./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:35:37,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:35:37,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:35:37,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:35:37,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:35:37,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:35:37,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:35:37,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:35:37,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:35:37,861 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:35:37,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:35:37,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:35:37,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:35:37,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:35:37,864 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:35:37,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:35:37,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:35:37,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:35:37,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:35:37,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:35:37,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:35:37,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:35:37,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:35:37,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:35:37,869 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:35:37,869 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:35:37,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:35:37,869 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:35:37,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:35:37,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:35:37,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:35:37,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:35:37,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:35:37,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:35:37,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:35:37,871 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:35:37,871 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:35:37,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:35:37,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:35:37,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:35:37,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:35:37,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:35:37,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-10-24 12:35:38,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:35:38,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:35:38,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:35:38,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:35:38,154 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:35:38,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-10-24 12:35:39,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:35:39,873 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:35:39,874 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-10-24 12:35:39,887 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/496869ac8/c0c5c9c856ec40aaa4179ff19257c2b1/FLAGb71a238d8 [2024-10-24 12:35:40,237 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/496869ac8/c0c5c9c856ec40aaa4179ff19257c2b1 [2024-10-24 12:35:40,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:35:40,240 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:35:40,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:35:40,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:35:40,248 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:35:40,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117d8a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40, skipping insertion in model container [2024-10-24 12:35:40,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,286 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:35:40,526 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-10-24 12:35:40,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:35:40,557 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:35:40,586 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-10-24 12:35:40,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:35:40,611 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:35:40,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40 WrapperNode [2024-10-24 12:35:40,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:35:40,626 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:35:40,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:35:40,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:35:40,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,704 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2024-10-24 12:35:40,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:35:40,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:35:40,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:35:40,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:35:40,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,733 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-24 12:35:40,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:35:40,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:35:40,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:35:40,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:35:40,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (1/1) ... [2024-10-24 12:35:40,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:35:40,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:40,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:35:40,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:35:40,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:35:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:35:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:35:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:35:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:35:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 12:35:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 12:35:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:35:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:35:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:35:40,853 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:35:40,971 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:35:40,975 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:35:41,257 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:35:41,258 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:35:41,456 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:35:41,456 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 12:35:41,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:41 BoogieIcfgContainer [2024-10-24 12:35:41,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:35:41,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:35:41,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:35:41,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:35:41,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:35:40" (1/3) ... [2024-10-24 12:35:41,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f9c871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:41, skipping insertion in model container [2024-10-24 12:35:41,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:40" (2/3) ... [2024-10-24 12:35:41,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f9c871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:41, skipping insertion in model container [2024-10-24 12:35:41,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:41" (3/3) ... [2024-10-24 12:35:41,466 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-10-24 12:35:41,480 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:35:41,480 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:35:41,480 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:35:41,526 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 12:35:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-10-24 12:35:41,594 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-24 12:35:41,594 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:35:41,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-24 12:35:41,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-10-24 12:35:41,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-10-24 12:35:41,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:35:41,617 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;@449ba47a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:35:41,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 12:35:41,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:35:41,635 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-10-24 12:35:41,635 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:35:41,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:41,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:41,637 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:41,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash 368648374, now seen corresponding path program 1 times [2024-10-24 12:35:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:41,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749145641] [2024-10-24 12:35:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:42,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749145641] [2024-10-24 12:35:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749145641] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:42,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:42,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:35:42,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60287088] [2024-10-24 12:35:42,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:42,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:35:42,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:35:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:35:42,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:42,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:42,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:42,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:42,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:42,637 INFO L124 PetriNetUnfolderBase]: 387/567 cut-off events. [2024-10-24 12:35:42,637 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-24 12:35:42,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 567 events. 387/567 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1795 event pairs, 124 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-10-24 12:35:42,647 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2024-10-24 12:35:42,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 191 flow [2024-10-24 12:35:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:35:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:35:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-10-24 12:35:42,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-24 12:35:42,663 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-10-24 12:35:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 191 flow [2024-10-24 12:35:42,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 12:35:42,669 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2024-10-24 12:35:42,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-10-24 12:35:42,674 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-10-24 12:35:42,675 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2024-10-24 12:35:42,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:42,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:42,675 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] [2024-10-24 12:35:42,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:35:42,676 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:42,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1718815074, now seen corresponding path program 1 times [2024-10-24 12:35:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293185732] [2024-10-24 12:35:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:42,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:42,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293185732] [2024-10-24 12:35:42,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293185732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:42,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:42,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:35:42,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307911670] [2024-10-24 12:35:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:42,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:35:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:35:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:35:42,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:42,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:42,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:42,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:42,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:43,080 INFO L124 PetriNetUnfolderBase]: 703/1050 cut-off events. [2024-10-24 12:35:43,082 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-10-24 12:35:43,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1050 events. 703/1050 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3873 event pairs, 401 based on Foata normal form. 46/1094 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2024-10-24 12:35:43,091 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-10-24 12:35:43,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 61 transitions, 298 flow [2024-10-24 12:35:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:35:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:35:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-10-24 12:35:43,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-10-24 12:35:43,094 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 5 states and 74 transitions. [2024-10-24 12:35:43,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 61 transitions, 298 flow [2024-10-24 12:35:43,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:35:43,096 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 112 flow [2024-10-24 12:35:43,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-10-24 12:35:43,097 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-10-24 12:35:43,098 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 112 flow [2024-10-24 12:35:43,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:43,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:43,098 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] [2024-10-24 12:35:43,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:35:43,099 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:43,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:43,101 INFO L85 PathProgramCache]: Analyzing trace with hash -546188461, now seen corresponding path program 1 times [2024-10-24 12:35:43,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:43,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274444178] [2024-10-24 12:35:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:43,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:43,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:43,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274444178] [2024-10-24 12:35:43,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274444178] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:43,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:43,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:35:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915436285] [2024-10-24 12:35:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:43,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:35:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:35:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:35:43,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:43,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:43,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:43,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:43,423 INFO L124 PetriNetUnfolderBase]: 611/931 cut-off events. [2024-10-24 12:35:43,424 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-10-24 12:35:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 931 events. 611/931 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3434 event pairs, 372 based on Foata normal form. 41/971 useless extension candidates. Maximal degree in co-relation 1457. Up to 567 conditions per place. [2024-10-24 12:35:43,429 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-10-24 12:35:43,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 300 flow [2024-10-24 12:35:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:35:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:35:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-10-24 12:35:43,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-10-24 12:35:43,433 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 112 flow. Second operand 5 states and 71 transitions. [2024-10-24 12:35:43,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 300 flow [2024-10-24 12:35:43,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:35:43,438 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 135 flow [2024-10-24 12:35:43,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-10-24 12:35:43,439 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-10-24 12:35:43,439 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 135 flow [2024-10-24 12:35:43,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:43,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:43,440 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] [2024-10-24 12:35:43,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:35:43,440 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:43,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1422309272, now seen corresponding path program 1 times [2024-10-24 12:35:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:43,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187953942] [2024-10-24 12:35:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187953942] [2024-10-24 12:35:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187953942] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:43,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:43,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:35:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122018239] [2024-10-24 12:35:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:43,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:35:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:35:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:35:43,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:43,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:43,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:43,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:43,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:43,768 INFO L124 PetriNetUnfolderBase]: 511/784 cut-off events. [2024-10-24 12:35:43,768 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-10-24 12:35:43,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 784 events. 