./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/chl-array-int-symm.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/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:34:51,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:34:52,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:34:52,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:34:52,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:34:52,023 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:34:52,024 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:34:52,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:34:52,025 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:34:52,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:34:52,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:34:52,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:34:52,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:34:52,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:34:52,028 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:34:52,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:34:52,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:34:52,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:34:52,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:34:52,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:34:52,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:34:52,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:34:52,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:34:52,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:34:52,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:34:52,032 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:34:52,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:34:52,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:34:52,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:34:52,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:34:52,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:34:52,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:34:52,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:34:52,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:34:52,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:34:52,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:34:52,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:34:52,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:34:52,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:34:52,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:34:52,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:34:52,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:34:52,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-11-20 09:34:52,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:34:52,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:34:52,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:34:52,289 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:34:52,290 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:34:52,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-20 09:34:53,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:34:53,989 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:34:53,990 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-20 09:34:53,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925980917/7c35641402d54c18ae5b55bbca33c770/FLAG76944bfe9 [2024-11-20 09:34:54,361 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925980917/7c35641402d54c18ae5b55bbca33c770 [2024-11-20 09:34:54,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:34:54,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:34:54,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:34:54,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:34:54,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:34:54,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558b3712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54, skipping insertion in model container [2024-11-20 09:34:54,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,404 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:34:54,625 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/chl-array-int-symm.wvr.c[2508,2521] [2024-11-20 09:34:54,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:34:54,654 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:34:54,683 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/chl-array-int-symm.wvr.c[2508,2521] [2024-11-20 09:34:54,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:34:54,706 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:34:54,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54 WrapperNode [2024-11-20 09:34:54,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:34:54,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:34:54,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:34:54,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:34:54,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,746 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 193 [2024-11-20 09:34:54,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:34:54,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:34:54,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:34:54,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:34:54,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,765 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,779 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-20 09:34:54,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,794 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:34:54,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:34:54,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:34:54,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:34:54,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (1/1) ... [2024-11-20 09:34:54,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:34:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:34:54,849 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 09:34:54,869 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 09:34:54,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:34:54,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:34:54,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:34:54,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:34:54,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:34:54,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:34:54,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:34:54,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:34:54,943 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 09:34:55,039 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:34:55,041 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:34:55,337 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:34:55,337 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:34:55,546 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:34:55,546 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 09:34:55,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:34:55 BoogieIcfgContainer [2024-11-20 09:34:55,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:34:55,549 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:34:55,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:34:55,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:34:55,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:34:54" (1/3) ... [2024-11-20 09:34:55,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1896db65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:34:55, skipping insertion in model container [2024-11-20 09:34:55,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:54" (2/3) ... [2024-11-20 09:34:55,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1896db65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:34:55, skipping insertion in model container [2024-11-20 09:34:55,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:34:55" (3/3) ... [2024-11-20 09:34:55,557 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-11-20 09:34:55,573 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:34:55,574 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:34:55,574 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:34:55,618 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:34:55,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-11-20 09:34:55,676 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-20 09:34:55,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:34:55,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-20 09:34:55,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-11-20 09:34:55,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-11-20 09:34:55,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:34:55,703 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;@4b0ed00d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:34:55,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:34:55,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:34:55,722 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-11-20 09:34:55,722 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:34:55,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:55,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:55,726 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 09:34:55,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 245197459, now seen corresponding path program 1 times [2024-11-20 09:34:55,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:55,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999539986] [2024-11-20 09:34:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:55,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:56,438 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 09:34:56,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999539986] [2024-11-20 09:34:56,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999539986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:34:56,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:34:56,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:34:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547268823] [2024-11-20 09:34:56,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:56,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:34:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:34:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:34:56,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:56,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 09:34:56,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:56,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:56,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:34:56,823 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2024-11-20 09:34:56,823 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-20 09:34:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 485 events. 288/485 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1769 event pairs, 96 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 536. Up to 178 conditions per place. [2024-11-20 09:34:56,833 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 64 selfloop transitions, 10 changer transitions 1/76 dead transitions. [2024-11-20 09:34:56,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 344 flow [2024-11-20 09:34:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:34:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:34:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-11-20 09:34:56,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-20 09:34:56,848 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 8 states and 100 transitions. [2024-11-20 09:34:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 344 flow [2024-11-20 09:34:56,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:34:56,859 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 123 flow [2024-11-20 09:34:56,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2024-11-20 09:34:56,863 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-11-20 09:34:56,864 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 123 flow [2024-11-20 09:34:56,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 09:34:56,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:56,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:56,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:34:56,865 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 09:34:56,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1983090722, now seen corresponding path program 1 times [2024-11-20 09:34:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:56,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408512049] [2024-11-20 09:34:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:56,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:57,081 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 09:34:57,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:57,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408512049] [2024-11-20 09:34:57,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408512049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:34:57,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681516760] [2024-11-20 09:34:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:57,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:34:57,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:34:57,085 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 09:34:57,086 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 09:34:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:57,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 09:34:57,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:34:57,373 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 09:34:57,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:34:57,504 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 09:34:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681516760] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:34:57,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:34:57,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2024-11-20 09:34:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798966012] [2024-11-20 09:34:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:57,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:34:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:34:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:34:57,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:57,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 09:34:57,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:57,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:57,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:34:57,878 INFO L124 PetriNetUnfolderBase]: 617/1023 cut-off events. [2024-11-20 09:34:57,879 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-11-20 09:34:57,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1023 events. 617/1023 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4490 event pairs, 279 based on Foata normal form. 1/897 useless extension candidates. Maximal degree in co-relation 1517. Up to 479 conditions per place. [2024-11-20 09:34:57,889 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 92 selfloop transitions, 12 changer transitions 1/106 dead transitions. [2024-11-20 09:34:57,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 106 transitions, 540 flow [2024-11-20 09:34:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:34:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:34:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-11-20 09:34:57,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-11-20 09:34:57,893 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 123 flow. Second operand 8 states and 119 transitions. [2024-11-20 09:34:57,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 106 transitions, 540 flow [2024-11-20 09:34:57,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 106 transitions, 536 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-20 09:34:57,898 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 210 flow [2024-11-20 09:34:57,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-20 09:34:57,900 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-11-20 09:34:57,902 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 210 flow [2024-11-20 09:34:57,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 09:34:57,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:57,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:57,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 09:34:58,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:34:58,108 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 09:34:58,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1744370288, now seen corresponding path program 1 times [2024-11-20 09:34:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545147440] [2024-11-20 09:34:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:58,219 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 09:34:58,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:58,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545147440] [2024-11-20 09:34:58,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545147440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:34:58,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:34:58,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:34:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953219686] [2024-11-20 09:34:58,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:58,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:34:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:34:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:34:58,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:58,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:34:58,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:58,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:34:58,395 INFO L124 PetriNetUnfolderBase]: 487/833 cut-off events. [2024-11-20 09:34:58,397 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-11-20 09:34:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 833 events. 487/833 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3707 event pairs, 199 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 1625. Up to 539 conditions per place. [2024-11-20 09:34:58,403 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-20 09:34:58,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 447 flow [2024-11-20 09:34:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:34:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:34:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-11-20 09:34:58,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-20 09:34:58,407 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 210 flow. Second operand 6 states and 74 transitions. [2024-11-20 09:34:58,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 447 flow [2024-11-20 09:34:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 420 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-20 09:34:58,414 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 214 flow [2024-11-20 09:34:58,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-20 09:34:58,415 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-11-20 09:34:58,416 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 214 flow [2024-11-20 09:34:58,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:34:58,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:58,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:58,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:34:58,418 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 09:34:58,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 574455480, now seen corresponding path program 1 times [2024-11-20 09:34:58,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:58,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749422421] [2024-11-20 09:34:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:58,524 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 09:34:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:58,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749422421] [2024-11-20 09:34:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749422421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:34:58,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:34:58,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:34:58,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19068616] [2024-11-20 09:34:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:58,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:34:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:34:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:34:58,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:58,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:34:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:34:58,676 INFO L124 PetriNetUnfolderBase]: 416/723 cut-off events. [2024-11-20 09:34:58,676 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2024-11-20 09:34:58,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 723 events. 