23,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-11-20 09:41:23,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:23,325 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:23,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 09:41:23,525 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,SelfDestructingSolverStorable16 [2024-11-20 09:41:23,525 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:23,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2001842386, now seen corresponding path program 11 times [2024-11-20 09:41:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289050649] [2024-11-20 09:41:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289050649] [2024-11-20 09:41:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289050649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:23,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046776841] [2024-11-20 09:41:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:41:23,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:23,657 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) [2024-11-20 09:41:23,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:41:23,708 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:41:23,708 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:23,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:23,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:23,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046776841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:23,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:23,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883217252] [2024-11-20 09:41:23,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:23,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:23,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:23,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1057 transitions, 25948 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 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) [2024-11-20 09:41:23,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:23,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:23,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:26,046 INFO L124 PetriNetUnfolderBase]: 3947/7320 cut-off events. [2024-11-20 09:41:26,046 INFO L125 PetriNetUnfolderBase]: For 207000/207020 co-relation queries the response was YES. [2024-11-20 09:41:26,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69641 conditions, 7320 events. 3947/7320 cut-off events. For 207000/207020 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 51460 event pairs, 1060 based on Foata normal form. 10/7285 useless extension candidates. Maximal degree in co-relation 67989. Up to 5152 conditions per place. [2024-11-20 09:41:26,124 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 946 selfloop transitions, 162 changer transitions 7/1122 dead transitions. [2024-11-20 09:41:26,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1122 transitions, 29387 flow [2024-11-20 09:41:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:41:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:41:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 134 transitions. [2024-11-20 09:41:26,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-11-20 09:41:26,126 INFO L175 Difference]: Start difference. First operand has 313 places, 1057 transitions, 25948 flow. Second operand 14 states and 134 transitions. [2024-11-20 09:41:26,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1122 transitions, 29387 flow [2024-11-20 09:41:27,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1122 transitions, 29080 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-11-20 09:41:27,830 INFO L231 Difference]: Finished difference. Result has 321 places, 1083 transitions, 26830 flow [2024-11-20 09:41:27,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=25644, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26830, PETRI_PLACES=321, PETRI_TRANSITIONS=1083} [2024-11-20 09:41:27,831 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 297 predicate places. [2024-11-20 09:41:27,831 INFO L471 AbstractCegarLoop]: Abstraction has has 321 places, 1083 transitions, 26830 flow [2024-11-20 09:41:27,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 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) [2024-11-20 09:41:27,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:27,831 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:27,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:28,032 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,SelfDestructingSolverStorable17 [2024-11-20 09:41:28,032 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:28,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 368112322, now seen corresponding path program 12 times [2024-11-20 09:41:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:28,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118158508] [2024-11-20 09:41:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:28,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:28,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118158508] [2024-11-20 09:41:28,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118158508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710856479] [2024-11-20 09:41:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:41:28,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:28,136 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) [2024-11-20 09:41:28,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:41:28,182 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:41:28,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:28,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:28,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:28,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:28,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710856479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:28,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142489019] [2024-11-20 09:41:28,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:28,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:28,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:28,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:28,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1083 transitions, 26830 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-11-20 09:41:28,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:28,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:28,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:33,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-20 09:41:36,104 INFO L124 PetriNetUnfolderBase]: 5097/9477 cut-off events. [2024-11-20 09:41:36,105 INFO L125 PetriNetUnfolderBase]: For 286773/286809 co-relation queries the response was YES. [2024-11-20 09:41:36,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91650 conditions, 9477 events. 5097/9477 cut-off events. For 286773/286809 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 70608 event pairs, 569 based on Foata normal form. 108/9530 useless extension candidates. Maximal degree in co-relation 90447. Up to 2958 conditions per place. [2024-11-20 09:41:36,213 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 822 selfloop transitions, 742 changer transitions 1/1572 dead transitions. [2024-11-20 09:41:36,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1572 transitions, 41293 flow [2024-11-20 09:41:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-20 09:41:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-20 09:41:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 367 transitions. [2024-11-20 09:41:36,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633838383838384 [2024-11-20 09:41:36,215 INFO L175 Difference]: Start difference. First operand has 321 places, 1083 transitions, 26830 flow. Second operand 36 states and 367 transitions. [2024-11-20 09:41:36,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1572 transitions, 41293 flow [2024-11-20 09:41:39,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1572 transitions, 41155 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-11-20 09:41:39,278 INFO L231 Difference]: Finished difference. Result has 364 places, 1381 transitions, 37461 flow [2024-11-20 09:41:39,279 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26582, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=37461, PETRI_PLACES=364, PETRI_TRANSITIONS=1381} [2024-11-20 09:41:39,279 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 340 predicate places. [2024-11-20 09:41:39,279 INFO L471 AbstractCegarLoop]: Abstraction has has 364 places, 1381 transitions, 37461 flow [2024-11-20 09:41:39,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-11-20 09:41:39,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:39,280 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:39,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:39,481 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:39,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1202183656, now seen corresponding path program 13 times [2024-11-20 09:41:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730860094] [2024-11-20 09:41:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730860094] [2024-11-20 09:41:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730860094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874708913] [2024-11-20 09:41:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:41:39,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:39,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:39,585 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) [2024-11-20 09:41:39,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 09:41:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:39,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:39,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:39,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874708913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:39,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:39,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:39,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19753694] [2024-11-20 09:41:39,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:39,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:39,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:39,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:39,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1381 transitions, 37461 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:39,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:39,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:44,756 INFO L124 PetriNetUnfolderBase]: 6403/11829 cut-off events. [2024-11-20 09:41:44,756 INFO L125 PetriNetUnfolderBase]: For 433148/433220 co-relation queries the response was YES. [2024-11-20 09:41:44,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123493 conditions, 11829 events. 