511/784 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2728 event pairs, 333 based on Foata normal form. 22/805 useless extension candidates. Maximal degree in co-relation 1615. Up to 567 conditions per place. [2024-10-24 12:35:43,773 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 2 changer transitions 23/50 dead transitions. [2024-10-24 12:35:43,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 293 flow [2024-10-24 12:35:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:35:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:35:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-10-24 12:35:43,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-10-24 12:35:43,777 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 135 flow. Second operand 5 states and 67 transitions. [2024-10-24 12:35:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 293 flow [2024-10-24 12:35:43,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:35:43,782 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 108 flow [2024-10-24 12:35:43,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2024-10-24 12:35:43,783 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-10-24 12:35:43,785 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 108 flow [2024-10-24 12:35:43,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:43,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:43,785 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] [2024-10-24 12:35:43,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:35:43,786 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:43,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2051914133, now seen corresponding path program 1 times [2024-10-24 12:35:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325933318] [2024-10-24 12:35:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:43,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325933318] [2024-10-24 12:35:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325933318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405072091] [2024-10-24 12:35:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:43,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:43,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:43,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:35:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:44,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:35:44,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:44,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:44,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405072091] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:44,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:35:44,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-10-24 12:35:44,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590674647] [2024-10-24 12:35:44,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:44,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:35:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:35:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:35:44,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:44,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:44,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:44,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:44,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:44,481 INFO L124 PetriNetUnfolderBase]: 517/764 cut-off events. [2024-10-24 12:35:44,481 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-10-24 12:35:44,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 764 events. 517/764 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2657 event pairs, 150 based on Foata normal form. 14/777 useless extension candidates. Maximal degree in co-relation 2321. Up to 379 conditions per place. [2024-10-24 12:35:44,486 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-10-24 12:35:44,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 390 flow [2024-10-24 12:35:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:35:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:35:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-10-24 12:35:44,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-24 12:35:44,487 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 108 flow. Second operand 7 states and 84 transitions. [2024-10-24 12:35:44,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 390 flow [2024-10-24 12:35:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 322 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-10-24 12:35:44,497 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 139 flow [2024-10-24 12:35:44,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-10-24 12:35:44,498 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-10-24 12:35:44,498 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 139 flow [2024-10-24 12:35:44,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:44,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:44,498 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] [2024-10-24 12:35:44,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:35:44,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:44,700 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:44,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1252915929, now seen corresponding path program 2 times [2024-10-24 12:35:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193919061] [2024-10-24 12:35:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:44,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193919061] [2024-10-24 12:35:44,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193919061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030320002] [2024-10-24 12:35:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:35:44,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:44,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:44,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:44,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:35:44,928 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:44,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:44,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:35:44,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:45,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030320002] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:45,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:35:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-24 12:35:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594122934] [2024-10-24 12:35:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:45,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:35:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:35:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:35:45,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:45,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:45,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:45,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:45,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:45,301 INFO L124 PetriNetUnfolderBase]: 678/1005 cut-off events. [2024-10-24 12:35:45,301 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2024-10-24 12:35:45,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1005 events. 678/1005 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3648 event pairs, 240 based on Foata normal form. 12/1016 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-10-24 12:35:45,308 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-10-24 12:35:45,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 435 flow [2024-10-24 12:35:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:35:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:35:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-10-24 12:35:45,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-10-24 12:35:45,310 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 139 flow. Second operand 7 states and 80 transitions. [2024-10-24 12:35:45,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 435 flow [2024-10-24 12:35:45,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 400 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-10-24 12:35:45,314 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 196 flow [2024-10-24 12:35:45,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-24 12:35:45,315 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-10-24 12:35:45,315 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 196 flow [2024-10-24 12:35:45,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:45,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:45,316 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] [2024-10-24 12:35:45,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:35:45,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 12:35:45,520 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:45,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1113471579, now seen corresponding path program 3 times [2024-10-24 12:35:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:45,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081949996] [2024-10-24 12:35:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:45,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081949996] [2024-10-24 12:35:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081949996] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317374293] [2024-10-24 12:35:45,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:35:45,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:45,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:45,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:35:45,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:35:45,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:45,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:35:45,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:45,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:45,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317374293] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:45,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:35:45,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-10-24 12:35:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797297163] [2024-10-24 12:35:45,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:45,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:35:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:35:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:35:45,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:45,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:45,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:45,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:45,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:46,089 INFO L124 PetriNetUnfolderBase]: 784/1167 cut-off events. [2024-10-24 12:35:46,090 INFO L125 PetriNetUnfolderBase]: For 2006/2006 co-relation queries the response was YES. [2024-10-24 12:35:46,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1167 events. 784/1167 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4395 event pairs, 319 based on Foata normal form. 14/1180 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-10-24 12:35:46,098 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-10-24 12:35:46,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 519 flow [2024-10-24 12:35:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:35:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:35:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-10-24 12:35:46,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-10-24 12:35:46,100 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 196 flow. Second operand 7 states and 82 transitions. [2024-10-24 12:35:46,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 519 flow [2024-10-24 12:35:46,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 478 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-24 12:35:46,108 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 293 flow [2024-10-24 12:35:46,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-10-24 12:35:46,109 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-10-24 12:35:46,109 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 293 flow [2024-10-24 12:35:46,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:46,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:46,109 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] [2024-10-24 12:35:46,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:46,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:46,311 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:46,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1921426485, now seen corresponding path program 4 times [2024-10-24 12:35:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068220981] [2024-10-24 12:35:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:46,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:46,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068220981] [2024-10-24 12:35:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068220981] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301999056] [2024-10-24 12:35:46,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:35:46,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:46,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:46,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:35:46,494 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:35:46,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:46,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:35:46,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:46,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301999056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:46,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:35:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020127239] [2024-10-24 12:35:46,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:46,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:35:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:35:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:35:46,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:46,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:46,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:46,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:46,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:47,227 INFO L124 PetriNetUnfolderBase]: 770/1153 cut-off events. [2024-10-24 12:35:47,228 INFO L125 PetriNetUnfolderBase]: For 3012/3012 co-relation queries the response was YES. [2024-10-24 12:35:47,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1153 events. 770/1153 cut-off events. For 3012/3012 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4521 event pairs, 143 based on Foata normal form. 14/1166 useless extension candidates. Maximal degree in co-relation 4412. Up to 385 conditions per place. [2024-10-24 12:35:47,236 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 92 selfloop transitions, 71 changer transitions 0/164 dead transitions. [2024-10-24 12:35:47,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 164 transitions, 1336 flow [2024-10-24 12:35:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 12:35:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-24 12:35:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 182 transitions. [2024-10-24 12:35:47,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37448559670781895 [2024-10-24 12:35:47,240 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 293 flow. Second operand 18 states and 182 transitions. [2024-10-24 12:35:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 164 transitions, 1336 flow [2024-10-24 12:35:47,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 164 transitions, 1216 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-24 12:35:47,251 INFO L231 Difference]: Finished difference. Result has 63 places, 99 transitions, 830 flow [2024-10-24 12:35:47,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=830, PETRI_PLACES=63, PETRI_TRANSITIONS=99} [2024-10-24 12:35:47,253 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-10-24 12:35:47,255 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 99 transitions, 830 flow [2024-10-24 12:35:47,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:47,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:47,255 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] [2024-10-24 12:35:47,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:35:47,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:47,460 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:47,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:47,461 INFO L85 PathProgramCache]: Analyzing trace with hash 910923729, now seen corresponding path program 5 times [2024-10-24 12:35:47,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263301817] [2024-10-24 12:35:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:47,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263301817] [2024-10-24 12:35:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263301817] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391780423] [2024-10-24 12:35:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:35:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:47,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:47,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:35:47,665 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:47,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:47,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:35:47,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:47,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:47,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391780423] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:47,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:35:47,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422065747] [2024-10-24 12:35:47,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:47,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:35:47,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:35:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:35:47,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:47,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 99 transitions, 830 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:47,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:47,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:47,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:48,400 INFO L124 PetriNetUnfolderBase]: 753/1118 cut-off events. [2024-10-24 12:35:48,400 INFO L125 PetriNetUnfolderBase]: For 3028/3028 co-relation queries the response was YES. [2024-10-24 12:35:48,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 1118 events. 753/1118 cut-off events. For 3028/3028 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4271 event pairs, 170 based on Foata normal form. 12/1130 useless extension candidates. Maximal degree in co-relation 4741. Up to 504 conditions per place. [2024-10-24 12:35:48,411 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 79 selfloop transitions, 75 changer transitions 0/155 dead transitions. [2024-10-24 12:35:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 155 transitions, 1379 flow [2024-10-24 12:35:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:35:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:35:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-10-24 12:35:48,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-10-24 12:35:48,414 INFO L175 Difference]: Start difference. First operand has 63 places, 99 transitions, 830 flow. Second operand 14 states and 143 transitions. [2024-10-24 12:35:48,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 155 transitions, 1379 flow [2024-10-24 12:35:48,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 155 transitions, 1244 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-10-24 12:35:48,431 INFO L231 Difference]: Finished difference. Result has 74 places, 117 transitions, 983 flow [2024-10-24 12:35:48,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=983, PETRI_PLACES=74, PETRI_TRANSITIONS=117} [2024-10-24 12:35:48,433 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-10-24 12:35:48,434 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 117 transitions, 983 flow [2024-10-24 12:35:48,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:48,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:48,435 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] [2024-10-24 12:35:48,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:35:48,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:48,636 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:48,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -193223073, now seen corresponding path program 6 times [2024-10-24 12:35:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612465639] [2024-10-24 12:35:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612465639] [2024-10-24 12:35:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612465639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:48,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220328589] [2024-10-24 12:35:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:35:48,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:48,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:35:48,842 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:35:48,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:48,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:35:48,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:48,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220328589] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:35:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-10-24 12:35:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75130342] [2024-10-24 12:35:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:49,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:35:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:35:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:35:49,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:49,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 117 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:49,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:49,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:49,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:49,246 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2024-10-24 12:35:49,247 INFO L125 PetriNetUnfolderBase]: For 3363/3363 co-relation queries the response was YES. [2024-10-24 12:35:49,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1083 events. 