416/723 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3036 event pairs, 207 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1535. Up to 539 conditions per place. [2024-11-20 09:34:58,682 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-11-20 09:34:58,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 400 flow [2024-11-20 09:34:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:34:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:34:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-11-20 09:34:58,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-11-20 09:34:58,684 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 214 flow. Second operand 6 states and 67 transitions. [2024-11-20 09:34:58,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 400 flow [2024-11-20 09:34:58,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 09:34:58,689 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 220 flow [2024-11-20 09:34:58,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-20 09:34:58,690 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2024-11-20 09:34:58,691 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 220 flow [2024-11-20 09:34:58,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:34:58,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:58,691 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:58,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:34:58,692 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 09:34:58,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash 603243545, now seen corresponding path program 1 times [2024-11-20 09:34:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042785310] [2024-11-20 09:34:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:58,851 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 09:34:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042785310] [2024-11-20 09:34:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042785310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:34:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366292706] [2024-11-20 09:34:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:34:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:34:58,855 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 09:34:58,856 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 09:34:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:58,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 09:34:58,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:34:59,080 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 09:34:59,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:34:59,194 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 09:34:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366292706] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:34:59,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:34:59,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-20 09:34:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261199590] [2024-11-20 09:34:59,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:59,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:34:59,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:34:59,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:34:59,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:59,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 09:34:59,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:34:59,419 INFO L124 PetriNetUnfolderBase]: 391/674 cut-off events. [2024-11-20 09:34:59,420 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-11-20 09:34:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 674 events. 391/674 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2835 event pairs, 192 based on Foata normal form. 1/673 useless extension candidates. Maximal degree in co-relation 1757. Up to 539 conditions per place. [2024-11-20 09:34:59,428 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 5 changer transitions 11/67 dead transitions. [2024-11-20 09:34:59,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 421 flow [2024-11-20 09:34:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:34:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:34:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-11-20 09:34:59,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-20 09:34:59,429 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 220 flow. Second operand 7 states and 77 transitions. [2024-11-20 09:34:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 421 flow [2024-11-20 09:34:59,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-20 09:34:59,434 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2024-11-20 09:34:59,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-11-20 09:34:59,436 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-11-20 09:34:59,436 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2024-11-20 09:34:59,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 09:34:59,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:34:59,437 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:34:59,445 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 09:34:59,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:34:59,642 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 09:34:59,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:34:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -915834458, now seen corresponding path program 2 times [2024-11-20 09:34:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:34:59,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265355157] [2024-11-20 09:34:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:34:59,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:34:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:34:59,802 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 09:34:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:34:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265355157] [2024-11-20 09:34:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265355157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:34:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059860045] [2024-11-20 09:34:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:34:59,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:34:59,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:34:59,808 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 09:34:59,810 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 09:34:59,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 09:34:59,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:34:59,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-20 09:34:59,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:34:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:34:59,994 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:34:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059860045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:34:59,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:34:59,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-20 09:34:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349262729] [2024-11-20 09:34:59,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:34:59,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:34:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:34:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:34:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:34:59,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:34:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 09:34:59,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:34:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:34:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:00,248 INFO L124 PetriNetUnfolderBase]: 388/672 cut-off events. [2024-11-20 09:35:00,249 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-11-20 09:35:00,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 672 events. 388/672 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2805 event pairs, 61 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 1737. Up to 232 conditions per place. [2024-11-20 09:35:00,254 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 67 selfloop transitions, 18 changer transitions 1/87 dead transitions. [2024-11-20 09:35:00,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 523 flow [2024-11-20 09:35:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-11-20 09:35:00,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-11-20 09:35:00,256 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 9 states and 107 transitions. [2024-11-20 09:35:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 523 flow [2024-11-20 09:35:00,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 504 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:00,260 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 288 flow [2024-11-20 09:35:00,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-20 09:35:00,262 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-11-20 09:35:00,262 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 288 flow [2024-11-20 09:35:00,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 09:35:00,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:00,263 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:00,271 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 09:35:00,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:00,467 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 09:35:00,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -133012491, now seen corresponding path program 2 times [2024-11-20 09:35:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805026480] [2024-11-20 09:35:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:00,666 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 09:35:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805026480] [2024-11-20 09:35:00,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805026480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605911951] [2024-11-20 09:35:00,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:00,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:00,670 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 09:35:00,671 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 09:35:00,741 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 09:35:00,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:00,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 09:35:00,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:00,777 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605911951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-11-20 09:35:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780389009] [2024-11-20 09:35:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:00,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:00,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:00,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 09:35:00,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:00,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:00,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:00,947 INFO L124 PetriNetUnfolderBase]: 482/826 cut-off events. [2024-11-20 09:35:00,947 INFO L125 PetriNetUnfolderBase]: For 901/901 co-relation queries the response was YES. [2024-11-20 09:35:00,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 826 events. 482/826 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3584 event pairs, 33 based on Foata normal form. 2/826 useless extension candidates. Maximal degree in co-relation 2104. Up to 313 conditions per place. [2024-11-20 09:35:00,953 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 17 changer transitions 5/73 dead transitions. [2024-11-20 09:35:00,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 519 flow [2024-11-20 09:35:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:35:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:35:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-11-20 09:35:00,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-11-20 09:35:00,955 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 288 flow. Second operand 5 states and 69 transitions. [2024-11-20 09:35:00,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 519 flow [2024-11-20 09:35:00,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:35:00,961 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 317 flow [2024-11-20 09:35:00,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-11-20 09:35:00,964 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2024-11-20 09:35:00,964 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 317 flow [2024-11-20 09:35:00,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 09:35:00,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:00,965 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 09:35:00,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:35:01,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:01,169 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 09:35:01,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2026604512, now seen corresponding path program 1 times [2024-11-20 09:35:01,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:01,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600606342] [2024-11-20 09:35:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:01,326 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 09:35:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600606342] [2024-11-20 09:35:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600606342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136680981] [2024-11-20 09:35:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:01,330 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 09:35:01,332 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 09:35:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:01,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:35:01,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:01,484 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 09:35:01,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:35:01,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136680981] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:01,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:35:01,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-20 09:35:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028481097] [2024-11-20 09:35:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:01,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:35:01,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:01,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 09:35:01,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:01,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:01,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:01,782 INFO L124 PetriNetUnfolderBase]: 488/817 cut-off events. [2024-11-20 09:35:01,783 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-11-20 09:35:01,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 817 events. 488/817 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3379 event pairs, 182 based on Foata normal form. 20/836 useless extension candidates. Maximal degree in co-relation 2449. Up to 264 conditions per place. [2024-11-20 09:35:01,788 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 74 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-11-20 09:35:01,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 663 flow [2024-11-20 09:35:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:35:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:35:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-11-20 09:35:01,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-11-20 09:35:01,790 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 317 flow. Second operand 8 states and 94 transitions. [2024-11-20 09:35:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 663 flow [2024-11-20 09:35:01,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 620 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-11-20 09:35:01,797 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 326 flow [2024-11-20 09:35:01,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-11-20 09:35:01,798 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-11-20 09:35:01,799 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 326 flow [2024-11-20 09:35:01,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 09:35:01,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:01,799 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 09:35:01,807 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 09:35:02,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:02,000 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 09:35:02,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1401016533, now seen corresponding path program 1 times [2024-11-20 09:35:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030833410] [2024-11-20 09:35:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:02,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:02,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030833410] [2024-11-20 09:35:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030833410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:35:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827876719] [2024-11-20 09:35:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:02,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:35:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:35:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:35:02,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:02,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:02,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:02,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:02,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:02,208 INFO L124 PetriNetUnfolderBase]: 370/636 cut-off events. [2024-11-20 09:35:02,208 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-11-20 09:35:02,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 636 events. 370/636 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2525 event pairs, 188 based on Foata normal form. 25/616 useless extension candidates. Maximal degree in co-relation 1872. Up to 396 conditions per place. [2024-11-20 09:35:02,212 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-11-20 09:35:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 446 flow [2024-11-20 09:35:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:35:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:35:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-20 09:35:02,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-20 09:35:02,213 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 326 flow. Second operand 5 states and 66 transitions. [2024-11-20 09:35:02,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 446 flow [2024-11-20 09:35:02,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 422 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 09:35:02,216 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 263 flow [2024-11-20 09:35:02,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-11-20 09:35:02,217 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-11-20 09:35:02,217 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 263 flow [2024-11-20 09:35:02,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:02,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:02,218 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 09:35:02,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:35:02,218 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 09:35:02,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:02,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1357813479, now seen corresponding path program 1 times [2024-11-20 09:35:02,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:02,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047802164] [2024-11-20 09:35:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:02,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047802164] [2024-11-20 09:35:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047802164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:35:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095092905] [2024-11-20 09:35:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:02,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:35:02,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:35:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:35:02,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:02,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:02,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:02,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:02,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:02,401 INFO L124 PetriNetUnfolderBase]: 302/525 cut-off events. [2024-11-20 09:35:02,401 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-11-20 09:35:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 525 events. 302/525 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1960 event pairs, 170 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 1504. Up to 396 conditions per place. [2024-11-20 09:35:02,404 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 30 selfloop transitions, 2 changer transitions 20/53 dead transitions. [2024-11-20 09:35:02,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 368 flow [2024-11-20 09:35:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:35:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:35:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-20 09:35:02,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-20 09:35:02,405 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 263 flow. Second operand 5 states and 60 transitions. [2024-11-20 09:35:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 368 flow [2024-11-20 09:35:02,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:02,407 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 168 flow [2024-11-20 09:35:02,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-11-20 09:35:02,408 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-11-20 09:35:02,408 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 168 flow [2024-11-20 09:35:02,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:02,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:02,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:02,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 09:35:02,409 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 09:35:02,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -333811787, now seen corresponding path program 1 times [2024-11-20 09:35:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:02,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284490398] [2024-11-20 09:35:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:02,541 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 09:35:02,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284490398] [2024-11-20 09:35:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284490398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941701851] [2024-11-20 09:35:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:02,543 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 09:35:02,544 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 09:35:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:02,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:35:02,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:02,696 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 09:35:02,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:35:02,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941701851] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:02,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:35:02,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-20 09:35:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811113130] [2024-11-20 09:35:02,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:02,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:35:02,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:02,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 09:35:02,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:02,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:02,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:02,901 INFO L124 PetriNetUnfolderBase]: 328/561 cut-off events. [2024-11-20 09:35:02,902 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2024-11-20 09:35:02,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 561 events. 