6403/11829 cut-off events. For 433148/433220 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 90730 event pairs, 1212 based on Foata normal form. 44/11798 useless extension candidates. Maximal degree in co-relation 122601. Up to 6303 conditions per place. [2024-11-20 09:41:44,922 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 993 selfloop transitions, 815 changer transitions 0/1815 dead transitions. [2024-11-20 09:41:44,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1815 transitions, 52782 flow [2024-11-20 09:41:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:41:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:41:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 210 transitions. [2024-11-20 09:41:44,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-20 09:41:44,923 INFO L175 Difference]: Start difference. First operand has 364 places, 1381 transitions, 37461 flow. Second operand 20 states and 210 transitions. [2024-11-20 09:41:44,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1815 transitions, 52782 flow [2024-11-20 09:41:50,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1815 transitions, 52030 flow, removed 312 selfloop flow, removed 5 redundant places. [2024-11-20 09:41:50,482 INFO L231 Difference]: Finished difference. Result has 386 places, 1755 transitions, 50154 flow [2024-11-20 09:41:50,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=36881, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=50154, PETRI_PLACES=386, PETRI_TRANSITIONS=1755} [2024-11-20 09:41:50,484 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 362 predicate places. [2024-11-20 09:41:50,484 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 1755 transitions, 50154 flow [2024-11-20 09:41:50,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:41:50,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:50,484 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:50,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 09:41:50,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:50,689 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:50,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -253133310, now seen corresponding path program 14 times [2024-11-20 09:41:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667361301] [2024-11-20 09:41:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667361301] [2024-11-20 09:41:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667361301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205007578] [2024-11-20 09:41:50,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:41:50,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:50,849 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) [2024-11-20 09:41:50,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 09:41:50,897 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:50,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:50,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:41:50,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:50,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205007578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:51,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-20 09:41:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205228620] [2024-11-20 09:41:51,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:51,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:41:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:41:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:41:51,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:41:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1755 transitions, 50154 flow. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2024-11-20 09:41:51,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:51,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:41:51,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:57,367 INFO L124 PetriNetUnfolderBase]: 7013/12954 cut-off events. [2024-11-20 09:41:57,367 INFO L125 PetriNetUnfolderBase]: For 512023/512081 co-relation queries the response was YES. [2024-11-20 09:41:57,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140843 conditions, 12954 events. 7013/12954 cut-off events. For 512023/512081 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 100906 event pairs, 763 based on Foata normal form. 43/12920 useless extension candidates. Maximal degree in co-relation 139823. Up to 4296 conditions per place. [2024-11-20 09:41:57,558 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 823 selfloop transitions, 1117 changer transitions 4/1951 dead transitions. [2024-11-20 09:41:57,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1951 transitions, 59088 flow [2024-11-20 09:41:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:41:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:41:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 204 transitions. [2024-11-20 09:41:57,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-20 09:41:57,559 INFO L175 Difference]: Start difference. First operand has 386 places, 1755 transitions, 50154 flow. Second operand 20 states and 204 transitions. [2024-11-20 09:41:57,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1951 transitions, 59088 flow [2024-11-20 09:42:04,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1951 transitions, 58513 flow, removed 198 selfloop flow, removed 5 redundant places. [2024-11-20 09:42:04,389 INFO L231 Difference]: Finished difference. Result has 408 places, 1907 transitions, 57915 flow [2024-11-20 09:42:04,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=49556, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=970, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=57915, PETRI_PLACES=408, PETRI_TRANSITIONS=1907} [2024-11-20 09:42:04,391 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 384 predicate places. [2024-11-20 09:42:04,391 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 1907 transitions, 57915 flow [2024-11-20 09:42:04,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2024-11-20 09:42:04,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:04,392 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:04,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 09:42:04,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:04,593 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:42:04,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:04,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2018765298, now seen corresponding path program 15 times [2024-11-20 09:42:04,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:04,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543033854] [2024-11-20 09:42:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543033854] [2024-11-20 09:42:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543033854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:42:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973970763] [2024-11-20 09:42:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:42:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:04,749 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) [2024-11-20 09:42:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 09:42:04,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:42:04,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:42:04,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:42:04,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:42:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:04,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:42:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:04,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973970763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:42:04,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:42:04,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:42:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554441820] [2024-11-20 09:42:04,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:42:04,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:42:04,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:42:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:42:04,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-20 09:42:04,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1907 transitions, 57915 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:42:04,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:04,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-20 09:42:04,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:11,911 INFO L124 PetriNetUnfolderBase]: 7004/12941 cut-off events. [2024-11-20 09:42:11,912 INFO L125 PetriNetUnfolderBase]: For 581730/581812 co-relation queries the response was YES. [2024-11-20 09:42:12,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148313 conditions, 12941 events. 7004/12941 cut-off events. For 581730/581812 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 100783 event pairs, 1530 based on Foata normal form. 38/12900 useless extension candidates. Maximal degree in co-relation 147213. Up to 7948 conditions per place. [2024-11-20 09:42:12,156 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 1342 selfloop transitions, 579 changer transitions 3/1931 dead transitions. [2024-11-20 09:42:12,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1931 transitions, 62124 flow [2024-11-20 09:42:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:42:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:42:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-11-20 09:42:12,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-11-20 09:42:12,158 INFO L175 Difference]: Start difference. First operand has 408 places, 1907 transitions, 57915 flow. Second operand 12 states and 124 transitions. [2024-11-20 09:42:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1931 transitions, 62124 flow [2024-11-20 09:42:19,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1931 transitions, 61719 flow, removed 125 selfloop flow, removed 7 redundant places.