736/1083 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4011 event pairs, 191 based on Foata normal form. 12/1095 useless extension candidates. Maximal degree in co-relation 4796. Up to 619 conditions per place. [2024-10-24 12:35:49,256 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 50 changer transitions 0/133 dead transitions. [2024-10-24 12:35:49,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 1283 flow [2024-10-24 12:35:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:35:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:35:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-10-24 12:35:49,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-24 12:35:49,257 INFO L175 Difference]: Start difference. First operand has 74 places, 117 transitions, 983 flow. Second operand 7 states and 81 transitions. [2024-10-24 12:35:49,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 1283 flow [2024-10-24 12:35:49,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 133 transitions, 1200 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-10-24 12:35:49,271 INFO L231 Difference]: Finished difference. Result has 72 places, 113 transitions, 964 flow [2024-10-24 12:35:49,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=72, PETRI_TRANSITIONS=113} [2024-10-24 12:35:49,272 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-10-24 12:35:49,272 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 113 transitions, 964 flow [2024-10-24 12:35:49,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:49,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:49,273 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] [2024-10-24 12:35:49,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 12:35:49,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:49,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:49,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash -175012763, now seen corresponding path program 1 times [2024-10-24 12:35:49,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:49,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091812219] [2024-10-24 12:35:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091812219] [2024-10-24 12:35:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091812219] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393981988] [2024-10-24 12:35:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:49,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:49,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:35:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:49,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:35:49,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:49,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393981988] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:49,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:35:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-10-24 12:35:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819094213] [2024-10-24 12:35:49,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:49,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:35:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:35:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:35:49,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:49,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 113 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2024-10-24 12:35:49,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:49,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:49,888 INFO L124 PetriNetUnfolderBase]: 721/1053 cut-off events. [2024-10-24 12:35:49,888 INFO L125 PetriNetUnfolderBase]: For 3327/3327 co-relation queries the response was YES. [2024-10-24 12:35:49,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1053 events. 721/1053 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3815 event pairs, 200 based on Foata normal form. 70/1123 useless extension candidates. Maximal degree in co-relation 4539. Up to 816 conditions per place. [2024-10-24 12:35:49,897 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 122 selfloop transitions, 14 changer transitions 0/137 dead transitions. [2024-10-24 12:35:49,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1426 flow [2024-10-24 12:35:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:35:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:35:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-10-24 12:35:49,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-10-24 12:35:49,899 INFO L175 Difference]: Start difference. First operand has 72 places, 113 transitions, 964 flow. Second operand 5 states and 56 transitions. [2024-10-24 12:35:49,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1426 flow [2024-10-24 12:35:49,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1304 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-24 12:35:49,911 INFO L231 Difference]: Finished difference. Result has 71 places, 114 transitions, 922 flow [2024-10-24 12:35:49,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=71, PETRI_TRANSITIONS=114} [2024-10-24 12:35:49,911 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-10-24 12:35:49,912 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 114 transitions, 922 flow [2024-10-24 12:35:49,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2024-10-24 12:35:49,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:49,912 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] [2024-10-24 12:35:49,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:35:50,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:50,113 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:50,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1433195013, now seen corresponding path program 1 times [2024-10-24 12:35:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:50,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879764958] [2024-10-24 12:35:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:50,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879764958] [2024-10-24 12:35:50,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879764958] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:50,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467663750] [2024-10-24 12:35:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:50,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:50,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:50,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:35:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:50,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 12:35:50,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:50,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:35:50,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:35:50,941 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 19 treesize of output 15 [2024-10-24 12:35:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:51,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:51,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467663750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:51,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:51,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-10-24 12:35:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800835771] [2024-10-24 12:35:51,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:51,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 12:35:51,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 12:35:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-10-24 12:35:51,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:51,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 114 transitions, 922 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:51,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:51,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:51,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:52,526 INFO L124 PetriNetUnfolderBase]: 1614/2340 cut-off events. [2024-10-24 12:35:52,527 INFO L125 PetriNetUnfolderBase]: For 6161/6161 co-relation queries the response was YES. [2024-10-24 12:35:52,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10926 conditions, 2340 events. 1614/2340 cut-off events. For 6161/6161 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9912 event pairs, 91 based on Foata normal form. 1/2341 useless extension candidates. Maximal degree in co-relation 9118. Up to 1292 conditions per place. [2024-10-24 12:35:52,550 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 259 selfloop transitions, 234 changer transitions 1/495 dead transitions. [2024-10-24 12:35:52,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 495 transitions, 4909 flow [2024-10-24 12:35:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 12:35:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 12:35:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 280 transitions. [2024-10-24 12:35:52,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2024-10-24 12:35:52,552 INFO L175 Difference]: Start difference. First operand has 71 places, 114 transitions, 922 flow. Second operand 22 states and 280 transitions. [2024-10-24 12:35:52,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 495 transitions, 4909 flow [2024-10-24 12:35:52,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 495 transitions, 4866 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-24 12:35:52,593 INFO L231 Difference]: Finished difference. Result has 106 places, 318 transitions, 3643 flow [2024-10-24 12:35:52,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3643, PETRI_PLACES=106, PETRI_TRANSITIONS=318} [2024-10-24 12:35:52,594 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-10-24 12:35:52,595 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 318 transitions, 3643 flow [2024-10-24 12:35:52,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:52,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:52,595 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] [2024-10-24 12:35:52,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:52,796 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,SelfDestructingSolverStorable11 [2024-10-24 12:35:52,796 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:52,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1372818606, now seen corresponding path program 1 times [2024-10-24 12:35:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137235658] [2024-10-24 12:35:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:52,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137235658] [2024-10-24 12:35:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137235658] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173603381] [2024-10-24 12:35:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:53,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:53,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:53,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:35:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:53,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 12:35:53,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:53,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:35:53,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:35:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:53,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173603381] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:53,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-10-24 12:35:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527364287] [2024-10-24 12:35:53,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:53,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:35:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:35:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:35:53,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:53,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 318 transitions, 3643 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:54,335 INFO L124 PetriNetUnfolderBase]: 1893/2729 cut-off events. [2024-10-24 12:35:54,336 INFO L125 PetriNetUnfolderBase]: For 13384/13384 co-relation queries the response was YES. [2024-10-24 12:35:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15806 conditions, 2729 events. 1893/2729 cut-off events. For 13384/13384 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11740 event pairs, 138 based on Foata normal form. 1/2730 useless extension candidates. Maximal degree in co-relation 14578. Up to 1631 conditions per place. [2024-10-24 12:35:54,370 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 236 selfloop transitions, 214 changer transitions 1/452 dead transitions. [2024-10-24 12:35:54,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 452 transitions, 5905 flow [2024-10-24 12:35:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:35:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:35:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-10-24 12:35:54,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-10-24 12:35:54,371 INFO L175 Difference]: Start difference. First operand has 106 places, 318 transitions, 3643 flow. Second operand 9 states and 123 transitions. [2024-10-24 12:35:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 452 transitions, 5905 flow [2024-10-24 12:35:54,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 452 transitions, 5545 flow, removed 151 selfloop flow, removed 3 redundant places. [2024-10-24 12:35:54,477 INFO L231 Difference]: Finished difference. Result has 114 places, 368 transitions, 4509 flow [2024-10-24 12:35:54,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4509, PETRI_PLACES=114, PETRI_TRANSITIONS=368} [2024-10-24 12:35:54,478 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2024-10-24 12:35:54,478 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 368 transitions, 4509 flow [2024-10-24 12:35:54,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:54,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:54,478 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] [2024-10-24 12:35:54,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 12:35:54,679 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,SelfDestructingSolverStorable12 [2024-10-24 12:35:54,679 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:54,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1084980243, now seen corresponding path program 2 times [2024-10-24 12:35:54,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:54,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024922270] [2024-10-24 12:35:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:55,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024922270] [2024-10-24 12:35:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024922270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906264051] [2024-10-24 12:35:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:35:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:55,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:35:55,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:55,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:55,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 12:35:55,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:55,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:35:55,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:35:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:55,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906264051] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:55,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:55,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-10-24 12:35:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420597554] [2024-10-24 12:35:55,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:55,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 12:35:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 12:35:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-10-24 12:35:55,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:55,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 368 transitions, 4509 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:55,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:55,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:57,123 INFO L124 PetriNetUnfolderBase]: 2149/3099 cut-off events. [2024-10-24 12:35:57,123 INFO L125 PetriNetUnfolderBase]: For 17583/17583 co-relation queries the response was YES. [2024-10-24 12:35:57,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 3099 events. 2149/3099 cut-off events. For 17583/17583 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13716 event pairs, 197 based on Foata normal form. 2/3101 useless extension candidates. Maximal degree in co-relation 17988. Up to 2587 conditions per place. [2024-10-24 12:35:57,164 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 372 selfloop transitions, 165 changer transitions 2/540 dead transitions. [2024-10-24 12:35:57,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 540 transitions, 7190 flow [2024-10-24 12:35:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-24 12:35:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-24 12:35:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 263 transitions. [2024-10-24 12:35:57,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4058641975308642 [2024-10-24 12:35:57,167 INFO L175 Difference]: Start difference. First operand has 114 places, 368 transitions, 4509 flow. Second operand 24 states and 263 transitions. [2024-10-24 12:35:57,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 540 transitions, 7190 flow [2024-10-24 12:35:57,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 540 transitions, 6800 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-10-24 12:35:57,373 INFO L231 Difference]: Finished difference. Result has 143 places, 440 transitions, 5585 flow [2024-10-24 12:35:57,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5585, PETRI_PLACES=143, PETRI_TRANSITIONS=440} [2024-10-24 12:35:57,374 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-10-24 12:35:57,374 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 440 transitions, 5585 flow [2024-10-24 12:35:57,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:57,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:57,374 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] [2024-10-24 12:35:57,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 12:35:57,575 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,SelfDestructingSolverStorable13 [2024-10-24 12:35:57,575 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:57,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash 906925894, now seen corresponding path program 2 times [2024-10-24 12:35:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:57,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661545797] [2024-10-24 12:35:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661545797] [2024-10-24 12:35:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661545797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788878055] [2024-10-24 12:35:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:35:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:58,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:58,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:58,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:35:58,120 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:58,121 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:58,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 12:35:58,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:58,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:35:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:58,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:58,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:35:58,403 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 28 treesize of output 21 [2024-10-24 12:35:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788878055] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:58,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-10-24 12:35:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010831810] [2024-10-24 12:35:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:58,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:35:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:35:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:35:58,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:35:58,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 440 transitions, 5585 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:58,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:58,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:35:58,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:59,505 INFO L124 PetriNetUnfolderBase]: 2552/3650 cut-off events. [2024-10-24 12:35:59,506 INFO L125 PetriNetUnfolderBase]: For 22863/22863 co-relation queries the response was YES. [2024-10-24 12:35:59,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 3650 events. 2552/3650 cut-off events. For 22863/22863 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 16427 event pairs, 254 based on Foata normal form. 1/3651 useless extension candidates. Maximal degree in co-relation 23051. Up to 2972 conditions per place. [2024-10-24 12:35:59,552 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 395 selfloop transitions, 192 changer transitions 1/589 dead transitions. [2024-10-24 12:35:59,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 589 transitions, 8513 flow [2024-10-24 12:35:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:35:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:35:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-10-24 12:35:59,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-24 12:35:59,554 INFO L175 Difference]: Start difference. First operand has 143 places, 440 transitions, 5585 flow. Second operand 9 states and 117 transitions. [2024-10-24 12:35:59,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 589 transitions, 8513 flow [2024-10-24 12:35:59,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 589 transitions, 8237 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-10-24 12:35:59,757 INFO L231 Difference]: Finished difference. Result has 146 places, 520 transitions, 6996 flow [2024-10-24 12:35:59,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=146, PETRI_TRANSITIONS=520} [2024-10-24 12:35:59,758 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-10-24 12:35:59,758 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 520 transitions, 6996 flow [2024-10-24 12:35:59,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:59,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:59,758 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] [2024-10-24 12:35:59,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:59,962 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,SelfDestructingSolverStorable14 [2024-10-24 12:35:59,963 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:35:59,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash 488516362, now seen corresponding path program 3 times [2024-10-24 12:35:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:59,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146967227] [2024-10-24 12:35:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:59,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:00,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:00,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146967227] [2024-10-24 12:36:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146967227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423708459] [2024-10-24 12:36:00,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:00,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:00,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:00,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 12:36:00,447 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:36:00,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:00,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 12:36:00,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:00,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:00,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:00,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:00,692 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 28 treesize of output 21 [2024-10-24 12:36:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423708459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:01,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:01,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-10-24 12:36:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197619427] [2024-10-24 12:36:01,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:01,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:36:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:36:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:36:01,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:01,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 520 transitions, 6996 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:01,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:01,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:01,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:01,749 INFO L124 PetriNetUnfolderBase]: 2681/3837 cut-off events. [2024-10-24 12:36:01,750 INFO L125 PetriNetUnfolderBase]: For 27317/27317 co-relation queries the response was YES. [2024-10-24 12:36:01,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25619 conditions, 3837 events. 2681/3837 cut-off events. For 27317/27317 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17450 event pairs, 264 based on Foata normal form. 1/3838 useless extension candidates. Maximal degree in co-relation 25300. Up to 3332 conditions per place. [2024-10-24 12:36:01,784 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 435 selfloop transitions, 140 changer transitions 1/577 dead transitions. [2024-10-24 12:36:01,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 577 transitions, 8710 flow [2024-10-24 12:36:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-10-24 12:36:01,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2024-10-24 12:36:01,786 INFO L175 Difference]: Start difference. First operand has 146 places, 520 transitions, 6996 flow. Second operand 9 states and 115 transitions. [2024-10-24 12:36:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 577 transitions, 8710 flow [2024-10-24 12:36:02,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 577 transitions, 8463 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-10-24 12:36:02,027 INFO L231 Difference]: Finished difference. Result has 152 places, 527 transitions, 7154 flow [2024-10-24 12:36:02,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7154, PETRI_PLACES=152, PETRI_TRANSITIONS=527} [2024-10-24 12:36:02,027 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2024-10-24 12:36:02,028 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 527 transitions, 7154 flow [2024-10-24 12:36:02,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:02,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:02,028 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] [2024-10-24 12:36:02,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 12:36:02,228 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,SelfDestructingSolverStorable15 [2024-10-24 12:36:02,229 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:02,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash -462631155, now seen corresponding path program 3 times [2024-10-24 12:36:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:02,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321834950] [2024-10-24 12:36:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:02,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321834950] [2024-10-24 12:36:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321834950] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4776469] [2024-10-24 12:36:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:02,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:02,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 12:36:02,812 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:36:02,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:02,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 12:36:02,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:02,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:36:03,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:03,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4776469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:03,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-10-24 12:36:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889524812] [2024-10-24 12:36:03,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:03,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 12:36:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 12:36:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-10-24 12:36:03,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:03,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 527 transitions, 7154 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:03,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:03,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:03,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:04,547 INFO L124 PetriNetUnfolderBase]: 2848/4083 cut-off events. [2024-10-24 12:36:04,548 INFO L125 PetriNetUnfolderBase]: For 29650/29650 co-relation queries the response was YES. [2024-10-24 12:36:04,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27024 conditions, 4083 events. 2848/4083 cut-off events. For 29650/29650 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18916 event pairs, 314 based on Foata normal form. 1/4084 useless extension candidates. Maximal degree in co-relation 26700. Up to 3557 conditions per place. [2024-10-24 12:36:04,596 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 470 selfloop transitions, 169 changer transitions 1/641 dead transitions. [2024-10-24 12:36:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 641 transitions, 9505 flow [2024-10-24 12:36:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 12:36:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 12:36:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 247 transitions. [2024-10-24 12:36:04,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4158249158249158 [2024-10-24 12:36:04,598 INFO L175 Difference]: Start difference. First operand has 152 places, 527 transitions, 7154 flow. Second operand 22 states and 247 transitions. [2024-10-24 12:36:04,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 641 transitions, 9505 flow [2024-10-24 12:36:04,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 641 transitions, 9266 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:04,975 INFO L231 Difference]: Finished difference. Result has 171 places, 556 transitions, 7657 flow [2024-10-24 12:36:04,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7657, PETRI_PLACES=171, PETRI_TRANSITIONS=556} [2024-10-24 12:36:04,976 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2024-10-24 12:36:04,976 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 556 transitions, 7657 flow [2024-10-24 12:36:04,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:04,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:04,976 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] [2024-10-24 12:36:04,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:05,177 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,SelfDestructingSolverStorable16 [2024-10-24 12:36:05,177 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:05,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2090506375, now seen corresponding path program 4 times [2024-10-24 12:36:05,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:05,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92610794] [2024-10-24 12:36:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:05,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:05,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92610794] [2024-10-24 12:36:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92610794] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114165628] [2024-10-24 12:36:05,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:05,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:05,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 12:36:05,902 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:05,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:05,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 12:36:05,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:05,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:36:06,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:06,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:06,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-10-24 12:36:06,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:06,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-10-24 12:36:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:07,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114165628] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:07,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:07,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-24 12:36:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519451126] [2024-10-24 12:36:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:07,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 12:36:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 12:36:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-10-24 12:36:07,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:07,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 556 transitions, 7657 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:07,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:08,913 INFO L124 PetriNetUnfolderBase]: 3283/4678 cut-off events. [2024-10-24 12:36:08,913 INFO L125 PetriNetUnfolderBase]: For 35723/35723 co-relation queries the response was YES. [2024-10-24 12:36:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31302 conditions, 4678 events. 3283/4678 cut-off events. For 35723/35723 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21925 event pairs, 337 based on Foata normal form. 2/4680 useless extension candidates. Maximal degree in co-relation 30965. Up to 3695 conditions per place. [2024-10-24 12:36:09,045 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 496 selfloop transitions, 208 changer transitions 2/707 dead transitions. [2024-10-24 12:36:09,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 707 transitions, 10804 flow [2024-10-24 12:36:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 12:36:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 12:36:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 196 transitions. [2024-10-24 12:36:09,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4839506172839506 [2024-10-24 12:36:09,047 INFO L175 Difference]: Start difference. First operand has 171 places, 556 transitions, 7657 flow. Second operand 15 states and 196 transitions. [2024-10-24 12:36:09,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 707 transitions, 10804 flow [2024-10-24 12:36:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 707 transitions, 10518 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-10-24 12:36:09,422 INFO L231 Difference]: Finished difference. Result has 186 places, 614 transitions, 8847 flow [2024-10-24 12:36:09,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7398, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8847, PETRI_PLACES=186, PETRI_TRANSITIONS=614} [2024-10-24 12:36:09,423 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-10-24 12:36:09,423 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 614 transitions, 8847 flow [2024-10-24 12:36:09,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:09,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:09,424 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] [2024-10-24 12:36:09,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:09,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:09,625 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:09,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1013399012, now seen corresponding path program 4 times [2024-10-24 12:36:09,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:09,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079920023] [2024-10-24 12:36:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:10,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:10,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079920023] [2024-10-24 12:36:10,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079920023] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157035377] [2024-10-24 12:36:10,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:10,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:10,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:10,090 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:10,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 12:36:10,167 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:10,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:10,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 12:36:10,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:10,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:10,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:10,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:10,413 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 28 treesize of output 21 [2024-10-24 12:36:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:10,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157035377] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:10,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:10,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2024-10-24 12:36:10,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704137807] [2024-10-24 12:36:10,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:10,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:10,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:10,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:10,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 614 transitions, 8847 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:10,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:10,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:10,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:11,756 INFO L124 PetriNetUnfolderBase]: 3412/4865 cut-off events. [2024-10-24 12:36:11,756 INFO L125 PetriNetUnfolderBase]: For 43009/43009 co-relation queries the response was YES. [2024-10-24 12:36:11,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34449 conditions, 4865 events. 3412/4865 cut-off events. For 43009/43009 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23014 event pairs, 372 based on Foata normal form. 1/4866 useless extension candidates. Maximal degree in co-relation 34087. Up to 4344 conditions per place. [2024-10-24 12:36:11,801 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 505 selfloop transitions, 161 changer transitions 1/668 dead transitions. [2024-10-24 12:36:11,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 668 transitions, 10806 flow [2024-10-24 12:36:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-10-24 12:36:11,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2024-10-24 12:36:11,803 INFO L175 Difference]: Start difference. First operand has 186 places, 614 transitions, 8847 flow. Second operand 9 states and 112 transitions. [2024-10-24 12:36:11,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 668 transitions, 10806 flow [2024-10-24 12:36:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 668 transitions, 10397 flow, removed 178 selfloop flow, removed 3 redundant places. [2024-10-24 12:36:12,181 INFO L231 Difference]: Finished difference. Result has 193 places, 621 transitions, 8915 flow [2024-10-24 12:36:12,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8915, PETRI_PLACES=193, PETRI_TRANSITIONS=621} [2024-10-24 12:36:12,182 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2024-10-24 12:36:12,182 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 621 transitions, 8915 flow [2024-10-24 12:36:12,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:12,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:12,182 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] [2024-10-24 12:36:12,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 12:36:12,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:12,387 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:12,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1664739096, now seen corresponding path program 5 times [2024-10-24 12:36:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:12,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420584573] [2024-10-24 12:36:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:12,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420584573] [2024-10-24 12:36:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420584573] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822304892] [2024-10-24 12:36:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:12,756 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:12,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 12:36:12,830 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:12,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:12,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 12:36:12,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:12,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:13,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:13,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:13,086 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 24 treesize of output 21 [2024-10-24 12:36:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822304892] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:13,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:13,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2024-10-24 12:36:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364516759] [2024-10-24 12:36:13,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:13,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:13,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:13,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 621 transitions, 8915 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:13,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:13,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:13,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:14,407 INFO L124 PetriNetUnfolderBase]: 3579/5106 cut-off events. [2024-10-24 12:36:14,407 INFO L125 PetriNetUnfolderBase]: For 44842/44842 co-relation queries the response was YES. [2024-10-24 12:36:14,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35471 conditions, 5106 events. 3579/5106 cut-off events. For 44842/44842 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24410 event pairs, 331 based on Foata normal form. 1/5107 useless extension candidates. Maximal degree in co-relation 35109. Up to 4433 conditions per place. [2024-10-24 12:36:14,457 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 517 selfloop transitions, 162 changer transitions 1/681 dead transitions. [2024-10-24 12:36:14,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 681 transitions, 10989 flow [2024-10-24 12:36:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-10-24 12:36:14,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-10-24 12:36:14,459 INFO L175 Difference]: Start difference. First operand has 193 places, 621 transitions, 8915 flow. Second operand 9 states and 113 transitions. [2024-10-24 12:36:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 681 transitions, 10989 flow [2024-10-24 12:36:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 681 transitions, 10704 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:14,861 INFO L231 Difference]: Finished difference. Result has 199 places, 633 transitions, 9228 flow [2024-10-24 12:36:14,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9228, PETRI_PLACES=199, PETRI_TRANSITIONS=633} [2024-10-24 12:36:14,862 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2024-10-24 12:36:14,862 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 633 transitions, 9228 flow [2024-10-24 12:36:14,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:14,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:14,862 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] [2024-10-24 12:36:14,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:15,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:15,063 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:15,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -166591874, now seen corresponding path program 6 times [2024-10-24 12:36:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041854177] [2024-10-24 12:36:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:15,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:15,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041854177] [2024-10-24 12:36:15,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041854177] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768216619] [2024-10-24 12:36:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:15,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:15,540 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:15,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 12:36:15,618 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:36:15,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:15,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 12:36:15,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:15,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:15,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:15,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:15,830 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 28 treesize of output 21 [2024-10-24 12:36:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768216619] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:16,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-10-24 12:36:16,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333214012] [2024-10-24 12:36:16,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:16,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:36:16,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:36:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:36:16,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:16,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 633 transitions, 9228 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:16,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:16,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:17,116 INFO L124 PetriNetUnfolderBase]: 3670/5239 cut-off events. [2024-10-24 12:36:17,116 INFO L125 PetriNetUnfolderBase]: For 48706/48706 co-relation queries the response was YES. [2024-10-24 12:36:17,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36823 conditions, 5239 events. 3670/5239 cut-off events. For 48706/48706 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25171 event pairs, 465 based on Foata normal form. 1/5240 useless extension candidates. Maximal degree in co-relation 36455. Up to 4545 conditions per place. [2024-10-24 12:36:17,165 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 499 selfloop transitions, 214 changer transitions 1/715 dead transitions. [2024-10-24 12:36:17,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 715 transitions, 11685 flow [2024-10-24 12:36:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-10-24 12:36:17,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-10-24 12:36:17,166 INFO L175 Difference]: Start difference. First operand has 199 places, 633 transitions, 9228 flow. Second operand 9 states and 114 transitions. [2024-10-24 12:36:17,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 715 transitions, 11685 flow [2024-10-24 12:36:17,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 715 transitions, 11389 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-10-24 12:36:17,519 INFO L231 Difference]: Finished difference. Result has 205 places, 649 transitions, 9770 flow [2024-10-24 12:36:17,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9770, PETRI_PLACES=205, PETRI_TRANSITIONS=649} [2024-10-24 12:36:17,520 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2024-10-24 12:36:17,520 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 649 transitions, 9770 flow [2024-10-24 12:36:17,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:17,520 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] [2024-10-24 12:36:17,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 12:36:17,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:17,721 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:17,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2046509819, now seen corresponding path program 5 times [2024-10-24 12:36:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653926614] [2024-10-24 12:36:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653926614] [2024-10-24 12:36:18,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653926614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084895908] [2024-10-24 12:36:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:18,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:18,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 12:36:18,144 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:18,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:18,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 12:36:18,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:18,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:36:18,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:18,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:18,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-10-24 12:36:18,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:18,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-10-24 12:36:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084895908] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:19,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-24 12:36:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793322768] [2024-10-24 12:36:19,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:19,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 12:36:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 12:36:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-10-24 12:36:19,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:19,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 649 transitions, 9770 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:19,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:19,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:19,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:20,785 INFO L124 PetriNetUnfolderBase]: 3897/5570 cut-off events. [2024-10-24 12:36:20,785 INFO L125 PetriNetUnfolderBase]: For 55421/55421 co-relation queries the response was YES. [2024-10-24 12:36:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39658 conditions, 5570 events. 3897/5570 cut-off events. For 55421/55421 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 27057 event pairs, 482 based on Foata normal form. 2/5572 useless extension candidates. Maximal degree in co-relation 39284. Up to 4792 conditions per place. [2024-10-24 12:36:20,835 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 574 selfloop transitions, 176 changer transitions 2/753 dead transitions. [2024-10-24 12:36:20,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 753 transitions, 12506 flow [2024-10-24 12:36:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:36:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:36:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-10-24 12:36:20,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-10-24 12:36:20,838 INFO L175 Difference]: Start difference. First operand has 205 places, 649 transitions, 9770 flow. Second operand 14 states and 172 transitions. [2024-10-24 12:36:20,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 753 transitions, 12506 flow [2024-10-24 12:36:21,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 753 transitions, 11958 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-10-24 12:36:21,417 INFO L231 Difference]: Finished difference. Result has 216 places, 682 transitions, 10106 flow [2024-10-24 12:36:21,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9222, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10106, PETRI_PLACES=216, PETRI_TRANSITIONS=682} [2024-10-24 12:36:21,418 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-10-24 12:36:21,418 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 682 transitions, 10106 flow [2024-10-24 12:36:21,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:21,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:21,419 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] [2024-10-24 12:36:21,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 12:36:21,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:21,619 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:21,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1498972727, now seen corresponding path program 6 times [2024-10-24 12:36:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341682724] [2024-10-24 12:36:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341682724] [2024-10-24 12:36:22,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341682724] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990484245] [2024-10-24 12:36:22,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:22,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:22,054 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:22,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 12:36:22,133 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:36:22,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:22,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 12:36:22,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:22,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:36:22,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:36:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:22,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990484245] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:22,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:22,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-10-24 12:36:22,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736627513] [2024-10-24 12:36:22,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:22,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 12:36:22,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 12:36:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-10-24 12:36:22,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:22,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 682 transitions, 10106 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:22,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:22,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:22,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:24,249 INFO L124 PetriNetUnfolderBase]: 4134/5905 cut-off events. [2024-10-24 12:36:24,249 INFO L125 PetriNetUnfolderBase]: For 57767/57767 co-relation queries the response was YES. [2024-10-24 12:36:24,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41955 conditions, 5905 events. 4134/5905 cut-off events. For 57767/57767 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29019 event pairs, 438 based on Foata normal form. 1/5906 useless extension candidates. Maximal degree in co-relation 41571. Up to 5172 conditions per place. [2024-10-24 12:36:24,310 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 585 selfloop transitions, 217 changer transitions 2/805 dead transitions. [2024-10-24 12:36:24,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 805 transitions, 12998 flow [2024-10-24 12:36:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 12:36:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-24 12:36:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 318 transitions. [2024-10-24 12:36:24,312 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-10-24 12:36:24,312 INFO L175 Difference]: Start difference. First operand has 216 places, 682 transitions, 10106 flow. Second operand 30 states and 318 transitions. [2024-10-24 12:36:24,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 805 transitions, 12998 flow [2024-10-24 12:36:24,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 805 transitions, 12691 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:24,961 INFO L231 Difference]: Finished difference. Result has 247 places, 708 transitions, 10753 flow [2024-10-24 12:36:24,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9844, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10753, PETRI_PLACES=247, PETRI_TRANSITIONS=708} [2024-10-24 12:36:24,962 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-10-24 12:36:24,963 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 708 transitions, 10753 flow [2024-10-24 12:36:24,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:24,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:24,963 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:24,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:25,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:25,164 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:25,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash 549068580, now seen corresponding path program 7 times [2024-10-24 12:36:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:25,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015667221] [2024-10-24 12:36:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015667221] [2024-10-24 12:36:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015667221] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093301461] [2024-10-24 12:36:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:36:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:25,282 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) [2024-10-24 12:36:25,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 12:36:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:25,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:25,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:25,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093301461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:25,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-10-24 12:36:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989637938] [2024-10-24 12:36:25,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:25,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:36:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:36:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:36:25,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:25,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 708 transitions, 10753 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:25,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:25,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:25,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:26,888 INFO L124 PetriNetUnfolderBase]: 4851/6947 cut-off events. [2024-10-24 12:36:26,888 INFO L125 PetriNetUnfolderBase]: For 84500/84500 co-relation queries the response was YES. [2024-10-24 12:36:26,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50080 conditions, 6947 events. 4851/6947 cut-off events. For 84500/84500 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35332 event pairs, 1272 based on Foata normal form. 242/7189 useless extension candidates. Maximal degree in co-relation 49630. Up to 4721 conditions per place. [2024-10-24 12:36:26,954 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 759 selfloop transitions, 62 changer transitions 0/822 dead transitions. [2024-10-24 12:36:26,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 822 transitions, 13766 flow [2024-10-24 12:36:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:36:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:36:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-10-24 12:36:26,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-10-24 12:36:26,955 INFO L175 Difference]: Start difference. First operand has 247 places, 708 transitions, 10753 flow. Second operand 8 states and 101 transitions. [2024-10-24 12:36:26,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 822 transitions, 13766 flow [2024-10-24 12:36:27,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 822 transitions, 13296 flow, removed 124 selfloop flow, removed 11 redundant places. [2024-10-24 12:36:27,677 INFO L231 Difference]: Finished difference. Result has 245 places, 679 transitions, 10181 flow [2024-10-24 12:36:27,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9641, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10181, PETRI_PLACES=245, PETRI_TRANSITIONS=679} [2024-10-24 12:36:27,678 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2024-10-24 12:36:27,679 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 679 transitions, 10181 flow [2024-10-24 12:36:27,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:27,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:27,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:27,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-24 12:36:27,879 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,SelfDestructingSolverStorable23 [2024-10-24 12:36:27,880 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:27,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash -432103725, now seen corresponding path program 8 times [2024-10-24 12:36:27,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:27,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958518137] [2024-10-24 12:36:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:27,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:27,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958518137] [2024-10-24 12:36:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958518137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:27,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46619051] [2024-10-24 12:36:27,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:27,970 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) [2024-10-24 12:36:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 12:36:28,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:28,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:28,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:28,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:28,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:28,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46619051] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:28,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:28,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-24 12:36:28,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98101142] [2024-10-24 12:36:28,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:28,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:36:28,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:36:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:36:28,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:28,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 679 transitions, 10181 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:28,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:28,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:28,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:29,568 INFO L124 PetriNetUnfolderBase]: 4264/6259 cut-off events. [2024-10-24 12:36:29,569 INFO L125 PetriNetUnfolderBase]: For 80601/80601 co-relation queries the response was YES. [2024-10-24 12:36:29,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45331 conditions, 6259 events. 4264/6259 cut-off events. For 80601/80601 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33060 event pairs, 1034 based on Foata normal form. 356/6615 useless extension candidates. Maximal degree in co-relation 44892. Up to 2220 conditions per place. [2024-10-24 12:36:29,625 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 684 selfloop transitions, 73 changer transitions 0/758 dead transitions. [2024-10-24 12:36:29,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 758 transitions, 12454 flow [2024-10-24 12:36:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:36:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:36:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-10-24 12:36:29,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-10-24 12:36:29,626 INFO L175 Difference]: Start difference. First operand has 245 places, 679 transitions, 10181 flow. Second operand 7 states and 95 transitions. [2024-10-24 12:36:29,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 758 transitions, 12454 flow [2024-10-24 12:36:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 758 transitions, 12389 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:30,137 INFO L231 Difference]: Finished difference. Result has 247 places, 647 transitions, 9936 flow [2024-10-24 12:36:30,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9936, PETRI_PLACES=247, PETRI_TRANSITIONS=647} [2024-10-24 12:36:30,139 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-10-24 12:36:30,139 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 647 transitions, 9936 flow [2024-10-24 12:36:30,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:30,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:30,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:30,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-24 12:36:30,339 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,SelfDestructingSolverStorable24 [2024-10-24 12:36:30,340 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:30,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1449287287, now seen corresponding path program 7 times [2024-10-24 12:36:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:30,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351507122] [2024-10-24 12:36:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351507122] [2024-10-24 12:36:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351507122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494281684] [2024-10-24 12:36:30,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:36:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:30,440 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) [2024-10-24 12:36:30,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 12:36:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:30,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:30,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:30,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494281684] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:30,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:30,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-24 12:36:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388756360] [2024-10-24 12:36:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:30,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:36:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:36:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:36:30,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:30,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 647 transitions, 9936 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:30,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:30,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:30,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:32,142 INFO L124 PetriNetUnfolderBase]: 3949/5868 cut-off events. [2024-10-24 12:36:32,142 INFO L125 PetriNetUnfolderBase]: For 73446/73446 co-relation queries the response was YES. [2024-10-24 12:36:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43567 conditions, 5868 events. 3949/5868 cut-off events. For 73446/73446 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31576 event pairs, 987 based on Foata normal form. 164/6032 useless extension candidates. Maximal degree in co-relation 43146. Up to 2220 conditions per place. [2024-10-24 12:36:32,195 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 570 selfloop transitions, 136 changer transitions 72/779 dead transitions. [2024-10-24 12:36:32,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 779 transitions, 12944 flow [2024-10-24 12:36:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:36:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:36:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-10-24 12:36:32,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-10-24 12:36:32,196 INFO L175 Difference]: Start difference. First operand has 247 places, 647 transitions, 9936 flow. Second operand 7 states and 94 transitions. [2024-10-24 12:36:32,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 779 transitions, 12944 flow [2024-10-24 12:36:32,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 779 transitions, 12663 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-10-24 12:36:32,734 INFO L231 Difference]: Finished difference. Result has 250 places, 597 transitions, 9510 flow [2024-10-24 12:36:32,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9670, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9510, PETRI_PLACES=250, PETRI_TRANSITIONS=597} [2024-10-24 12:36:32,734 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2024-10-24 12:36:32,734 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 597 transitions, 9510 flow [2024-10-24 12:36:32,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:32,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:32,735 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, 1] [2024-10-24 12:36:32,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:32,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-24 12:36:32,935 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:32,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:32,936 INFO L85 PathProgramCache]: Analyzing trace with hash 634867988, now seen corresponding path program 1 times [2024-10-24 12:36:32,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:32,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415580122] [2024-10-24 12:36:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:33,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415580122] [2024-10-24 12:36:33,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415580122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621788925] [2024-10-24 12:36:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:33,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:33,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 12:36:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:33,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:33,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:33,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:33,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621788925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:33,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:33,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:36:33,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275613764] [2024-10-24 12:36:33,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:33,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:36:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:33,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:36:33,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:36:33,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:33,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 597 transitions, 9510 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:33,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:33,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:33,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:34,627 INFO L124 PetriNetUnfolderBase]: 3869/5798 cut-off events. [2024-10-24 12:36:34,627 INFO L125 PetriNetUnfolderBase]: For 78687/78687 co-relation queries the response was YES. [2024-10-24 12:36:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43965 conditions, 5798 events. 3869/5798 cut-off events. For 78687/78687 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31644 event pairs, 863 based on Foata normal form. 82/5880 useless extension candidates. Maximal degree in co-relation 43551. Up to 2220 conditions per place. [2024-10-24 12:36:34,681 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 573 selfloop transitions, 127 changer transitions 43/744 dead transitions. [2024-10-24 12:36:34,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 744 transitions, 12510 flow [2024-10-24 12:36:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:36:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:36:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-10-24 12:36:34,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-10-24 12:36:34,682 INFO L175 Difference]: Start difference. First operand has 250 places, 597 transitions, 9510 flow. Second operand 10 states and 134 transitions. [2024-10-24 12:36:34,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 744 transitions, 12510 flow [2024-10-24 12:36:35,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 744 transitions, 12475 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-10-24 12:36:35,242 INFO L231 Difference]: Finished difference. Result has 260 places, 587 transitions, 9684 flow [2024-10-24 12:36:35,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9684, PETRI_PLACES=260, PETRI_TRANSITIONS=587} [2024-10-24 12:36:35,243 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2024-10-24 12:36:35,243 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 587 transitions, 9684 flow [2024-10-24 12:36:35,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:35,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:35,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:35,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-24 12:36:35,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:35,444 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:35,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash -799816665, now seen corresponding path program 9 times [2024-10-24 12:36:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744235455] [2024-10-24 12:36:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:35,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:35,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744235455] [2024-10-24 12:36:35,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744235455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:35,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150088742] [2024-10-24 12:36:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:35,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:35,660 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:35,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 12:36:35,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:36:35,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:35,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:35,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:35,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:35,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150088742] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:35,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-24 12:36:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239926571] [2024-10-24 12:36:35,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:35,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:36:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:36:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:36:35,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:35,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 587 transitions, 9684 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:35,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:35,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:35,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:36,685 INFO L124 PetriNetUnfolderBase]: 2743/4178 cut-off events. [2024-10-24 12:36:36,685 INFO L125 PetriNetUnfolderBase]: For 68083/68083 co-relation queries the response was YES. [2024-10-24 12:36:36,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 4178 events. 2743/4178 cut-off events. For 68083/68083 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21889 event pairs, 749 based on Foata normal form. 160/4338 useless extension candidates. Maximal degree in co-relation 33836. Up to 2220 conditions per place. [2024-10-24 12:36:36,724 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 425 selfloop transitions, 79 changer transitions 92/597 dead transitions. [2024-10-24 12:36:36,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 597 transitions, 10926 flow [2024-10-24 12:36:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:36:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:36:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-24 12:36:36,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-10-24 12:36:36,725 INFO L175 Difference]: Start difference. First operand has 260 places, 587 transitions, 9684 flow. Second operand 7 states and 92 transitions. [2024-10-24 12:36:36,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 597 transitions, 10926 flow [2024-10-24 12:36:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 597 transitions, 10445 flow, removed 73 selfloop flow, removed 12 redundant places. [2024-10-24 12:36:37,121 INFO L231 Difference]: Finished difference. Result has 246 places, 473 transitions, 7639 flow [2024-10-24 12:36:37,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8699, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7639, PETRI_PLACES=246, PETRI_TRANSITIONS=473} [2024-10-24 12:36:37,122 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2024-10-24 12:36:37,122 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 473 transitions, 7639 flow [2024-10-24 12:36:37,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:37,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:37,123 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, 1] [2024-10-24 12:36:37,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:37,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 12:36:37,326 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:37,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1270728760, now seen corresponding path program 2 times [2024-10-24 12:36:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738206735] [2024-10-24 12:36:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:37,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:37,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738206735] [2024-10-24 12:36:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738206735] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:37,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800724482] [2024-10-24 12:36:37,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:37,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:37,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:37,422 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:37,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 12:36:37,508 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:37,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:37,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:37,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:37,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:37,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800724482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:37,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:37,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-24 12:36:37,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725777410] [2024-10-24 12:36:37,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:37,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:37,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:37,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:37,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 473 transitions, 7639 flow. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:37,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:37,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:37,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:38,535 INFO L124 PetriNetUnfolderBase]: 2428/3706 cut-off events. [2024-10-24 12:36:38,535 INFO L125 PetriNetUnfolderBase]: For 51365/51365 co-relation queries the response was YES. [2024-10-24 12:36:38,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28639 conditions, 3706 events. 2428/3706 cut-off events. For 51365/51365 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 19155 event pairs, 663 based on Foata normal form. 82/3788 useless extension candidates. Maximal degree in co-relation 28545. Up to 2220 conditions per place. [2024-10-24 12:36:38,583 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 463 selfloop transitions, 99 changer transitions 26/589 dead transitions. [2024-10-24 12:36:38,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 589 transitions, 10117 flow [2024-10-24 12:36:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:36:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:36:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-10-24 12:36:38,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-10-24 12:36:38,585 INFO L175 Difference]: Start difference. First operand has 246 places, 473 transitions, 7639 flow. Second operand 10 states and 125 transitions. [2024-10-24 12:36:38,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 589 transitions, 10117 flow [2024-10-24 12:36:38,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 589 transitions, 9761 flow, removed 125 selfloop flow, removed 10 redundant places. [2024-10-24 12:36:38,962 INFO L231 Difference]: Finished difference. Result has 236 places, 486 transitions, 7772 flow [2024-10-24 12:36:38,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7402, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7772, PETRI_PLACES=236, PETRI_TRANSITIONS=486} [2024-10-24 12:36:38,963 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-10-24 12:36:38,963 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 486 transitions, 7772 flow [2024-10-24 12:36:38,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:38,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:38,964 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, 1] [2024-10-24 12:36:38,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:39,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-24 12:36:39,164 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:39,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash -532697314, now seen corresponding path program 3 times [2024-10-24 12:36:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635070921] [2024-10-24 12:36:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635070921] [2024-10-24 12:36:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635070921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874864514] [2024-10-24 12:36:39,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:39,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:39,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:39,281 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:39,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-24 12:36:39,370 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 12:36:39,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:39,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:39,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:39,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874864514] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:39,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-24 12:36:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114319770] [2024-10-24 12:36:39,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:39,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:36:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:36:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:36:39,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:39,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 486 transitions, 7772 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:39,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:39,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:39,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:40,273 INFO L124 PetriNetUnfolderBase]: 2275/3490 cut-off events. [2024-10-24 12:36:40,273 INFO L125 PetriNetUnfolderBase]: For 50775/50775 co-relation queries the response was YES. [2024-10-24 12:36:40,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27176 conditions, 3490 events. 2275/3490 cut-off events. For 50775/50775 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17948 event pairs, 668 based on Foata normal form. 79/3569 useless extension candidates. Maximal degree in co-relation 27086. Up to 2220 conditions per place. [2024-10-24 12:36:40,307 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 418 selfloop transitions, 61 changer transitions 61/541 dead transitions. [2024-10-24 12:36:40,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 541 transitions, 9235 flow [2024-10-24 12:36:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:36:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:36:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-10-24 12:36:40,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-24 12:36:40,308 INFO L175 Difference]: Start difference. First operand has 236 places, 486 transitions, 7772 flow. Second operand 10 states and 120 transitions. [2024-10-24 12:36:40,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 541 transitions, 9235 flow [2024-10-24 12:36:40,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 541 transitions, 8965 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-10-24 12:36:40,641 INFO L231 Difference]: Finished difference. Result has 235 places, 426 transitions, 6530 flow [2024-10-24 12:36:40,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6530, PETRI_PLACES=235, PETRI_TRANSITIONS=426} [2024-10-24 12:36:40,642 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 206 predicate places. [2024-10-24 12:36:40,642 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 426 transitions, 6530 flow [2024-10-24 12:36:40,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:40,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:40,643 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, 1] [2024-10-24 12:36:40,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:40,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:40,844 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:40,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1088375026, now seen corresponding path program 4 times [2024-10-24 12:36:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:40,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701272484] [2024-10-24 12:36:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701272484] [2024-10-24 12:36:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701272484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99348573] [2024-10-24 12:36:40,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:40,938 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:40,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-24 12:36:41,011 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:41,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:41,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 12:36:41,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:41,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:41,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99348573] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:41,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:41,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-10-24 12:36:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510560703] [2024-10-24 12:36:41,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:41,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:36:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:36:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:36:41,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:41,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 426 transitions, 6530 flow. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:41,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:41,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:41,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:42,501 INFO L124 PetriNetUnfolderBase]: 2617/3909 cut-off events. [2024-10-24 12:36:42,501 INFO L125 PetriNetUnfolderBase]: For 57751/57751 co-relation queries the response was YES. [2024-10-24 12:36:42,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30510 conditions, 3909 events. 2617/3909 cut-off events. For 57751/57751 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 19815 event pairs, 250 based on Foata normal form. 79/3988 useless extension candidates. Maximal degree in co-relation 30422. Up to 1101 conditions per place. [2024-10-24 12:36:42,541 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 409 selfloop transitions, 288 changer transitions 65/763 dead transitions. [2024-10-24 12:36:42,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 763 transitions, 12043 flow [2024-10-24 12:36:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-24 12:36:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-10-24 12:36:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 500 transitions. [2024-10-24 12:36:42,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3561253561253561 [2024-10-24 12:36:42,543 INFO L175 Difference]: Start difference. First operand has 235 places, 426 transitions, 6530 flow. Second operand 52 states and 500 transitions. [2024-10-24 12:36:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 763 transitions, 12043 flow [2024-10-24 12:36:42,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 763 transitions, 11653 flow, removed 93 selfloop flow, removed 11 redundant places. [2024-10-24 12:36:42,900 INFO L231 Difference]: Finished difference. Result has 291 places, 539 transitions, 8864 flow [2024-10-24 12:36:42,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=8864, PETRI_PLACES=291, PETRI_TRANSITIONS=539} [2024-10-24 12:36:42,901 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-10-24 12:36:42,901 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 539 transitions, 8864 flow [2024-10-24 12:36:42,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:42,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:42,901 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, 1] [2024-10-24 12:36:42,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:43,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:43,102 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:43,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -510134992, now seen corresponding path program 5 times [2024-10-24 12:36:43,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:43,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134170257] [2024-10-24 12:36:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134170257] [2024-10-24 12:36:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134170257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021078325] [2024-10-24 12:36:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:43,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:43,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-24 12:36:43,279 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:43,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:43,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:43,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:43,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:43,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021078325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:43,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:43,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-24 12:36:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292927649] [2024-10-24 12:36:43,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:43,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:43,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:43,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 539 transitions, 8864 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:43,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:43,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:43,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:44,091 INFO L124 PetriNetUnfolderBase]: 2323/3457 cut-off events. [2024-10-24 12:36:44,091 INFO L125 PetriNetUnfolderBase]: For 64215/64215 co-relation queries the response was YES. [2024-10-24 12:36:44,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30074 conditions, 3457 events. 2323/3457 cut-off events. For 64215/64215 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 16877 event pairs, 659 based on Foata normal form. 98/3555 useless extension candidates. Maximal degree in co-relation 29967. Up to 2748 conditions per place. [2024-10-24 12:36:44,131 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 478 selfloop transitions, 55 changer transitions 30/564 dead transitions. [2024-10-24 12:36:44,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 564 transitions, 10114 flow [2024-10-24 12:36:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-10-24 12:36:44,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-10-24 12:36:44,133 INFO L175 Difference]: Start difference. First operand has 291 places, 539 transitions, 8864 flow. Second operand 9 states and 107 transitions. [2024-10-24 12:36:44,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 564 transitions, 10114 flow [2024-10-24 12:36:44,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 564 transitions, 9058 flow, removed 346 selfloop flow, removed 24 redundant places. [2024-10-24 12:36:44,643 INFO L231 Difference]: Finished difference. Result has 266 places, 510 transitions, 7492 flow [2024-10-24 12:36:44,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7631, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7492, PETRI_PLACES=266, PETRI_TRANSITIONS=510} [2024-10-24 12:36:44,644 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 237 predicate places. [2024-10-24 12:36:44,644 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 510 transitions, 7492 flow [2024-10-24 12:36:44,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:44,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:44,645 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, 1] [2024-10-24 12:36:44,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:44,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:44,845 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:44,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 948173126, now seen corresponding path program 6 times [2024-10-24 12:36:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:44,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984957502] [2024-10-24 12:36:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:44,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:44,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984957502] [2024-10-24 12:36:44,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984957502] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:44,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972386961] [2024-10-24 12:36:44,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:44,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:44,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:44,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:44,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-24 12:36:45,019 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-24 12:36:45,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:45,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:36:45,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:45,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972386961] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:45,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:45,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-24 12:36:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681837123] [2024-10-24 12:36:45,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:45,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:36:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:36:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:36:45,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:45,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 510 transitions, 7492 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:45,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:45,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:45,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:45,822 INFO L124 PetriNetUnfolderBase]: 2075/3054 cut-off events. [2024-10-24 12:36:45,823 INFO L125 PetriNetUnfolderBase]: For 51022/51022 co-relation queries the response was YES. [2024-10-24 12:36:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 3054 events. 2075/3054 cut-off events. For 51022/51022 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14151 event pairs, 626 based on Foata normal form. 79/3133 useless extension candidates. Maximal degree in co-relation 25571. Up to 2748 conditions per place. [2024-10-24 12:36:45,861 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 384 selfloop transitions, 3 changer transitions 82/470 dead transitions. [2024-10-24 12:36:45,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 470 transitions, 7735 flow [2024-10-24 12:36:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:36:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:36:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-10-24 12:36:45,862 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3991769547325103 [2024-10-24 12:36:45,862 INFO L175 Difference]: Start difference. First operand has 266 places, 510 transitions, 7492 flow. Second operand 9 states and 97 transitions. [2024-10-24 12:36:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 470 transitions, 7735 flow [2024-10-24 12:36:46,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 470 transitions, 7532 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-10-24 12:36:46,156 INFO L231 Difference]: Finished difference. Result has 257 places, 388 transitions, 5662 flow [2024-10-24 12:36:46,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=257, PETRI_TRANSITIONS=388} [2024-10-24 12:36:46,157 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-10-24 12:36:46,157 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 388 transitions, 5662 flow [2024-10-24 12:36:46,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:46,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:46,157 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:46,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-24 12:36:46,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:46,358 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:46,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1419626082, now seen corresponding path program 10 times [2024-10-24 12:36:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:46,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768493143] [2024-10-24 12:36:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:46,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768493143] [2024-10-24 12:36:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768493143] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426745630] [2024-10-24 12:36:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:46,474 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:46,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-24 12:36:46,541 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:46,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:46,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:46,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:46,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:46,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426745630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:46,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-24 12:36:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068978832] [2024-10-24 12:36:46,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:46,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:36:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:36:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:36:46,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 388 transitions, 5662 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:47,614 INFO L124 PetriNetUnfolderBase]: 1948/2771 cut-off events. [2024-10-24 12:36:47,614 INFO L125 PetriNetUnfolderBase]: For 43372/43372 co-relation queries the response was YES. [2024-10-24 12:36:47,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 2771 events. 1948/2771 cut-off events. For 43372/43372 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11873 event pairs, 154 based on Foata normal form. 28/2799 useless extension candidates. Maximal degree in co-relation 23225. Up to 986 conditions per place. [2024-10-24 12:36:47,646 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 281 selfloop transitions, 219 changer transitions 0/501 dead transitions. [2024-10-24 12:36:47,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 501 transitions, 7949 flow [2024-10-24 12:36:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:36:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:36:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2024-10-24 12:36:47,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2024-10-24 12:36:47,647 INFO L175 Difference]: Start difference. First operand has 257 places, 388 transitions, 5662 flow. Second operand 20 states and 209 transitions. [2024-10-24 12:36:47,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 501 transitions, 7949 flow [2024-10-24 12:36:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 501 transitions, 7508 flow, removed 157 selfloop flow, removed 24 redundant places. [2024-10-24 12:36:47,847 INFO L231 Difference]: Finished difference. Result has 207 places, 404 transitions, 6117 flow [2024-10-24 12:36:47,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6117, PETRI_PLACES=207, PETRI_TRANSITIONS=404} [2024-10-24 12:36:47,847 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-10-24 12:36:47,847 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 404 transitions, 6117 flow [2024-10-24 12:36:47,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:47,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:47,848 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:47,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-24 12:36:48,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-24 12:36:48,048 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:48,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1282815831, now seen corresponding path program 8 times [2024-10-24 12:36:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:48,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99734790] [2024-10-24 12:36:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:48,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99734790] [2024-10-24 12:36:48,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99734790] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459664272] [2024-10-24 12:36:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:48,163 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:48,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-24 12:36:48,239 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:48,240 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:48,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:36:48,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:48,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:48,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459664272] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:48,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:48,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-24 12:36:48,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583930739] [2024-10-24 12:36:48,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:48,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 12:36:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 12:36:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-10-24 12:36:48,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:48,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 404 transitions, 6117 flow. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:48,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:48,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:48,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:49,159 INFO L124 PetriNetUnfolderBase]: 2534/3602 cut-off events. [2024-10-24 12:36:49,160 INFO L125 PetriNetUnfolderBase]: For 52426/52426 co-relation queries the response was YES. [2024-10-24 12:36:49,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29620 conditions, 3602 events. 2534/3602 cut-off events. For 52426/52426 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16310 event pairs, 323 based on Foata normal form. 54/3656 useless extension candidates. Maximal degree in co-relation 29541. Up to 1962 conditions per place. [2024-10-24 12:36:49,194 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 444 selfloop transitions, 253 changer transitions 0/698 dead transitions. [2024-10-24 12:36:49,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 698 transitions, 11277 flow [2024-10-24 12:36:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 12:36:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 12:36:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-10-24 12:36:49,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4123456790123457 [2024-10-24 12:36:49,196 INFO L175 Difference]: Start difference. First operand has 207 places, 404 transitions, 6117 flow. Second operand 15 states and 167 transitions. [2024-10-24 12:36:49,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 698 transitions, 11277 flow [2024-10-24 12:36:49,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 698 transitions, 10850 flow, removed 114 selfloop flow, removed 9 redundant places. [2024-10-24 12:36:49,453 INFO L231 Difference]: Finished difference. Result has 217 places, 499 transitions, 7917 flow [2024-10-24 12:36:49,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7917, PETRI_PLACES=217, PETRI_TRANSITIONS=499} [2024-10-24 12:36:49,454 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-10-24 12:36:49,454 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 499 transitions, 7917 flow [2024-10-24 12:36:49,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:49,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:49,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:49,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:49,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:49,655 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:49,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash -731354923, now seen corresponding path program 9 times [2024-10-24 12:36:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:49,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364222163] [2024-10-24 12:36:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364222163] [2024-10-24 12:36:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364222163] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473735416] [2024-10-24 12:36:49,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:49,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:49,735 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:49,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-24 12:36:49,808 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:36:49,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:49,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:36:49,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:49,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:49,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473735416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:49,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:49,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-24 12:36:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584259720] [2024-10-24 12:36:49,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:49,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:36:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:36:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:36:49,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:49,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 499 transitions, 7917 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:49,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:49,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:49,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:50,749 INFO L124 PetriNetUnfolderBase]: 2639/3795 cut-off events. [2024-10-24 12:36:50,749 INFO L125 PetriNetUnfolderBase]: For 63336/63336 co-relation queries the response was YES. [2024-10-24 12:36:50,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32887 conditions, 3795 events. 2639/3795 cut-off events. For 63336/63336 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 17673 event pairs, 217 based on Foata normal form. 30/3825 useless extension candidates. Maximal degree in co-relation 32805. Up to 1295 conditions per place. [2024-10-24 12:36:50,796 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 451 selfloop transitions, 207 changer transitions 0/659 dead transitions. [2024-10-24 12:36:50,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 659 transitions, 11422 flow [2024-10-24 12:36:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:36:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:36:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-10-24 12:36:50,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-10-24 12:36:50,797 INFO L175 Difference]: Start difference. First operand has 217 places, 499 transitions, 7917 flow. Second operand 10 states and 109 transitions. [2024-10-24 12:36:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 659 transitions, 11422 flow [2024-10-24 12:36:51,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 659 transitions, 10958 flow, removed 209 selfloop flow, removed 5 redundant places. [2024-10-24 12:36:51,244 INFO L231 Difference]: Finished difference. Result has 223 places, 512 transitions, 8260 flow [2024-10-24 12:36:51,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7453, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8260, PETRI_PLACES=223, PETRI_TRANSITIONS=512} [2024-10-24 12:36:51,245 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2024-10-24 12:36:51,245 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 512 transitions, 8260 flow [2024-10-24 12:36:51,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:51,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:51,246 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:51,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:51,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:51,447 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:51,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1409569305, now seen corresponding path program 10 times [2024-10-24 12:36:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726267216] [2024-10-24 12:36:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:51,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726267216] [2024-10-24 12:36:51,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726267216] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604582304] [2024-10-24 12:36:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:51,562 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:51,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-24 12:36:51,633 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:51,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:51,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:51,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:51,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604582304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:51,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-10-24 12:36:51,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879099783] [2024-10-24 12:36:51,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:51,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:51,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:51,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:51,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 512 transitions, 8260 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:51,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:51,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:51,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:52,701 INFO L124 PetriNetUnfolderBase]: 2676/3857 cut-off events. [2024-10-24 12:36:52,702 INFO L125 PetriNetUnfolderBase]: For 64084/64084 co-relation queries the response was YES. [2024-10-24 12:36:52,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33003 conditions, 3857 events. 2676/3857 cut-off events. For 64084/64084 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 17993 event pairs, 161 based on Foata normal form. 25/3882 useless extension candidates. Maximal degree in co-relation 32919. Up to 1207 conditions per place. [2024-10-24 12:36:52,744 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 378 selfloop transitions, 305 changer transitions 0/684 dead transitions. [2024-10-24 12:36:52,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 684 transitions, 11658 flow [2024-10-24 12:36:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:36:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:36:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 196 transitions. [2024-10-24 12:36:52,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-10-24 12:36:52,746 INFO L175 Difference]: Start difference. First operand has 223 places, 512 transitions, 8260 flow. Second operand 20 states and 196 transitions. [2024-10-24 12:36:52,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 684 transitions, 11658 flow [2024-10-24 12:36:53,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 684 transitions, 11174 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-10-24 12:36:53,119 INFO L231 Difference]: Finished difference. Result has 238 places, 555 transitions, 9222 flow [2024-10-24 12:36:53,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7868, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9222, PETRI_PLACES=238, PETRI_TRANSITIONS=555} [2024-10-24 12:36:53,119 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-10-24 12:36:53,120 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 555 transitions, 9222 flow [2024-10-24 12:36:53,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:53,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:53,120 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:53,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:53,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-24 12:36:53,321 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:53,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1458763499, now seen corresponding path program 11 times [2024-10-24 12:36:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379160429] [2024-10-24 12:36:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:53,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:53,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379160429] [2024-10-24 12:36:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379160429] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:53,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435242159] [2024-10-24 12:36:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:53,456 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:53,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-24 12:36:53,550 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:53,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:53,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:53,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:53,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:53,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435242159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:53,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:53,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-24 12:36:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593553426] [2024-10-24 12:36:53,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:53,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:36:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:36:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:36:53,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:53,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 555 transitions, 9222 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:53,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:53,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:53,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:55,156 INFO L124 PetriNetUnfolderBase]: 2854/4158 cut-off events. [2024-10-24 12:36:55,156 INFO L125 PetriNetUnfolderBase]: For 75376/75376 co-relation queries the response was YES. [2024-10-24 12:36:55,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36689 conditions, 4158 events. 2854/4158 cut-off events. For 75376/75376 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 20100 event pairs, 167 based on Foata normal form. 52/4210 useless extension candidates. Maximal degree in co-relation 36602. Up to 1207 conditions per place. [2024-10-24 12:36:55,211 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 404 selfloop transitions, 457 changer transitions 0/862 dead transitions. [2024-10-24 12:36:55,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 862 transitions, 14900 flow [2024-10-24 12:36:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-24 12:36:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-24 12:36:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 374 transitions. [2024-10-24 12:36:55,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3645224171539961 [2024-10-24 12:36:55,212 INFO L175 Difference]: Start difference. First operand has 238 places, 555 transitions, 9222 flow. Second operand 38 states and 374 transitions. [2024-10-24 12:36:55,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 862 transitions, 14900 flow [2024-10-24 12:36:55,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 862 transitions, 14632 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-10-24 12:36:55,620 INFO L231 Difference]: Finished difference. Result has 279 places, 678 transitions, 12412 flow [2024-10-24 12:36:55,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9006, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12412, PETRI_PLACES=279, PETRI_TRANSITIONS=678} [2024-10-24 12:36:55,621 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2024-10-24 12:36:55,621 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 678 transitions, 12412 flow [2024-10-24 12:36:55,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:55,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:55,621 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:55,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-24 12:36:55,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-24 12:36:55,822 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:36:55,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 851042482, now seen corresponding path program 11 times [2024-10-24 12:36:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488623542] [2024-10-24 12:36:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:55,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:55,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488623542] [2024-10-24 12:36:55,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488623542] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629300128] [2024-10-24 12:36:55,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:55,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:55,922 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-24 12:36:55,995 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:55,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:55,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:55,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:56,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629300128] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:56,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:56,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-24 12:36:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169457808] [2024-10-24 12:36:56,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:56,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 12:36:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 12:36:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-24 12:36:56,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-24 12:36:56,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 678 transitions, 12412 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:56,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:56,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-24 12:36:56,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:58,148 INFO L124 PetriNetUnfolderBase]: 4029/5807 cut-off events. [2024-10-24 12:36:58,148 INFO L125 PetriNetUnfolderBase]: For 138056/138056 co-relation queries the response was YES. [2024-10-24 12:36:58,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56724 conditions, 5807 events. 4029/5807 cut-off events. For 138056/138056 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29031 event pairs, 143 based on Foata normal form. 59/5866 useless extension candidates. Maximal degree in co-relation 56626. Up to 1885 conditions per place. [2024-10-24 12:36:58,242 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 482 selfloop transitions, 619 changer transitions 0/1102 dead transitions. [2024-10-24 12:36:58,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1102 transitions, 20904 flow [2024-10-24 12:36:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-24 12:36:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-24 12:36:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 457 transitions. [2024-10-24 12:36:58,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3846801346801347 [2024-10-24 12:36:58,244 INFO L175 Difference]: Start difference. First operand has 279 places, 678 transitions, 12412 flow. Second operand 44 states and 457 transitions. [2024-10-24 12:36:58,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1102 transitions, 20904 flow [2024-10-24 12:36:59,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1102 transitions, 19639 flow, removed 463 selfloop flow, removed 10 redundant places.