328/561 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2111 event pairs, 159 based on Foata normal form. 28/588 useless extension candidates. Maximal degree in co-relation 1614. Up to 278 conditions per place. [2024-11-20 09:35:02,905 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-11-20 09:35:02,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 333 flow [2024-11-20 09:35:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2024-11-20 09:35:02,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-11-20 09:35:02,907 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 168 flow. Second operand 7 states and 62 transitions. [2024-11-20 09:35:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 333 flow [2024-11-20 09:35:02,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 312 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:02,909 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 186 flow [2024-11-20 09:35:02,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-11-20 09:35:02,910 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-11-20 09:35:02,910 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 186 flow [2024-11-20 09:35:02,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 09:35:02,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:02,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:02,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:03,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:03,111 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 09:35:03,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1721947342, now seen corresponding path program 1 times [2024-11-20 09:35:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:03,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667505737] [2024-11-20 09:35:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:03,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:03,705 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 09:35:03,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667505737] [2024-11-20 09:35:03,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667505737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:03,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879446848] [2024-11-20 09:35:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:03,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:03,708 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 09:35:03,710 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 09:35:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:03,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:03,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:03,915 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-20 09:35:03,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-11-20 09:35:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:03,947 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879446848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:03,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 09:35:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123368357] [2024-11-20 09:35:03,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:03,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:35:03,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:03,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:03,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:03,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:03,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:04,255 INFO L124 PetriNetUnfolderBase]: 461/793 cut-off events. [2024-11-20 09:35:04,256 INFO L125 PetriNetUnfolderBase]: For 1154/1154 co-relation queries the response was YES. [2024-11-20 09:35:04,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 793 events. 461/793 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3428 event pairs, 195 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 2458. Up to 497 conditions per place. [2024-11-20 09:35:04,261 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 68 selfloop transitions, 9 changer transitions 6/84 dead transitions. [2024-11-20 09:35:04,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 567 flow [2024-11-20 09:35:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-11-20 09:35:04,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-20 09:35:04,263 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 186 flow. Second operand 7 states and 91 transitions. [2024-11-20 09:35:04,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 567 flow [2024-11-20 09:35:04,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 554 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:04,266 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 252 flow [2024-11-20 09:35:04,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-11-20 09:35:04,268 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2024-11-20 09:35:04,268 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 252 flow [2024-11-20 09:35:04,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:04,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:04,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:04,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 09:35:04,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:04,473 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 09:35:04,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -686636724, now seen corresponding path program 2 times [2024-11-20 09:35:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481517643] [2024-11-20 09:35:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:05,002 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 09:35:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481517643] [2024-11-20 09:35:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481517643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563047112] [2024-11-20 09:35:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:05,005 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 09:35:05,007 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 09:35:05,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 09:35:05,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:05,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:05,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:05,202 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-20 09:35:05,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-11-20 09:35:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:05,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:05,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563047112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:05,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:05,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-11-20 09:35:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968274837] [2024-11-20 09:35:05,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:05,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:05,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:35:05,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:05,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:05,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:05,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:05,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:05,477 INFO L124 PetriNetUnfolderBase]: 500/867 cut-off events. [2024-11-20 09:35:05,478 INFO L125 PetriNetUnfolderBase]: For 2057/2057 co-relation queries the response was YES. [2024-11-20 09:35:05,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3034 conditions, 867 events. 500/867 cut-off events. For 2057/2057 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3857 event pairs, 222 based on Foata normal form. 1/867 useless extension candidates. Maximal degree in co-relation 3001. Up to 503 conditions per place. [2024-11-20 09:35:05,483 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 63 selfloop transitions, 13 changer transitions 6/83 dead transitions. [2024-11-20 09:35:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 632 flow [2024-11-20 09:35:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-11-20 09:35:05,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-20 09:35:05,484 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 252 flow. Second operand 7 states and 91 transitions. [2024-11-20 09:35:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 632 flow [2024-11-20 09:35:05,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 597 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-20 09:35:05,488 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 342 flow [2024-11-20 09:35:05,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-11-20 09:35:05,489 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-11-20 09:35:05,489 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 342 flow [2024-11-20 09:35:05,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:05,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:05,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:05,499 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 09:35:05,690 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,SelfDestructingSolverStorable12 [2024-11-20 09:35:05,691 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 09:35:05,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash 810573182, now seen corresponding path program 3 times [2024-11-20 09:35:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780526425] [2024-11-20 09:35:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:06,187 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 09:35:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780526425] [2024-11-20 09:35:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780526425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688254030] [2024-11-20 09:35:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:06,190 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 09:35:06,191 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 09:35:06,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-20 09:35:06,263 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:06,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:06,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:06,379 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-20 09:35:06,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-11-20 09:35:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:06,403 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:06,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688254030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:06,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:06,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 09:35:06,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112883445] [2024-11-20 09:35:06,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:06,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:35:06,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:06,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:06,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:06,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:06,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:06,687 INFO L124 PetriNetUnfolderBase]: 527/912 cut-off events. [2024-11-20 09:35:06,687 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-11-20 09:35:06,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 912 events. 527/912 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4116 event pairs, 232 based on Foata normal form. 1/912 useless extension candidates. Maximal degree in co-relation 3418. Up to 511 conditions per place. [2024-11-20 09:35:06,693 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 70 selfloop transitions, 17 changer transitions 6/94 dead transitions. [2024-11-20 09:35:06,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 818 flow [2024-11-20 09:35:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-11-20 09:35:06,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-11-20 09:35:06,695 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 342 flow. Second operand 7 states and 89 transitions. [2024-11-20 09:35:06,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 818 flow [2024-11-20 09:35:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 792 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-20 09:35:06,700 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 466 flow [2024-11-20 09:35:06,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-11-20 09:35:06,701 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-11-20 09:35:06,701 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 466 flow [2024-11-20 09:35:06,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:06,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:06,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:06,710 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 09:35:06,905 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,SelfDestructingSolverStorable13 [2024-11-20 09:35:06,906 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 09:35:06,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:06,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2087679896, now seen corresponding path program 4 times [2024-11-20 09:35:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704307314] [2024-11-20 09:35:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:07,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704307314] [2024-11-20 09:35:07,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704307314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:07,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:07,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:07,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523263513] [2024-11-20 09:35:07,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:07,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:07,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:07,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 466 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:07,640 INFO L124 PetriNetUnfolderBase]: 517/889 cut-off events. [2024-11-20 09:35:07,641 INFO L125 PetriNetUnfolderBase]: For 3234/3234 co-relation queries the response was YES. [2024-11-20 09:35:07,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 889 events. 517/889 cut-off events. For 3234/3234 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3943 event pairs, 225 based on Foata normal form. 1/889 useless extension candidates. Maximal degree in co-relation 3527. Up to 504 conditions per place. [2024-11-20 09:35:07,648 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 59 selfloop transitions, 23 changer transitions 6/89 dead transitions. [2024-11-20 09:35:07,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 834 flow [2024-11-20 09:35:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-20 09:35:07,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-20 09:35:07,650 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 466 flow. Second operand 9 states and 96 transitions. [2024-11-20 09:35:07,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 834 flow [2024-11-20 09:35:07,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 784 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:07,656 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 546 flow [2024-11-20 09:35:07,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=546, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2024-11-20 09:35:07,657 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-11-20 09:35:07,657 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 546 flow [2024-11-20 09:35:07,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:07,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:07,657 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:07,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 09:35:07,658 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 09:35:07,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash 200190496, now seen corresponding path program 5 times [2024-11-20 09:35:07,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:07,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762108951] [2024-11-20 09:35:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:07,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:08,125 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 09:35:08,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762108951] [2024-11-20 09:35:08,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762108951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438927280] [2024-11-20 09:35:08,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:08,130 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 09:35:08,131 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 09:35:08,206 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:08,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:08,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 09:35:08,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:08,305 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 09:35:08,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-11-20 09:35:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:08,332 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438927280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 12 [2024-11-20 09:35:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867823612] [2024-11-20 09:35:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:08,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:35:08,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:08,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 546 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:08,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:08,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:08,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:08,655 INFO L124 PetriNetUnfolderBase]: 683/1178 cut-off events. [2024-11-20 09:35:08,655 INFO L125 PetriNetUnfolderBase]: For 4237/4237 co-relation queries the response was YES. [2024-11-20 09:35:08,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 1178 events. 683/1178 cut-off events. For 4237/4237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5552 event pairs, 272 based on Foata normal form. 1/1179 useless extension candidates. Maximal degree in co-relation 4708. Up to 682 conditions per place. [2024-11-20 09:35:08,664 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 25 changer transitions 6/115 dead transitions. [2024-11-20 09:35:08,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 1168 flow [2024-11-20 09:35:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-20 09:35:08,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-20 09:35:08,666 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 546 flow. Second operand 9 states and 96 transitions. [2024-11-20 09:35:08,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 1168 flow [2024-11-20 09:35:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 1107 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:08,674 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 672 flow [2024-11-20 09:35:08,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-11-20 09:35:08,675 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-11-20 09:35:08,675 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 672 flow [2024-11-20 09:35:08,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:08,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:08,675 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:08,686 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 09:35:08,879 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 09:35:08,880 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 09:35:08,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1659732378, now seen corresponding path program 6 times [2024-11-20 09:35:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334291577] [2024-11-20 09:35:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:09,271 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 09:35:09,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334291577] [2024-11-20 09:35:09,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334291577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660956716] [2024-11-20 09:35:09,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:35:09,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:09,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:09,275 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 09:35:09,276 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 09:35:09,352 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-20 09:35:09,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:09,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:09,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:09,437 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-20 09:35:09,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-11-20 09:35:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:09,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660956716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:09,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 09:35:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146718747] [2024-11-20 09:35:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:09,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:35:09,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:09,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:09,748 INFO L124 PetriNetUnfolderBase]: 679/1172 cut-off events. [2024-11-20 09:35:09,748 INFO L125 PetriNetUnfolderBase]: For 5075/5075 co-relation queries the response was YES. [2024-11-20 09:35:09,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5083 conditions, 1172 events. 679/1172 cut-off events. For 5075/5075 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5488 event pairs, 281 based on Foata normal form. 2/1174 useless extension candidates. Maximal degree in co-relation 5037. Up to 689 conditions per place. [2024-11-20 09:35:09,759 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 75 selfloop transitions, 27 changer transitions 7/110 dead transitions. [2024-11-20 09:35:09,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 1177 flow [2024-11-20 09:35:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-11-20 09:35:09,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-11-20 09:35:09,761 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 672 flow. Second operand 7 states and 87 transitions. [2024-11-20 09:35:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 1177 flow [2024-11-20 09:35:09,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 1114 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:09,773 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 849 flow [2024-11-20 09:35:09,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=849, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-11-20 09:35:09,774 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-11-20 09:35:09,774 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 849 flow [2024-11-20 09:35:09,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:09,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:09,774 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:09,782 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 09:35:09,978 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 09:35:09,979 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 09:35:09,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2015334144, now seen corresponding path program 7 times [2024-11-20 09:35:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894113704] [2024-11-20 09:35:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:10,387 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 09:35:10,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894113704] [2024-11-20 09:35:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894113704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932498919] [2024-11-20 09:35:10,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:35:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:10,390 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 09:35:10,391 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 09:35:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:10,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:10,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:10,571 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-20 09:35:10,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-11-20 09:35:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:10,598 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932498919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:10,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-11-20 09:35:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810527222] [2024-11-20 09:35:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:10,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:10,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:35:10,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:10,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:10,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:10,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:10,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:10,928 INFO L124 PetriNetUnfolderBase]: 676/1166 cut-off events. [2024-11-20 09:35:10,929 INFO L125 PetriNetUnfolderBase]: For 6097/6097 co-relation queries the response was YES. [2024-11-20 09:35:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5200 conditions, 1166 events. 676/1166 cut-off events. For 6097/6097 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5438 event pairs, 291 based on Foata normal form. 1/1166 useless extension candidates. Maximal degree in co-relation 5151. Up to 689 conditions per place. [2024-11-20 09:35:10,943 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 76 selfloop transitions, 28 changer transitions 6/111 dead transitions. [2024-11-20 09:35:10,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1269 flow [2024-11-20 09:35:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-11-20 09:35:10,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-11-20 09:35:10,944 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 849 flow. Second operand 7 states and 90 transitions. [2024-11-20 09:35:10,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1269 flow [2024-11-20 09:35:10,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 1213 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-11-20 09:35:10,959 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 938 flow [2024-11-20 09:35:10,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-11-20 09:35:10,960 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2024-11-20 09:35:10,960 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 938 flow [2024-11-20 09:35:10,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 09:35:10,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:10,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:10,969 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 09:35:11,161 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 09:35:11,162 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 09:35:11,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1802163952, now seen corresponding path program 8 times [2024-11-20 09:35:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049160661] [2024-11-20 09:35:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:11,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:11,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049160661] [2024-11-20 09:35:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049160661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:11,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014638178] [2024-11-20 09:35:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:11,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:11,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:11,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:11,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:11,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 938 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:11,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:11,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:11,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:11,846 INFO L124 PetriNetUnfolderBase]: 667/1144 cut-off events. [2024-11-20 09:35:11,846 INFO L125 PetriNetUnfolderBase]: For 6286/6286 co-relation queries the response was YES. [2024-11-20 09:35:11,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 1144 events. 667/1144 cut-off events. For 6286/6286 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5243 event pairs, 290 based on Foata normal form. 1/1144 useless extension candidates. Maximal degree in co-relation 5165. Up to 682 conditions per place. [2024-11-20 09:35:11,857 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 75 selfloop transitions, 29 changer transitions 6/111 dead transitions. [2024-11-20 09:35:11,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 111 transitions, 1309 flow [2024-11-20 09:35:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:35:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:35:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2024-11-20 09:35:11,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-11-20 09:35:11,859 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 938 flow. Second operand 10 states and 90 transitions. [2024-11-20 09:35:11,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 111 transitions, 1309 flow [2024-11-20 09:35:11,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 1256 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-20 09:35:11,871 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 968 flow [2024-11-20 09:35:11,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=968, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2024-11-20 09:35:11,871 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 75 predicate places. [2024-11-20 09:35:11,871 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 968 flow [2024-11-20 09:35:11,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:11,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:11,872 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:11,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 09:35:11,872 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 09:35:11,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2087307079, now seen corresponding path program 1 times [2024-11-20 09:35:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202051696] [2024-11-20 09:35:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202051696] [2024-11-20 09:35:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202051696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:12,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:12,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54241750] [2024-11-20 09:35:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:12,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:12,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:12,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 968 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:12,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:12,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:12,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:12,450 INFO L124 PetriNetUnfolderBase]: 718/1240 cut-off events. [2024-11-20 09:35:12,451 INFO L125 PetriNetUnfolderBase]: For 6578/6578 co-relation queries the response was YES. [2024-11-20 09:35:12,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5652 conditions, 1240 events. 718/1240 cut-off events. For 6578/6578 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5949 event pairs, 287 based on Foata normal form. 12/1252 useless extension candidates. Maximal degree in co-relation 5596. Up to 684 conditions per place. [2024-11-20 09:35:12,459 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 88 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-11-20 09:35:12,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 1448 flow [2024-11-20 09:35:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-11-20 09:35:12,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-11-20 09:35:12,461 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 968 flow. Second operand 9 states and 104 transitions. [2024-11-20 09:35:12,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 1448 flow [2024-11-20 09:35:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 1387 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:12,498 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 1035 flow [2024-11-20 09:35:12,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1035, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2024-11-20 09:35:12,500 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 77 predicate places. [2024-11-20 09:35:12,500 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 1035 flow [2024-11-20 09:35:12,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:12,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:12,501 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:12,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 09:35:12,501 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 09:35:12,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:12,502 INFO L85 PathProgramCache]: Analyzing trace with hash -226551663, now seen corresponding path program 2 times [2024-11-20 09:35:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:12,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929175053] [2024-11-20 09:35:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:12,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929175053] [2024-11-20 09:35:12,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929175053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:12,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:12,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:12,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940703555] [2024-11-20 09:35:12,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:12,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:12,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:12,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:12,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 1035 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:12,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:12,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:12,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:13,005 INFO L124 PetriNetUnfolderBase]: 713/1235 cut-off events. [2024-11-20 09:35:13,005 INFO L125 PetriNetUnfolderBase]: For 6741/6741 co-relation queries the response was YES. [2024-11-20 09:35:13,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 1235 events. 713/1235 cut-off events. For 6741/6741 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6049 event pairs, 266 based on Foata normal form. 5/1240 useless extension candidates. Maximal degree in co-relation 5655. Up to 684 conditions per place. [2024-11-20 09:35:13,014 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 83 selfloop transitions, 33 changer transitions 10/127 dead transitions. [2024-11-20 09:35:13,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 127 transitions, 1497 flow [2024-11-20 09:35:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-11-20 09:35:13,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-11-20 09:35:13,015 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 1035 flow. Second operand 9 states and 93 transitions. [2024-11-20 09:35:13,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 127 transitions, 1497 flow [2024-11-20 09:35:13,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 127 transitions, 1411 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-20 09:35:13,032 INFO L231 Difference]: Finished difference. Result has 106 places, 82 transitions, 982 flow [2024-11-20 09:35:13,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=982, PETRI_PLACES=106, PETRI_TRANSITIONS=82} [2024-11-20 09:35:13,033 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2024-11-20 09:35:13,033 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 82 transitions, 982 flow [2024-11-20 09:35:13,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:13,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:13,033 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:13,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 09:35:13,034 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 09:35:13,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1851301303, now seen corresponding path program 3 times [2024-11-20 09:35:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293320107] [2024-11-20 09:35:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:13,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293320107] [2024-11-20 09:35:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293320107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259201749] [2024-11-20 09:35:13,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:13,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:13,302 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 09:35:13,305 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 09:35:13,383 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:35:13,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:13,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:35:13,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:13,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:13,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-20 09:35:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:13,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:13,582 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:13,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:13,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259201749] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:13,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:35:13,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2024-11-20 09:35:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41899924] [2024-11-20 09:35:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:13,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:35:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:35:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:35:13,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:13,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 82 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 09:35:13,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:13,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:13,901 INFO L124 PetriNetUnfolderBase]: 751/1311 cut-off events. [2024-11-20 09:35:13,902 INFO L125 PetriNetUnfolderBase]: For 6861/6861 co-relation queries the response was YES. [2024-11-20 09:35:13,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5960 conditions, 1311 events. 751/1311 cut-off events. For 6861/6861 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6529 event pairs, 291 based on Foata normal form. 12/1323 useless extension candidates. Maximal degree in co-relation 5904. Up to 703 conditions per place. [2024-11-20 09:35:13,911 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 97 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-11-20 09:35:13,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 1511 flow [2024-11-20 09:35:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-11-20 09:35:13,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-11-20 09:35:13,912 INFO L175 Difference]: Start difference. First operand has 106 places, 82 transitions, 982 flow. Second operand 7 states and 96 transitions. [2024-11-20 09:35:13,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 1511 flow [2024-11-20 09:35:13,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1425 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:13,926 INFO L231 Difference]: Finished difference. Result has 105 places, 85 transitions, 1032 flow [2024-11-20 09:35:13,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1032, PETRI_PLACES=105, PETRI_TRANSITIONS=85} [2024-11-20 09:35:13,926 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 79 predicate places. [2024-11-20 09:35:13,926 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 85 transitions, 1032 flow [2024-11-20 09:35:13,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 09:35:13,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:13,927 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:13,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 09:35:14,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-20 09:35:14,131 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:14,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1323625025, now seen corresponding path program 1 times [2024-11-20 09:35:14,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270230286] [2024-11-20 09:35:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:14,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270230286] [2024-11-20 09:35:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270230286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523420594] [2024-11-20 09:35:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:14,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:14,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:14,396 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 09:35:14,400 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 09:35:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:14,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 09:35:14,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:14,549 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:35:14,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 09:35:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:14,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:14,634 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:14,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:14,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523420594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:14,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:14,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-11-20 09:35:14,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341354212] [2024-11-20 09:35:14,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:14,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:35:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:35:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:35:14,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:14,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 85 transitions, 1032 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:14,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:14,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:14,951 INFO L124 PetriNetUnfolderBase]: 791/1379 cut-off events. [2024-11-20 09:35:14,951 INFO L125 PetriNetUnfolderBase]: For 6638/6638 co-relation queries the response was YES. [2024-11-20 09:35:14,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1379 events. 791/1379 cut-off events. For 6638/6638 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7009 event pairs, 154 based on Foata normal form. 14/1392 useless extension candidates. Maximal degree in co-relation 6215. Up to 659 conditions per place. [2024-11-20 09:35:14,958 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 101 selfloop transitions, 38 changer transitions 0/140 dead transitions. [2024-11-20 09:35:14,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1625 flow [2024-11-20 09:35:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:35:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:35:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-11-20 09:35:14,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-11-20 09:35:14,959 INFO L175 Difference]: Start difference. First operand has 105 places, 85 transitions, 1032 flow. Second operand 10 states and 106 transitions. [2024-11-20 09:35:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1625 flow [2024-11-20 09:35:14,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1586 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-20 09:35:14,970 INFO L231 Difference]: Finished difference. Result has 114 places, 87 transitions, 1099 flow [2024-11-20 09:35:14,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1099, PETRI_PLACES=114, PETRI_TRANSITIONS=87} [2024-11-20 09:35:14,970 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 88 predicate places. [2024-11-20 09:35:14,971 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 87 transitions, 1099 flow [2024-11-20 09:35:14,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:14,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:14,971 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:14,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:15,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:15,176 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:15,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2049108817, now seen corresponding path program 4 times [2024-11-20 09:35:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:15,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365700042] [2024-11-20 09:35:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365700042] [2024-11-20 09:35:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365700042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:15,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601874474] [2024-11-20 09:35:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:15,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:15,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:15,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 87 transitions, 1099 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:15,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:15,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:15,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:15,729 INFO L124 PetriNetUnfolderBase]: 791/1384 cut-off events. [2024-11-20 09:35:15,729 INFO L125 PetriNetUnfolderBase]: For 7467/7467 co-relation queries the response was YES. [2024-11-20 09:35:15,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6492 conditions, 1384 events. 791/1384 cut-off events. For 7467/7467 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7020 event pairs, 336 based on Foata normal form. 5/1389 useless extension candidates. Maximal degree in co-relation 6432. Up to 764 conditions per place. [2024-11-20 09:35:15,737 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 79 selfloop transitions, 38 changer transitions 4/122 dead transitions. [2024-11-20 09:35:15,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 122 transitions, 1536 flow [2024-11-20 09:35:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-11-20 09:35:15,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-20 09:35:15,740 INFO L175 Difference]: Start difference. First operand has 114 places, 87 transitions, 1099 flow. Second operand 9 states and 90 transitions. [2024-11-20 09:35:15,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 122 transitions, 1536 flow [2024-11-20 09:35:15,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 122 transitions, 1445 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:15,756 INFO L231 Difference]: Finished difference. Result has 117 places, 88 transitions, 1109 flow [2024-11-20 09:35:15,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1109, PETRI_PLACES=117, PETRI_TRANSITIONS=88} [2024-11-20 09:35:15,757 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 91 predicate places. [2024-11-20 09:35:15,757 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 88 transitions, 1109 flow [2024-11-20 09:35:15,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:15,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:15,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:15,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-20 09:35:15,757 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:15,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 218597905, now seen corresponding path program 5 times [2024-11-20 09:35:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:15,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713882144] [2024-11-20 09:35:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:16,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713882144] [2024-11-20 09:35:16,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713882144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:16,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:16,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:16,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176215926] [2024-11-20 09:35:16,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:16,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:16,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:16,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 88 transitions, 1109 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:16,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:16,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:16,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:16,328 INFO L124 PetriNetUnfolderBase]: 754/1306 cut-off events. [2024-11-20 09:35:16,328 INFO L125 PetriNetUnfolderBase]: For 6520/6520 co-relation queries the response was YES. [2024-11-20 09:35:16,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 1306 events. 754/1306 cut-off events. For 6520/6520 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6421 event pairs, 329 based on Foata normal form. 5/1311 useless extension candidates. Maximal degree in co-relation 6132. Up to 764 conditions per place. [2024-11-20 09:35:16,334 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 78 selfloop transitions, 35 changer transitions 8/122 dead transitions. [2024-11-20 09:35:16,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 122 transitions, 1499 flow [2024-11-20 09:35:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-11-20 09:35:16,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-11-20 09:35:16,336 INFO L175 Difference]: Start difference. First operand has 117 places, 88 transitions, 1109 flow. Second operand 9 states and 91 transitions. [2024-11-20 09:35:16,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 122 transitions, 1499 flow [2024-11-20 09:35:16,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 1416 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:16,351 INFO L231 Difference]: Finished difference. Result has 117 places, 85 transitions, 1046 flow [2024-11-20 09:35:16,351 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1046, PETRI_PLACES=117, PETRI_TRANSITIONS=85} [2024-11-20 09:35:16,353 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 91 predicate places. [2024-11-20 09:35:16,353 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 85 transitions, 1046 flow [2024-11-20 09:35:16,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:16,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:16,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:16,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-20 09:35:16,354 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:16,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1511752797, now seen corresponding path program 2 times [2024-11-20 09:35:16,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346014179] [2024-11-20 09:35:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346014179] [2024-11-20 09:35:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346014179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802228160] [2024-11-20 09:35:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:16,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:16,623 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 09:35:16,624 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 09:35:16,702 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:16,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:16,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:35:16,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:16,801 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 09:35:16,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 09:35:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:16,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:16,896 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:16,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:16,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802228160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:16,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:16,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-20 09:35:16,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302899809] [2024-11-20 09:35:16,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:16,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:35:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:35:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:35:16,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:16,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 85 transitions, 1046 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:16,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:16,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:17,383 INFO L124 PetriNetUnfolderBase]: 1117/1932 cut-off events. [2024-11-20 09:35:17,383 INFO L125 PetriNetUnfolderBase]: For 8393/8393 co-relation queries the response was YES. [2024-11-20 09:35:17,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8484 conditions, 1932 events. 1117/1932 cut-off events. For 8393/8393 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10388 event pairs, 362 based on Foata normal form. 14/1946 useless extension candidates. Maximal degree in co-relation 8440. Up to 730 conditions per place. [2024-11-20 09:35:17,397 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 119 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2024-11-20 09:35:17,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 164 transitions, 1833 flow [2024-11-20 09:35:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-11-20 09:35:17,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-20 09:35:17,400 INFO L175 Difference]: Start difference. First operand has 117 places, 85 transitions, 1046 flow. Second operand 12 states and 138 transitions. [2024-11-20 09:35:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 164 transitions, 1833 flow [2024-11-20 09:35:17,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 164 transitions, 1745 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-20 09:35:17,424 INFO L231 Difference]: Finished difference. Result has 120 places, 93 transitions, 1178 flow [2024-11-20 09:35:17,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1178, PETRI_PLACES=120, PETRI_TRANSITIONS=93} [2024-11-20 09:35:17,425 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 94 predicate places. [2024-11-20 09:35:17,425 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 93 transitions, 1178 flow [2024-11-20 09:35:17,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:17,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:17,425 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:17,433 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 09:35:17,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 09:35:17,626 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:17,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1292645215, now seen corresponding path program 3 times [2024-11-20 09:35:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:17,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319760541] [2024-11-20 09:35:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:17,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319760541] [2024-11-20 09:35:17,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319760541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319802686] [2024-11-20 09:35:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:17,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:17,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:17,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 93 transitions, 1178 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:17,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:17,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:17,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:18,233 INFO L124 PetriNetUnfolderBase]: 1113/1928 cut-off events. [2024-11-20 09:35:18,233 INFO L125 PetriNetUnfolderBase]: For 10454/10454 co-relation queries the response was YES. [2024-11-20 09:35:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8959 conditions, 1928 events. 1113/1928 cut-off events. For 10454/10454 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10298 event pairs, 581 based on Foata normal form. 4/1932 useless extension candidates. Maximal degree in co-relation 8913. Up to 1396 conditions per place. [2024-11-20 09:35:18,243 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 84 selfloop transitions, 35 changer transitions 3/123 dead transitions. [2024-11-20 09:35:18,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 123 transitions, 1565 flow [2024-11-20 09:35:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-11-20 09:35:18,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-11-20 09:35:18,245 INFO L175 Difference]: Start difference. First operand has 120 places, 93 transitions, 1178 flow. Second operand 9 states and 86 transitions. [2024-11-20 09:35:18,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 123 transitions, 1565 flow [2024-11-20 09:35:18,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 1489 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-20 09:35:18,267 INFO L231 Difference]: Finished difference. Result has 120 places, 91 transitions, 1139 flow [2024-11-20 09:35:18,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1139, PETRI_PLACES=120, PETRI_TRANSITIONS=91} [2024-11-20 09:35:18,268 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 94 predicate places. [2024-11-20 09:35:18,268 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 91 transitions, 1139 flow [2024-11-20 09:35:18,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:18,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:18,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:18,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-20 09:35:18,268 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:18,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2058021563, now seen corresponding path program 4 times [2024-11-20 09:35:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142748126] [2024-11-20 09:35:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142748126] [2024-11-20 09:35:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142748126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680104278] [2024-11-20 09:35:18,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:35:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:18,541 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 09:35:18,542 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 09:35:18,620 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:35:18,620 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:18,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:35:18,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:18,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:18,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-20 09:35:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:18,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:18,819 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:18,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:18,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680104278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:18,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:18,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-11-20 09:35:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51796608] [2024-11-20 09:35:18,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:18,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:35:18,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:35:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:35:18,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:18,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 91 transitions, 1139 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 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 09:35:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:19,396 INFO L124 PetriNetUnfolderBase]: 1161/2007 cut-off events. [2024-11-20 09:35:19,396 INFO L125 PetriNetUnfolderBase]: For 10211/10211 co-relation queries the response was YES. [2024-11-20 09:35:19,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9039 conditions, 2007 events. 1161/2007 cut-off events. For 10211/10211 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10807 event pairs, 455 based on Foata normal form. 21/2028 useless extension candidates. Maximal degree in co-relation 8994. Up to 1016 conditions per place. [2024-11-20 09:35:19,405 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 116 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-11-20 09:35:19,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 166 transitions, 1891 flow [2024-11-20 09:35:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:35:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:35:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-11-20 09:35:19,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3596938775510204 [2024-11-20 09:35:19,407 INFO L175 Difference]: Start difference. First operand has 120 places, 91 transitions, 1139 flow. Second operand 14 states and 141 transitions. [2024-11-20 09:35:19,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 166 transitions, 1891 flow [2024-11-20 09:35:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 166 transitions, 1813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:19,424 INFO L231 Difference]: Finished difference. Result has 130 places, 101 transitions, 1302 flow [2024-11-20 09:35:19,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1302, PETRI_PLACES=130, PETRI_TRANSITIONS=101} [2024-11-20 09:35:19,424 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 104 predicate places. [2024-11-20 09:35:19,424 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 101 transitions, 1302 flow [2024-11-20 09:35:19,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 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 09:35:19,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:19,425 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:19,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:19,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 09:35:19,628 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:19,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1115061845, now seen corresponding path program 6 times [2024-11-20 09:35:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583914343] [2024-11-20 09:35:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:19,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583914343] [2024-11-20 09:35:19,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583914343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:19,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:19,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111045149] [2024-11-20 09:35:19,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:19,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:19,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:19,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 101 transitions, 1302 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:19,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:19,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:19,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:20,238 INFO L124 PetriNetUnfolderBase]: 1186/2046 cut-off events. [2024-11-20 09:35:20,239 INFO L125 PetriNetUnfolderBase]: For 13300/13300 co-relation queries the response was YES. [2024-11-20 09:35:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9639 conditions, 2046 events. 1186/2046 cut-off events. For 13300/13300 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10967 event pairs, 646 based on Foata normal form. 12/2058 useless extension candidates. Maximal degree in co-relation 9589. Up to 1495 conditions per place. [2024-11-20 09:35:20,250 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 96 selfloop transitions, 38 changer transitions 0/135 dead transitions. [2024-11-20 09:35:20,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 135 transitions, 1787 flow [2024-11-20 09:35:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-20 09:35:20,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-20 09:35:20,251 INFO L175 Difference]: Start difference. First operand has 130 places, 101 transitions, 1302 flow. Second operand 9 states and 96 transitions. [2024-11-20 09:35:20,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 135 transitions, 1787 flow [2024-11-20 09:35:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 135 transitions, 1719 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:20,269 INFO L231 Difference]: Finished difference. Result has 134 places, 107 transitions, 1439 flow [2024-11-20 09:35:20,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1439, PETRI_PLACES=134, PETRI_TRANSITIONS=107} [2024-11-20 09:35:20,270 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 108 predicate places. [2024-11-20 09:35:20,270 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 107 transitions, 1439 flow [2024-11-20 09:35:20,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:20,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:20,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:20,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-20 09:35:20,271 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:20,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash -102369313, now seen corresponding path program 7 times [2024-11-20 09:35:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:20,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953135517] [2024-11-20 09:35:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:20,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:20,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953135517] [2024-11-20 09:35:20,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953135517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:20,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:20,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801292149] [2024-11-20 09:35:20,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:20,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:20,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:20,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 107 transitions, 1439 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:20,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:20,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:20,853 INFO L124 PetriNetUnfolderBase]: 1174/2034 cut-off events. [2024-11-20 09:35:20,854 INFO L125 PetriNetUnfolderBase]: For 12761/12761 co-relation queries the response was YES. [2024-11-20 09:35:20,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9557 conditions, 2034 events. 1174/2034 cut-off events. For 12761/12761 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10913 event pairs, 635 based on Foata normal form. 12/2046 useless extension candidates. Maximal degree in co-relation 9504. Up to 1495 conditions per place. [2024-11-20 09:35:20,868 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 96 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-11-20 09:35:20,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 136 transitions, 1856 flow [2024-11-20 09:35:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-20 09:35:20,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-20 09:35:20,869 INFO L175 Difference]: Start difference. First operand has 134 places, 107 transitions, 1439 flow. Second operand 9 states and 96 transitions. [2024-11-20 09:35:20,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 136 transitions, 1856 flow [2024-11-20 09:35:20,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 136 transitions, 1786 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:20,889 INFO L231 Difference]: Finished difference. Result has 140 places, 110 transitions, 1524 flow [2024-11-20 09:35:20,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1524, PETRI_PLACES=140, PETRI_TRANSITIONS=110} [2024-11-20 09:35:20,890 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 114 predicate places. [2024-11-20 09:35:20,890 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 110 transitions, 1524 flow [2024-11-20 09:35:20,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:20,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:20,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:20,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-20 09:35:20,890 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:20,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -68770085, now seen corresponding path program 8 times [2024-11-20 09:35:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359278644] [2024-11-20 09:35:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:21,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359278644] [2024-11-20 09:35:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359278644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:21,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99904021] [2024-11-20 09:35:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:21,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:21,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:21,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 110 transitions, 1524 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:21,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:21,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:21,565 INFO L124 PetriNetUnfolderBase]: 1174/2039 cut-off events. [2024-11-20 09:35:21,565 INFO L125 PetriNetUnfolderBase]: For 12422/12422 co-relation queries the response was YES. [2024-11-20 09:35:21,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 2039 events. 1174/2039 cut-off events. For 12422/12422 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10989 event pairs, 632 based on Foata normal form. 5/2044 useless extension candidates. Maximal degree in co-relation 9547. Up to 1495 conditions per place. [2024-11-20 09:35:21,582 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 92 selfloop transitions, 36 changer transitions 5/134 dead transitions. [2024-11-20 09:35:21,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 134 transitions, 1877 flow [2024-11-20 09:35:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-11-20 09:35:21,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-20 09:35:21,583 INFO L175 Difference]: Start difference. First operand has 140 places, 110 transitions, 1524 flow. Second operand 9 states and 90 transitions. [2024-11-20 09:35:21,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 134 transitions, 1877 flow [2024-11-20 09:35:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 134 transitions, 1767 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:21,604 INFO L231 Difference]: Finished difference. Result has 142 places, 109 transitions, 1474 flow [2024-11-20 09:35:21,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1474, PETRI_PLACES=142, PETRI_TRANSITIONS=109} [2024-11-20 09:35:21,605 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 116 predicate places. [2024-11-20 09:35:21,605 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 109 transitions, 1474 flow [2024-11-20 09:35:21,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:21,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:21,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:21,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-20 09:35:21,605 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:21,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash -600675833, now seen corresponding path program 5 times [2024-11-20 09:35:21,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:21,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879725565] [2024-11-20 09:35:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:21,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:21,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879725565] [2024-11-20 09:35:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879725565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:21,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533920902] [2024-11-20 09:35:21,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:21,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:21,832 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:21,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 09:35:21,908 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:21,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:21,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:35:21,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:22,086 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:35:22,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:35:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:35:22,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:22,246 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:35:22,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:35:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:35:22,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533920902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:22,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-11-20 09:35:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924381363] [2024-11-20 09:35:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:22,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 09:35:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 09:35:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2024-11-20 09:35:22,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:22,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 109 transitions, 1474 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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 09:35:22,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:22,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:22,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:25,102 INFO L124 PetriNetUnfolderBase]: 4662/8106 cut-off events. [2024-11-20 09:35:25,103 INFO L125 PetriNetUnfolderBase]: For 42793/42793 co-relation queries the response was YES. [2024-11-20 09:35:25,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36033 conditions, 8106 events. 4662/8106 cut-off events. For 42793/42793 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 57649 event pairs, 880 based on Foata normal form. 194/8300 useless extension candidates. Maximal degree in co-relation 35976. Up to 1424 conditions per place. [2024-11-20 09:35:25,147 INFO L140 encePairwiseOnDemand]: 11/28 looper letters, 384 selfloop transitions, 241 changer transitions 19/645 dead transitions. [2024-11-20 09:35:25,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 645 transitions, 7806 flow [2024-11-20 09:35:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-20 09:35:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-20 09:35:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 524 transitions. [2024-11-20 09:35:25,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40683229813664595 [2024-11-20 09:35:25,149 INFO L175 Difference]: Start difference. First operand has 142 places, 109 transitions, 1474 flow. Second operand 46 states and 524 transitions. [2024-11-20 09:35:25,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 645 transitions, 7806 flow [2024-11-20 09:35:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 645 transitions, 7556 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-20 09:35:25,260 INFO L231 Difference]: Finished difference. Result has 201 places, 334 transitions, 5280 flow [2024-11-20 09:35:25,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5280, PETRI_PLACES=201, PETRI_TRANSITIONS=334} [2024-11-20 09:35:25,261 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-11-20 09:35:25,261 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 334 transitions, 5280 flow [2024-11-20 09:35:25,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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 09:35:25,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:25,261 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:25,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 09:35:25,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:25,462 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:25,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -317493349, now seen corresponding path program 9 times [2024-11-20 09:35:25,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803480188] [2024-11-20 09:35:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:25,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803480188] [2024-11-20 09:35:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803480188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:25,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:25,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374258832] [2024-11-20 09:35:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:25,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:25,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:25,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 334 transitions, 5280 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:25,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:25,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:25,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:27,293 INFO L124 PetriNetUnfolderBase]: 4589/8014 cut-off events. [2024-11-20 09:35:27,293 INFO L125 PetriNetUnfolderBase]: For 91839/91839 co-relation queries the response was YES. [2024-11-20 09:35:27,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47496 conditions, 8014 events. 4589/8014 cut-off events. For 91839/91839 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 57131 event pairs, 2484 based on Foata normal form. 15/8025 useless extension candidates. Maximal degree in co-relation 47417. Up to 6406 conditions per place. [2024-11-20 09:35:27,342 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 246 selfloop transitions, 104 changer transitions 6/357 dead transitions. [2024-11-20 09:35:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 357 transitions, 6135 flow [2024-11-20 09:35:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-20 09:35:27,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-11-20 09:35:27,343 INFO L175 Difference]: Start difference. First operand has 201 places, 334 transitions, 5280 flow. Second operand 9 states and 89 transitions. [2024-11-20 09:35:27,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 357 transitions, 6135 flow [2024-11-20 09:35:27,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 357 transitions, 5851 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:27,610 INFO L231 Difference]: Finished difference. Result has 202 places, 331 transitions, 5148 flow [2024-11-20 09:35:27,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4996, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5148, PETRI_PLACES=202, PETRI_TRANSITIONS=331} [2024-11-20 09:35:27,611 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-11-20 09:35:27,611 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 331 transitions, 5148 flow [2024-11-20 09:35:27,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:27,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:27,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:27,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-20 09:35:27,612 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:27,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 469085493, now seen corresponding path program 10 times [2024-11-20 09:35:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753542665] [2024-11-20 09:35:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753542665] [2024-11-20 09:35:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753542665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:27,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:27,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151685200] [2024-11-20 09:35:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:27,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:27,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 331 transitions, 5148 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:27,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:27,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:27,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:29,409 INFO L124 PetriNetUnfolderBase]: 4478/7780 cut-off events. [2024-11-20 09:35:29,410 INFO L125 PetriNetUnfolderBase]: For 87280/87280 co-relation queries the response was YES. [2024-11-20 09:35:29,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45596 conditions, 7780 events. 4478/7780 cut-off events. For 87280/87280 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54757 event pairs, 2413 based on Foata normal form. 15/7795 useless extension candidates. Maximal degree in co-relation 45519. Up to 6406 conditions per place. [2024-11-20 09:35:29,456 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 243 selfloop transitions, 100 changer transitions 6/350 dead transitions. [2024-11-20 09:35:29,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 350 transitions, 5924 flow [2024-11-20 09:35:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-20 09:35:29,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-11-20 09:35:29,457 INFO L175 Difference]: Start difference. First operand has 202 places, 331 transitions, 5148 flow. Second operand 9 states and 89 transitions. [2024-11-20 09:35:29,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 350 transitions, 5924 flow [2024-11-20 09:35:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 350 transitions, 5722 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:29,694 INFO L231 Difference]: Finished difference. Result has 202 places, 325 transitions, 5037 flow [2024-11-20 09:35:29,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4884, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5037, PETRI_PLACES=202, PETRI_TRANSITIONS=325} [2024-11-20 09:35:29,695 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-11-20 09:35:29,695 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 325 transitions, 5037 flow [2024-11-20 09:35:29,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:29,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:29,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:29,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-20 09:35:29,695 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:29,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -872369295, now seen corresponding path program 6 times [2024-11-20 09:35:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593520843] [2024-11-20 09:35:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593520843] [2024-11-20 09:35:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593520843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:29,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:29,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093005693] [2024-11-20 09:35:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:29,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:29,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:29,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 325 transitions, 5037 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:29,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:29,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:29,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:31,339 INFO L124 PetriNetUnfolderBase]: 4472/7771 cut-off events. [2024-11-20 09:35:31,339 INFO L125 PetriNetUnfolderBase]: For 87898/87898 co-relation queries the response was YES. [2024-11-20 09:35:31,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45522 conditions, 7771 events. 4472/7771 cut-off events. For 87898/87898 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54709 event pairs, 2433 based on Foata normal form. 12/7783 useless extension candidates. Maximal degree in co-relation 45445. Up to 6406 conditions per place. [2024-11-20 09:35:31,389 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 244 selfloop transitions, 97 changer transitions 6/348 dead transitions. [2024-11-20 09:35:31,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 348 transitions, 5922 flow [2024-11-20 09:35:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-11-20 09:35:31,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32936507936507936 [2024-11-20 09:35:31,390 INFO L175 Difference]: Start difference. First operand has 202 places, 325 transitions, 5037 flow. Second operand 9 states and 83 transitions. [2024-11-20 09:35:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 348 transitions, 5922 flow [2024-11-20 09:35:31,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 348 transitions, 5714 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-20 09:35:31,649 INFO L231 Difference]: Finished difference. Result has 201 places, 324 transitions, 5022 flow [2024-11-20 09:35:31,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5022, PETRI_PLACES=201, PETRI_TRANSITIONS=324} [2024-11-20 09:35:31,650 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-11-20 09:35:31,650 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 324 transitions, 5022 flow [2024-11-20 09:35:31,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:31,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:31,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:31,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-20 09:35:31,650 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:31,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash 646669503, now seen corresponding path program 7 times [2024-11-20 09:35:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468857249] [2024-11-20 09:35:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:31,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:31,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468857249] [2024-11-20 09:35:31,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468857249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:31,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:31,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838099567] [2024-11-20 09:35:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:31,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:31,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:31,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 324 transitions, 5022 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:31,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:31,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:31,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:33,282 INFO L124 PetriNetUnfolderBase]: 4454/7741 cut-off events. [2024-11-20 09:35:33,283 INFO L125 PetriNetUnfolderBase]: For 88108/88108 co-relation queries the response was YES. [2024-11-20 09:35:33,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45332 conditions, 7741 events. 4454/7741 cut-off events. For 88108/88108 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54415 event pairs, 2461 based on Foata normal form. 12/7753 useless extension candidates. Maximal degree in co-relation 45255. Up to 6406 conditions per place. [2024-11-20 09:35:33,333 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 241 selfloop transitions, 99 changer transitions 3/344 dead transitions. [2024-11-20 09:35:33,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 344 transitions, 5843 flow [2024-11-20 09:35:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-11-20 09:35:33,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-20 09:35:33,334 INFO L175 Difference]: Start difference. First operand has 201 places, 324 transitions, 5022 flow. Second operand 9 states and 84 transitions. [2024-11-20 09:35:33,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 344 transitions, 5843 flow [2024-11-20 09:35:33,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 344 transitions, 5616 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-20 09:35:33,675 INFO L231 Difference]: Finished difference. Result has 197 places, 323 transitions, 4981 flow [2024-11-20 09:35:33,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4795, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4981, PETRI_PLACES=197, PETRI_TRANSITIONS=323} [2024-11-20 09:35:33,675 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2024-11-20 09:35:33,675 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 323 transitions, 4981 flow [2024-11-20 09:35:33,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:33,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:33,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:33,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-20 09:35:33,676 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:33,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1975366923, now seen corresponding path program 8 times [2024-11-20 09:35:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814393980] [2024-11-20 09:35:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814393980] [2024-11-20 09:35:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814393980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:33,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:33,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:33,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687209343] [2024-11-20 09:35:33,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:33,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:33,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:33,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:33,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:33,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 323 transitions, 4981 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:33,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:33,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:33,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:35,101 INFO L124 PetriNetUnfolderBase]: 4423/7681 cut-off events. [2024-11-20 09:35:35,101 INFO L125 PetriNetUnfolderBase]: For 86688/86688 co-relation queries the response was YES. [2024-11-20 09:35:35,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44919 conditions, 7681 events. 4423/7681 cut-off events. For 86688/86688 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 53972 event pairs, 2426 based on Foata normal form. 12/7693 useless extension candidates. Maximal degree in co-relation 44846. Up to 6365 conditions per place. [2024-11-20 09:35:35,157 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 239 selfloop transitions, 96 changer transitions 3/339 dead transitions. [2024-11-20 09:35:35,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 339 transitions, 5723 flow [2024-11-20 09:35:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-11-20 09:35:35,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32936507936507936 [2024-11-20 09:35:35,159 INFO L175 Difference]: Start difference. First operand has 197 places, 323 transitions, 4981 flow. Second operand 9 states and 83 transitions. [2024-11-20 09:35:35,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 339 transitions, 5723 flow [2024-11-20 09:35:35,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 339 transitions, 5531 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:35,439 INFO L231 Difference]: Finished difference. Result has 197 places, 319 transitions, 4898 flow [2024-11-20 09:35:35,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4898, PETRI_PLACES=197, PETRI_TRANSITIONS=319} [2024-11-20 09:35:35,439 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2024-11-20 09:35:35,440 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 319 transitions, 4898 flow [2024-11-20 09:35:35,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:35,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:35,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:35,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-20 09:35:35,441 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:35,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash 536257337, now seen corresponding path program 11 times [2024-11-20 09:35:35,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800561566] [2024-11-20 09:35:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:35,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800561566] [2024-11-20 09:35:35,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800561566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:35,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483770143] [2024-11-20 09:35:35,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:35,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:35,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:35,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 09:35:35,916 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:35,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:35,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:35:35,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:35,979 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:35:35,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 09:35:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:35,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:36,092 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:36,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483770143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:36,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-11-20 09:35:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050760222] [2024-11-20 09:35:36,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:36,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:35:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:35:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:35:36,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 319 transitions, 4898 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 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 09:35:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:37,912 INFO L124 PetriNetUnfolderBase]: 6441/11224 cut-off events. [2024-11-20 09:35:37,912 INFO L125 PetriNetUnfolderBase]: For 114596/114596 co-relation queries the response was YES. [2024-11-20 09:35:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62776 conditions, 11224 events. 6441/11224 cut-off events. For 114596/114596 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 83963 event pairs, 2113 based on Foata normal form. 36/11260 useless extension candidates. Maximal degree in co-relation 62703. Up to 5071 conditions per place. [2024-11-20 09:35:37,990 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 371 selfloop transitions, 140 changer transitions 0/512 dead transitions. [2024-11-20 09:35:37,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 512 transitions, 8243 flow [2024-11-20 09:35:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-11-20 09:35:37,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-20 09:35:37,991 INFO L175 Difference]: Start difference. First operand has 197 places, 319 transitions, 4898 flow. Second operand 12 states and 138 transitions. [2024-11-20 09:35:37,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 512 transitions, 8243 flow [2024-11-20 09:35:38,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 512 transitions, 7997 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:38,545 INFO L231 Difference]: Finished difference. Result has 203 places, 343 transitions, 5568 flow [2024-11-20 09:35:38,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5568, PETRI_PLACES=203, PETRI_TRANSITIONS=343} [2024-11-20 09:35:38,546 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2024-11-20 09:35:38,546 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 343 transitions, 5568 flow [2024-11-20 09:35:38,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 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 09:35:38,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:38,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:38,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 09:35:38,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-20 09:35:38,747 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:38,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash 188378157, now seen corresponding path program 9 times [2024-11-20 09:35:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950084063] [2024-11-20 09:35:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950084063] [2024-11-20 09:35:38,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950084063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:38,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:38,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106137809] [2024-11-20 09:35:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:38,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:38,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:38,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 343 transitions, 5568 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:38,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:38,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:38,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:40,877 INFO L124 PetriNetUnfolderBase]: 6534/11382 cut-off events. [2024-11-20 09:35:40,877 INFO L125 PetriNetUnfolderBase]: For 135527/135527 co-relation queries the response was YES. [2024-11-20 09:35:40,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66793 conditions, 11382 events. 6534/11382 cut-off events. For 135527/135527 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 85515 event pairs, 3274 based on Foata normal form. 56/11438 useless extension candidates. Maximal degree in co-relation 66716. Up to 8783 conditions per place. [2024-11-20 09:35:40,956 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 295 selfloop transitions, 136 changer transitions 0/432 dead transitions. [2024-11-20 09:35:40,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 432 transitions, 7460 flow [2024-11-20 09:35:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-11-20 09:35:40,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-20 09:35:40,957 INFO L175 Difference]: Start difference. First operand has 203 places, 343 transitions, 5568 flow. Second operand 9 states and 102 transitions. [2024-11-20 09:35:40,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 432 transitions, 7460 flow [2024-11-20 09:35:41,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 432 transitions, 7218 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:41,586 INFO L231 Difference]: Finished difference. Result has 208 places, 359 transitions, 5994 flow [2024-11-20 09:35:41,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5994, PETRI_PLACES=208, PETRI_TRANSITIONS=359} [2024-11-20 09:35:41,587 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 182 predicate places. [2024-11-20 09:35:41,587 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 359 transitions, 5994 flow [2024-11-20 09:35:41,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:41,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:41,587 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:41,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-20 09:35:41,588 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:41,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:41,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1034053993, now seen corresponding path program 12 times [2024-11-20 09:35:41,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:41,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011435460] [2024-11-20 09:35:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:41,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011435460] [2024-11-20 09:35:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011435460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560708279] [2024-11-20 09:35:41,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:35:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:41,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:41,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 09:35:41,891 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:35:41,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:41,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:35:41,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:41,942 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 09:35:41,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 09:35:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:41,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:42,015 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-20 09:35:42,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-20 09:35:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560708279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:42,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:42,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-20 09:35:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853393726] [2024-11-20 09:35:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:42,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:35:42,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:35:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:35:42,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:42,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 359 transitions, 5994 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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 09:35:42,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:42,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:42,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:44,198 INFO L124 PetriNetUnfolderBase]: 6849/11931 cut-off events. [2024-11-20 09:35:44,198 INFO L125 PetriNetUnfolderBase]: For 146260/146260 co-relation queries the response was YES. [2024-11-20 09:35:44,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70723 conditions, 11931 events. 6849/11931 cut-off events. For 146260/146260 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 90577 event pairs, 3405 based on Foata normal form. 54/11985 useless extension candidates. Maximal degree in co-relation 70644. Up to 8660 conditions per place. [2024-11-20 09:35:44,282 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 290 selfloop transitions, 145 changer transitions 0/436 dead transitions. [2024-11-20 09:35:44,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 436 transitions, 7765 flow [2024-11-20 09:35:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:35:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:35:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-11-20 09:35:44,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-20 09:35:44,283 INFO L175 Difference]: Start difference. First operand has 208 places, 359 transitions, 5994 flow. Second operand 10 states and 108 transitions. [2024-11-20 09:35:44,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 436 transitions, 7765 flow [2024-11-20 09:35:45,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 436 transitions, 7428 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-11-20 09:35:45,008 INFO L231 Difference]: Finished difference. Result has 214 places, 369 transitions, 6196 flow [2024-11-20 09:35:45,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6196, PETRI_PLACES=214, PETRI_TRANSITIONS=369} [2024-11-20 09:35:45,008 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 188 predicate places. [2024-11-20 09:35:45,008 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 369 transitions, 6196 flow [2024-11-20 09:35:45,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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 09:35:45,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:45,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:45,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 09:35:45,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-20 09:35:45,209 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:45,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash -62205495, now seen corresponding path program 13 times [2024-11-20 09:35:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010207069] [2024-11-20 09:35:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010207069] [2024-11-20 09:35:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010207069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:45,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33160889] [2024-11-20 09:35:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:35:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:45,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:45,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 09:35:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:45,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 09:35:45,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:45,576 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:35:45,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 09:35:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:45,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:45,657 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:45,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33160889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:45,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-11-20 09:35:45,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039342519] [2024-11-20 09:35:45,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:45,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:35:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:35:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:35:45,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:45,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 369 transitions, 6196 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:45,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:45,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:45,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:47,674 INFO L124 PetriNetUnfolderBase]: 6660/11580 cut-off events. [2024-11-20 09:35:47,675 INFO L125 PetriNetUnfolderBase]: For 134957/134957 co-relation queries the response was YES. [2024-11-20 09:35:47,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68675 conditions, 11580 events. 6660/11580 cut-off events. For 134957/134957 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 86811 event pairs, 1139 based on Foata normal form. 54/11634 useless extension candidates. Maximal degree in co-relation 68594. Up to 8354 conditions per place. [2024-11-20 09:35:47,772 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 326 selfloop transitions, 145 changer transitions 2/474 dead transitions. [2024-11-20 09:35:47,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 474 transitions, 8316 flow [2024-11-20 09:35:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:35:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:35:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-11-20 09:35:47,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-20 09:35:47,773 INFO L175 Difference]: Start difference. First operand has 214 places, 369 transitions, 6196 flow. Second operand 10 states and 100 transitions. [2024-11-20 09:35:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 474 transitions, 8316 flow [2024-11-20 09:35:48,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 474 transitions, 8117 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-11-20 09:35:48,441 INFO L231 Difference]: Finished difference. Result has 219 places, 373 transitions, 6413 flow [2024-11-20 09:35:48,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6413, PETRI_PLACES=219, PETRI_TRANSITIONS=373} [2024-11-20 09:35:48,442 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-11-20 09:35:48,442 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 373 transitions, 6413 flow [2024-11-20 09:35:48,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 09:35:48,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:48,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:48,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 09:35:48,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-20 09:35:48,643 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:48,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1589112913, now seen corresponding path program 10 times [2024-11-20 09:35:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:48,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997404821] [2024-11-20 09:35:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:48,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:48,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997404821] [2024-11-20 09:35:48,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997404821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:48,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:48,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391090113] [2024-11-20 09:35:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:48,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:48,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:48,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 373 transitions, 6413 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:48,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:48,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:48,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:50,889 INFO L124 PetriNetUnfolderBase]: 6660/11592 cut-off events. [2024-11-20 09:35:50,889 INFO L125 PetriNetUnfolderBase]: For 140719/140719 co-relation queries the response was YES. [2024-11-20 09:35:50,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69681 conditions, 11592 events. 6660/11592 cut-off events. For 140719/140719 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 87023 event pairs, 3311 based on Foata normal form. 12/11604 useless extension candidates. Maximal degree in co-relation 69598. Up to 8984 conditions per place. [2024-11-20 09:35:50,982 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 304 selfloop transitions, 137 changer transitions 3/445 dead transitions. [2024-11-20 09:35:50,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 445 transitions, 8014 flow [2024-11-20 09:35:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-11-20 09:35:50,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-11-20 09:35:50,983 INFO L175 Difference]: Start difference. First operand has 219 places, 373 transitions, 6413 flow. Second operand 9 states and 88 transitions. [2024-11-20 09:35:50,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 445 transitions, 8014 flow [2024-11-20 09:35:51,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 445 transitions, 7672 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:51,744 INFO L231 Difference]: Finished difference. Result has 221 places, 373 transitions, 6351 flow [2024-11-20 09:35:51,744 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6351, PETRI_PLACES=221, PETRI_TRANSITIONS=373} [2024-11-20 09:35:51,744 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 195 predicate places. [2024-11-20 09:35:51,745 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 373 transitions, 6351 flow [2024-11-20 09:35:51,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:51,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:51,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:51,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-11-20 09:35:51,745 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:51,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1413500475, now seen corresponding path program 14 times [2024-11-20 09:35:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641737015] [2024-11-20 09:35:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641737015] [2024-11-20 09:35:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641737015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:51,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142529753] [2024-11-20 09:35:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:51,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:51,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:51,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:51,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 373 transitions, 6351 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:51,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:51,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:51,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:54,172 INFO L124 PetriNetUnfolderBase]: 6648/11583 cut-off events. [2024-11-20 09:35:54,172 INFO L125 PetriNetUnfolderBase]: For 136357/136357 co-relation queries the response was YES. [2024-11-20 09:35:54,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69248 conditions, 11583 events. 6648/11583 cut-off events. For 136357/136357 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 87164 event pairs, 3470 based on Foata normal form. 15/11598 useless extension candidates. Maximal degree in co-relation 69165. Up to 8984 conditions per place. [2024-11-20 09:35:54,250 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 277 selfloop transitions, 133 changer transitions 5/416 dead transitions. [2024-11-20 09:35:54,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 416 transitions, 7533 flow [2024-11-20 09:35:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-11-20 09:35:54,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-11-20 09:35:54,252 INFO L175 Difference]: Start difference. First operand has 221 places, 373 transitions, 6351 flow. Second operand 9 states and 87 transitions. [2024-11-20 09:35:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 416 transitions, 7533 flow [2024-11-20 09:35:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 416 transitions, 7251 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:54,768 INFO L231 Difference]: Finished difference. Result has 222 places, 373 transitions, 6349 flow [2024-11-20 09:35:54,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6349, PETRI_PLACES=222, PETRI_TRANSITIONS=373} [2024-11-20 09:35:54,769 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 196 predicate places. [2024-11-20 09:35:54,769 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 373 transitions, 6349 flow [2024-11-20 09:35:54,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:54,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:54,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:54,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-11-20 09:35:54,769 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:54,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1216445901, now seen corresponding path program 15 times [2024-11-20 09:35:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:54,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225020508] [2024-11-20 09:35:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225020508] [2024-11-20 09:35:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225020508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460822046] [2024-11-20 09:35:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:54,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:54,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:54,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 373 transitions, 6349 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:54,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:54,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:54,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:57,147 INFO L124 PetriNetUnfolderBase]: 6654/11595 cut-off events. [2024-11-20 09:35:57,147 INFO L125 PetriNetUnfolderBase]: For 135760/135760 co-relation queries the response was YES. [2024-11-20 09:35:57,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69170 conditions, 11595 events. 6654/11595 cut-off events. For 135760/135760 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 87196 event pairs, 3495 based on Foata normal form. 15/11610 useless extension candidates. Maximal degree in co-relation 69086. Up to 8990 conditions per place. [2024-11-20 09:35:57,269 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 280 selfloop transitions, 137 changer transitions 5/423 dead transitions. [2024-11-20 09:35:57,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 423 transitions, 7716 flow [2024-11-20 09:35:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-11-20 09:35:57,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-11-20 09:35:57,270 INFO L175 Difference]: Start difference. First operand has 222 places, 373 transitions, 6349 flow. Second operand 9 states and 92 transitions. [2024-11-20 09:35:57,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 423 transitions, 7716 flow [2024-11-20 09:35:58,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 423 transitions, 7432 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:58,107 INFO L231 Difference]: Finished difference. Result has 224 places, 379 transitions, 6494 flow [2024-11-20 09:35:58,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=224, PETRI_TRANSITIONS=379} [2024-11-20 09:35:58,108 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 198 predicate places. [2024-11-20 09:35:58,108 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 379 transitions, 6494 flow [2024-11-20 09:35:58,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:58,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:58,108 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:58,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-11-20 09:35:58,109 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:58,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1813782559, now seen corresponding path program 16 times [2024-11-20 09:35:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101485348] [2024-11-20 09:35:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:35:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101485348] [2024-11-20 09:35:58,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101485348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:58,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:35:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066579648] [2024-11-20 09:35:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:58,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:35:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:35:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:35:58,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:35:58,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 379 transitions, 6494 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:35:58,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:58,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:35:58,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:00,427 INFO L124 PetriNetUnfolderBase]: 6633/11559 cut-off events. [2024-11-20 09:36:00,427 INFO L125 PetriNetUnfolderBase]: For 135040/135040 co-relation queries the response was YES. [2024-11-20 09:36:00,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68960 conditions, 11559 events. 6633/11559 cut-off events. For 135040/135040 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 87008 event pairs, 3335 based on Foata normal form. 15/11574 useless extension candidates. Maximal degree in co-relation 68874. Up to 8975 conditions per place. [2024-11-20 09:36:00,794 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 302 selfloop transitions, 136 changer transitions 8/447 dead transitions. [2024-11-20 09:36:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 447 transitions, 8076 flow [2024-11-20 09:36:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-11-20 09:36:00,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-11-20 09:36:00,795 INFO L175 Difference]: Start difference. First operand has 224 places, 379 transitions, 6494 flow. Second operand 9 states and 86 transitions. [2024-11-20 09:36:00,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 447 transitions, 8076 flow [2024-11-20 09:36:01,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 447 transitions, 7802 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 09:36:01,385 INFO L231 Difference]: Finished difference. Result has 227 places, 379 transitions, 6508 flow [2024-11-20 09:36:01,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6201, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6508, PETRI_PLACES=227, PETRI_TRANSITIONS=379} [2024-11-20 09:36:01,385 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 201 predicate places. [2024-11-20 09:36:01,385 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 379 transitions, 6508 flow [2024-11-20 09:36:01,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:36:01,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:01,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:01,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-11-20 09:36:01,386 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:01,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 222114165, now seen corresponding path program 17 times [2024-11-20 09:36:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154252735] [2024-11-20 09:36:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154252735] [2024-11-20 09:36:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154252735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841633307] [2024-11-20 09:36:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:01,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:01,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:01,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:01,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 09:36:01,669 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:01,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:01,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:36:01,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:01,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:01,866 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:36:01,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:36:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:01,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841633307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:01,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-20 09:36:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562557097] [2024-11-20 09:36:01,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:01,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:36:01,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:36:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:36:01,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:36:01,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 379 transitions, 6508 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 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 09:36:01,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:01,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:36:01,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:04,455 INFO L124 PetriNetUnfolderBase]: 7219/12581 cut-off events. [2024-11-20 09:36:04,455 INFO L125 PetriNetUnfolderBase]: For 143306/143306 co-relation queries the response was YES. [2024-11-20 09:36:04,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74002 conditions, 12581 events. 7219/12581 cut-off events. For 143306/143306 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 95618 event pairs, 2649 based on Foata normal form. 36/12617 useless extension candidates. Maximal degree in co-relation 73914. Up to 6715 conditions per place. [2024-11-20 09:36:04,596 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 369 selfloop transitions, 162 changer transitions 2/534 dead transitions. [2024-11-20 09:36:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 534 transitions, 9318 flow [2024-11-20 09:36:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:36:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:36:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2024-11-20 09:36:04,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-11-20 09:36:04,597 INFO L175 Difference]: Start difference. First operand has 227 places, 379 transitions, 6508 flow. Second operand 13 states and 126 transitions. [2024-11-20 09:36:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 534 transitions, 9318 flow [2024-11-20 09:36:05,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 534 transitions, 8999 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:05,330 INFO L231 Difference]: Finished difference. Result has 234 places, 392 transitions, 6876 flow [2024-11-20 09:36:05,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6876, PETRI_PLACES=234, PETRI_TRANSITIONS=392} [2024-11-20 09:36:05,331 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 208 predicate places. [2024-11-20 09:36:05,331 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 392 transitions, 6876 flow [2024-11-20 09:36:05,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 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 09:36:05,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:05,331 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:05,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-20 09:36:05,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-20 09:36:05,532 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:05,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1016050527, now seen corresponding path program 11 times [2024-11-20 09:36:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:05,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710356051] [2024-11-20 09:36:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710356051] [2024-11-20 09:36:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710356051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:36:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209055248] [2024-11-20 09:36:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:06,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:36:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:06,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:36:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:36:06,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:36:06,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 392 transitions, 6876 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:36:06,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:06,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:36:06,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:08,091 INFO L124 PetriNetUnfolderBase]: 7207/12569 cut-off events. [2024-11-20 09:36:08,092 INFO L125 PetriNetUnfolderBase]: For 152326/152326 co-relation queries the response was YES. [2024-11-20 09:36:08,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75615 conditions, 12569 events. 7207/12569 cut-off events. For 152326/152326 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 96375 event pairs, 3646 based on Foata normal form. 12/12581 useless extension candidates. Maximal degree in co-relation 75524. Up to 10028 conditions per place. [2024-11-20 09:36:08,215 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 333 selfloop transitions, 129 changer transitions 10/473 dead transitions. [2024-11-20 09:36:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 473 transitions, 8585 flow [2024-11-20 09:36:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-11-20 09:36:08,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-11-20 09:36:08,216 INFO L175 Difference]: Start difference. First operand has 234 places, 392 transitions, 6876 flow. Second operand 9 states and 87 transitions. [2024-11-20 09:36:08,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 473 transitions, 8585 flow [2024-11-20 09:36:09,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 473 transitions, 8368 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:09,206 INFO L231 Difference]: Finished difference. Result has 234 places, 385 transitions, 6769 flow [2024-11-20 09:36:09,206 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6769, PETRI_PLACES=234, PETRI_TRANSITIONS=385} [2024-11-20 09:36:09,207 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 208 predicate places. [2024-11-20 09:36:09,207 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 385 transitions, 6769 flow [2024-11-20 09:36:09,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 09:36:09,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:09,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:09,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-11-20 09:36:09,207 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:09,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 213244371, now seen corresponding path program 18 times [2024-11-20 09:36:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084649677] [2024-11-20 09:36:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084649677] [2024-11-20 09:36:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084649677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321527446] [2024-11-20 09:36:09,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:09,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:09,429 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:09,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 09:36:09,513 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:36:09,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:09,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:36:09,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:09,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:09,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-20 09:36:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:09,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:09,648 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-20 09:36:09,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-20 09:36:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:09,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321527446] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:09,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:36:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-11-20 09:36:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776349120] [2024-11-20 09:36:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:09,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:36:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:36:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:36:09,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-11-20 09:36:09,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 385 transitions, 6769 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 09:36:09,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:09,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-11-20 09:36:09,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand