./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-array-int-trans.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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:36:18,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:36:18,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:36:18,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:36:18,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:36:18,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:36:18,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:36:18,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:36:18,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:36:18,605 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:36:18,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:36:18,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:36:18,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:36:18,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:36:18,607 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:36:18,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:36:18,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:36:18,608 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:36:18,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:36:18,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:36:18,610 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2025-03-17 06:36:18,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:36:18,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:36:18,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:36:18,865 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:36:18,865 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:36:18,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2025-03-17 06:36:20,110 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c313ab/c3c753ead87442f887827c71e3942fb1/FLAGeac669a66 [2025-03-17 06:36:20,368 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:36:20,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2025-03-17 06:36:20,384 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c313ab/c3c753ead87442f887827c71e3942fb1/FLAGeac669a66 [2025-03-17 06:36:20,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c313ab/c3c753ead87442f887827c71e3942fb1 [2025-03-17 06:36:20,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:36:20,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:36:20,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:36:20,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:36:20,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:36:20,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a19a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20, skipping insertion in model container [2025-03-17 06:36:20,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,716 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:36:20,847 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2767,2780] [2025-03-17 06:36:20,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:36:20,873 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:36:20,901 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2767,2780] [2025-03-17 06:36:20,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:36:20,925 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:36:20,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20 WrapperNode [2025-03-17 06:36:20,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:36:20,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:36:20,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:36:20,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:36:20,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,977 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 252 [2025-03-17 06:36:20,978 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:36:20,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:36:20,979 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:36:20,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:36:20,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:20,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,011 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 06:36:21,012 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,022 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:36:21,033 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:36:21,033 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:36:21,033 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:36:21,034 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (1/1) ... [2025-03-17 06:36:21,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:36:21,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:21,067 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) [2025-03-17 06:36:21,074 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 [2025-03-17 06:36:21,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:36:21,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:36:21,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:36:21,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:36:21,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:36:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:36:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:36:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:36:21,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:36:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:36:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:36:21,098 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:36:21,188 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:36:21,190 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:36:21,527 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:36:21,528 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:36:21,771 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:36:21,772 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:36:21,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:36:21 BoogieIcfgContainer [2025-03-17 06:36:21,772 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:36:21,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:36:21,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:36:21,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:36:21,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:36:20" (1/3) ... [2025-03-17 06:36:21,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d8aac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:36:21, skipping insertion in model container [2025-03-17 06:36:21,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:20" (2/3) ... [2025-03-17 06:36:21,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d8aac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:36:21, skipping insertion in model container [2025-03-17 06:36:21,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:36:21" (3/3) ... [2025-03-17 06:36:21,780 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2025-03-17 06:36:21,796 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:36:21,797 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-trans.wvr.c that has 4 procedures, 32 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-17 06:36:21,797 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:36:21,845 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:36:21,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:36:21,898 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2025-03-17 06:36:21,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:36:21,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-03-17 06:36:21,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:36:21,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2025-03-17 06:36:21,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:36:21,918 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;@16c6476e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:36:21,918 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:36:21,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:36:21,927 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2025-03-17 06:36:21,927 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:36:21,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:21,927 INFO L206 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, 1] [2025-03-17 06:36:21,928 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)] === [2025-03-17 06:36:21,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 520578959, now seen corresponding path program 1 times [2025-03-17 06:36:21,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:21,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355306089] [2025-03-17 06:36:21,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:21,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:22,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:36:22,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:36:22,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:22,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355306089] [2025-03-17 06:36:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355306089] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:22,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:36:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300335345] [2025-03-17 06:36:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:22,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:22,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:22,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:22,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:22,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:22,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:22,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:22,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:23,187 INFO L124 PetriNetUnfolderBase]: 2310/3311 cut-off events. [2025-03-17 06:36:23,188 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2025-03-17 06:36:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6710 conditions, 3311 events. 2310/3311 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15792 event pairs, 350 based on Foata normal form. 1/2822 useless extension candidates. Maximal degree in co-relation 4116. Up to 1121 conditions per place. [2025-03-17 06:36:23,215 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 111 selfloop transitions, 13 changer transitions 2/130 dead transitions. [2025-03-17 06:36:23,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 130 transitions, 587 flow [2025-03-17 06:36:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2025-03-17 06:36:23,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2025-03-17 06:36:23,230 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 9 states and 190 transitions. [2025-03-17 06:36:23,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 130 transitions, 587 flow [2025-03-17 06:36:23,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 130 transitions, 537 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:23,248 INFO L231 Difference]: Finished difference. Result has 42 places, 49 transitions, 156 flow [2025-03-17 06:36:23,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=49} [2025-03-17 06:36:23,253 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2025-03-17 06:36:23,255 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 49 transitions, 156 flow [2025-03-17 06:36:23,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:23,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:23,256 INFO L206 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, 1] [2025-03-17 06:36:23,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:36:23,257 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)] === [2025-03-17 06:36:23,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash 287155497, now seen corresponding path program 2 times [2025-03-17 06:36:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130222122] [2025-03-17 06:36:23,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:23,282 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:36:23,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:36:23,300 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:23,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:23,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130222122] [2025-03-17 06:36:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130222122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:36:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046124881] [2025-03-17 06:36:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:23,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:23,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:23,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:23,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:23,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:23,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 49 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:23,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:23,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:23,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:24,199 INFO L124 PetriNetUnfolderBase]: 2503/3645 cut-off events. [2025-03-17 06:36:24,199 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2025-03-17 06:36:24,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 3645 events. 2503/3645 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18275 event pairs, 295 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 5326. Up to 1093 conditions per place. [2025-03-17 06:36:24,215 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 15 changer transitions 2/130 dead transitions. [2025-03-17 06:36:24,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 130 transitions, 600 flow [2025-03-17 06:36:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2025-03-17 06:36:24,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2025-03-17 06:36:24,217 INFO L175 Difference]: Start difference. First operand has 42 places, 49 transitions, 156 flow. Second operand 9 states and 188 transitions. [2025-03-17 06:36:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 130 transitions, 600 flow [2025-03-17 06:36:24,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 130 transitions, 598 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 06:36:24,220 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 218 flow [2025-03-17 06:36:24,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2025-03-17 06:36:24,220 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2025-03-17 06:36:24,220 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 218 flow [2025-03-17 06:36:24,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:24,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:24,221 INFO L206 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, 1, 1] [2025-03-17 06:36:24,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:36:24,221 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)] === [2025-03-17 06:36:24,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash -614959717, now seen corresponding path program 1 times [2025-03-17 06:36:24,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162727158] [2025-03-17 06:36:24,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:24,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:36:24,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:36:24,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:24,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:24,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162727158] [2025-03-17 06:36:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162727158] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:24,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79103243] [2025-03-17 06:36:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:24,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:24,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:24,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:24,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:24,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:24,720 INFO L124 PetriNetUnfolderBase]: 3513/5282 cut-off events. [2025-03-17 06:36:24,720 INFO L125 PetriNetUnfolderBase]: For 2742/2742 co-relation queries the response was YES. [2025-03-17 06:36:24,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 5282 events. 3513/5282 cut-off events. For 2742/2742 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29497 event pairs, 1592 based on Foata normal form. 188/5203 useless extension candidates. Maximal degree in co-relation 7948. Up to 3220 conditions per place. [2025-03-17 06:36:24,743 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 87 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2025-03-17 06:36:24,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 571 flow [2025-03-17 06:36:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2025-03-17 06:36:24,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-17 06:36:24,745 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 218 flow. Second operand 5 states and 106 transitions. [2025-03-17 06:36:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 571 flow [2025-03-17 06:36:24,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 100 transitions, 554 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:24,754 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 288 flow [2025-03-17 06:36:24,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2025-03-17 06:36:24,755 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2025-03-17 06:36:24,756 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 288 flow [2025-03-17 06:36:24,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:24,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:24,756 INFO L206 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, 1, 1] [2025-03-17 06:36:24,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:36:24,756 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)] === [2025-03-17 06:36:24,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1026689445, now seen corresponding path program 1 times [2025-03-17 06:36:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989131469] [2025-03-17 06:36:24,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:24,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:36:24,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:36:24,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:24,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:24,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989131469] [2025-03-17 06:36:24,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989131469] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:24,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341380185] [2025-03-17 06:36:24,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:24,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:24,963 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) [2025-03-17 06:36:24,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:36:25,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:36:25,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:36:25,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:25,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:25,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:36:25,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:25,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:25,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341380185] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:25,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:25,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2025-03-17 06:36:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341942408] [2025-03-17 06:36:25,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:25,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:25,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:25,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:36:25,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:25,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:25,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:25,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:25,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:25,879 INFO L124 PetriNetUnfolderBase]: 3630/5387 cut-off events. [2025-03-17 06:36:25,879 INFO L125 PetriNetUnfolderBase]: For 4110/4110 co-relation queries the response was YES. [2025-03-17 06:36:25,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13032 conditions, 5387 events. 3630/5387 cut-off events. For 4110/4110 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29376 event pairs, 2097 based on Foata normal form. 1/5102 useless extension candidates. Maximal degree in co-relation 8812. Up to 3225 conditions per place. [2025-03-17 06:36:25,898 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 8 changer transitions 2/122 dead transitions. [2025-03-17 06:36:25,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 122 transitions, 711 flow [2025-03-17 06:36:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2025-03-17 06:36:25,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2025-03-17 06:36:25,903 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 288 flow. Second operand 7 states and 149 transitions. [2025-03-17 06:36:25,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 122 transitions, 711 flow [2025-03-17 06:36:25,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 122 transitions, 703 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 06:36:25,907 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 329 flow [2025-03-17 06:36:25,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2025-03-17 06:36:25,907 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2025-03-17 06:36:25,907 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 329 flow [2025-03-17 06:36:25,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:25,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:25,908 INFO L206 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, 1, 1] [2025-03-17 06:36:25,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:36:26,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:26,109 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)] === [2025-03-17 06:36:26,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash -724291509, now seen corresponding path program 1 times [2025-03-17 06:36:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578739301] [2025-03-17 06:36:26,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:26,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:36:26,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:36:26,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:26,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:26,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578739301] [2025-03-17 06:36:26,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578739301] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:26,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:26,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:36:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505653468] [2025-03-17 06:36:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:26,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:26,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:26,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:26,207 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:26,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:26,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:26,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:26,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:26,521 INFO L124 PetriNetUnfolderBase]: 2435/3732 cut-off events. [2025-03-17 06:36:26,521 INFO L125 PetriNetUnfolderBase]: For 2909/2909 co-relation queries the response was YES. [2025-03-17 06:36:26,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 3732 events. 2435/3732 cut-off events. For 2909/2909 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20369 event pairs, 1147 based on Foata normal form. 172/3895 useless extension candidates. Maximal degree in co-relation 7933. Up to 1871 conditions per place. [2025-03-17 06:36:26,539 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 81 selfloop transitions, 6 changer transitions 3/94 dead transitions. [2025-03-17 06:36:26,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 570 flow [2025-03-17 06:36:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2025-03-17 06:36:26,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.555 [2025-03-17 06:36:26,541 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 329 flow. Second operand 5 states and 111 transitions. [2025-03-17 06:36:26,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 570 flow [2025-03-17 06:36:26,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 561 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:26,547 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 268 flow [2025-03-17 06:36:26,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2025-03-17 06:36:26,549 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2025-03-17 06:36:26,549 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 268 flow [2025-03-17 06:36:26,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:26,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:26,549 INFO L206 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, 1, 1, 1] [2025-03-17 06:36:26,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:36:26,549 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)] === [2025-03-17 06:36:26,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1277002033, now seen corresponding path program 1 times [2025-03-17 06:36:26,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:26,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525889149] [2025-03-17 06:36:26,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:26,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:26,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:36:26,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:36:26,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:26,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525889149] [2025-03-17 06:36:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525889149] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:26,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:26,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:26,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915250425] [2025-03-17 06:36:26,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:26,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:36:26,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:26,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:36:26,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:36:26,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:26,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:26,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:26,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:26,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:27,557 INFO L124 PetriNetUnfolderBase]: 6415/9640 cut-off events. [2025-03-17 06:36:27,558 INFO L125 PetriNetUnfolderBase]: For 7271/7271 co-relation queries the response was YES. [2025-03-17 06:36:27,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 9640 events. 6415/9640 cut-off events. For 7271/7271 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 60203 event pairs, 1937 based on Foata normal form. 4/9635 useless extension candidates. Maximal degree in co-relation 20787. Up to 2894 conditions per place. [2025-03-17 06:36:27,600 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 33 changer transitions 9/186 dead transitions. [2025-03-17 06:36:27,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 186 transitions, 1189 flow [2025-03-17 06:36:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2025-03-17 06:36:27,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 06:36:27,601 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 268 flow. Second operand 9 states and 195 transitions. [2025-03-17 06:36:27,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 186 transitions, 1189 flow [2025-03-17 06:36:27,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 186 transitions, 1166 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:27,616 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 618 flow [2025-03-17 06:36:27,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=618, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2025-03-17 06:36:27,617 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2025-03-17 06:36:27,617 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 618 flow [2025-03-17 06:36:27,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:27,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:27,618 INFO L206 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, 1, 1, 1] [2025-03-17 06:36:27,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:36:27,618 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)] === [2025-03-17 06:36:27,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1471821673, now seen corresponding path program 2 times [2025-03-17 06:36:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482974060] [2025-03-17 06:36:27,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:27,627 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:36:27,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 26 statements. [2025-03-17 06:36:27,634 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:27,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:27,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:27,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482974060] [2025-03-17 06:36:27,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482974060] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672146927] [2025-03-17 06:36:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:27,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:36:27,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:27,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:36:27,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:36:27,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:27,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 618 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:27,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:27,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:27,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:28,971 INFO L124 PetriNetUnfolderBase]: 9343/14086 cut-off events. [2025-03-17 06:36:28,972 INFO L125 PetriNetUnfolderBase]: For 16490/16490 co-relation queries the response was YES. [2025-03-17 06:36:29,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38875 conditions, 14086 events. 9343/14086 cut-off events. For 16490/16490 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 93548 event pairs, 1821 based on Foata normal form. 4/14080 useless extension candidates. Maximal degree in co-relation 35939. Up to 3055 conditions per place. [2025-03-17 06:36:29,068 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 196 selfloop transitions, 32 changer transitions 14/246 dead transitions. [2025-03-17 06:36:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 246 transitions, 2012 flow [2025-03-17 06:36:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2025-03-17 06:36:29,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2025-03-17 06:36:29,073 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 618 flow. Second operand 10 states and 216 transitions. [2025-03-17 06:36:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 246 transitions, 2012 flow [2025-03-17 06:36:29,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 246 transitions, 2010 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 06:36:29,149 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 981 flow [2025-03-17 06:36:29,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=981, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2025-03-17 06:36:29,150 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2025-03-17 06:36:29,151 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 981 flow [2025-03-17 06:36:29,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:29,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:29,151 INFO L206 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, 1, 1, 1] [2025-03-17 06:36:29,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:36:29,152 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)] === [2025-03-17 06:36:29,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1863144143, now seen corresponding path program 1 times [2025-03-17 06:36:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107450656] [2025-03-17 06:36:29,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:29,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:36:29,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:36:29,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:29,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:29,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:29,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107450656] [2025-03-17 06:36:29,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107450656] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:29,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:29,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:36:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3766204] [2025-03-17 06:36:29,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:29,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:29,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:29,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:29,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:30,219 INFO L124 PetriNetUnfolderBase]: 8878/13243 cut-off events. [2025-03-17 06:36:30,220 INFO L125 PetriNetUnfolderBase]: For 27003/27003 co-relation queries the response was YES. [2025-03-17 06:36:30,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40650 conditions, 13243 events. 8878/13243 cut-off events. For 27003/27003 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 85955 event pairs, 4486 based on Foata normal form. 4/13184 useless extension candidates. Maximal degree in co-relation 37316. Up to 6646 conditions per place. [2025-03-17 06:36:30,268 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 93 selfloop transitions, 4 changer transitions 66/167 dead transitions. [2025-03-17 06:36:30,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 167 transitions, 1674 flow [2025-03-17 06:36:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-03-17 06:36:30,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-03-17 06:36:30,270 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 981 flow. Second operand 5 states and 110 transitions. [2025-03-17 06:36:30,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 167 transitions, 1674 flow [2025-03-17 06:36:30,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 167 transitions, 1647 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:30,328 INFO L231 Difference]: Finished difference. Result has 94 places, 71 transitions, 545 flow [2025-03-17 06:36:30,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=94, PETRI_TRANSITIONS=71} [2025-03-17 06:36:30,329 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2025-03-17 06:36:30,329 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 71 transitions, 545 flow [2025-03-17 06:36:30,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:30,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:30,329 INFO L206 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, 1, 1, 1] [2025-03-17 06:36:30,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:36:30,329 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)] === [2025-03-17 06:36:30,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1024181645, now seen corresponding path program 3 times [2025-03-17 06:36:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:30,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719209272] [2025-03-17 06:36:30,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:30,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:36:30,344 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 26 statements. [2025-03-17 06:36:30,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:30,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719209272] [2025-03-17 06:36:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719209272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696502929] [2025-03-17 06:36:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:30,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:36:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:30,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:36:30,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:36:30,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:30,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 71 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:30,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:30,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:30,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:31,158 INFO L124 PetriNetUnfolderBase]: 5507/8129 cut-off events. [2025-03-17 06:36:31,158 INFO L125 PetriNetUnfolderBase]: For 14334/14334 co-relation queries the response was YES. [2025-03-17 06:36:31,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24265 conditions, 8129 events. 5507/8129 cut-off events. For 14334/14334 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47074 event pairs, 1690 based on Foata normal form. 4/8123 useless extension candidates. Maximal degree in co-relation 24234. Up to 2250 conditions per place. [2025-03-17 06:36:31,195 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 19 changer transitions 16/170 dead transitions. [2025-03-17 06:36:31,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 170 transitions, 1349 flow [2025-03-17 06:36:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2025-03-17 06:36:31,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-03-17 06:36:31,197 INFO L175 Difference]: Start difference. First operand has 94 places, 71 transitions, 545 flow. Second operand 9 states and 198 transitions. [2025-03-17 06:36:31,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 170 transitions, 1349 flow [2025-03-17 06:36:31,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 170 transitions, 1222 flow, removed 38 selfloop flow, removed 11 redundant places. [2025-03-17 06:36:31,256 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 566 flow [2025-03-17 06:36:31,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=566, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2025-03-17 06:36:31,257 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2025-03-17 06:36:31,257 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 566 flow [2025-03-17 06:36:31,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:31,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:31,257 INFO L206 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, 1, 1, 1] [2025-03-17 06:36:31,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:36:31,257 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)] === [2025-03-17 06:36:31,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1815407171, now seen corresponding path program 1 times [2025-03-17 06:36:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597195921] [2025-03-17 06:36:31,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:31,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:36:31,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:36:31,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:31,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597195921] [2025-03-17 06:36:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597195921] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156058401] [2025-03-17 06:36:31,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:31,397 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) [2025-03-17 06:36:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:36:31,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:36:31,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:36:31,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:31,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:31,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:36:31,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:31,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156058401] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:31,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-17 06:36:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467376598] [2025-03-17 06:36:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:31,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:36:31,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:31,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:36:31,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:36:31,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:31,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 566 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:31,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:31,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:32,373 INFO L124 PetriNetUnfolderBase]: 4707/6838 cut-off events. [2025-03-17 06:36:32,373 INFO L125 PetriNetUnfolderBase]: For 12150/12150 co-relation queries the response was YES. [2025-03-17 06:36:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19964 conditions, 6838 events. 4707/6838 cut-off events. For 12150/12150 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37322 event pairs, 1878 based on Foata normal form. 2/6835 useless extension candidates. Maximal degree in co-relation 19935. Up to 3579 conditions per place. [2025-03-17 06:36:32,419 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 108 selfloop transitions, 18 changer transitions 3/133 dead transitions. [2025-03-17 06:36:32,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1062 flow [2025-03-17 06:36:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-03-17 06:36:32,421 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2025-03-17 06:36:32,421 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 566 flow. Second operand 7 states and 143 transitions. [2025-03-17 06:36:32,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1062 flow [2025-03-17 06:36:32,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 133 transitions, 1005 flow, removed 25 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:32,460 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 563 flow [2025-03-17 06:36:32,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2025-03-17 06:36:32,460 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2025-03-17 06:36:32,460 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 563 flow [2025-03-17 06:36:32,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:32,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:32,461 INFO L206 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, 1, 1, 1, 1] [2025-03-17 06:36:32,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:32,665 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,SelfDestructingSolverStorable9 [2025-03-17 06:36:32,665 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)] === [2025-03-17 06:36:32,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1120155075, now seen corresponding path program 1 times [2025-03-17 06:36:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834099433] [2025-03-17 06:36:32,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:32,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:36:32,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:36:32,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:32,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:32,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834099433] [2025-03-17 06:36:32,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834099433] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448989103] [2025-03-17 06:36:32,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:32,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:32,813 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) [2025-03-17 06:36:32,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:36:32,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:36:32,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:36:32,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:32,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:32,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:36:32,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:32,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:33,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448989103] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:33,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:33,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 06:36:33,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726188180] [2025-03-17 06:36:33,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:33,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:36:33,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:33,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:36:33,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:36:33,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:33,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 563 flow. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:33,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:33,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:33,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:34,369 INFO L124 PetriNetUnfolderBase]: 9611/13911 cut-off events. [2025-03-17 06:36:34,369 INFO L125 PetriNetUnfolderBase]: For 23118/23118 co-relation queries the response was YES. [2025-03-17 06:36:34,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40985 conditions, 13911 events. 9611/13911 cut-off events. For 23118/23118 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 85017 event pairs, 3748 based on Foata normal form. 2/13847 useless extension candidates. Maximal degree in co-relation 40955. Up to 5596 conditions per place. [2025-03-17 06:36:34,427 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 17 changer transitions 4/255 dead transitions. [2025-03-17 06:36:34,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 255 transitions, 2329 flow [2025-03-17 06:36:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 06:36:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 06:36:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2025-03-17 06:36:34,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45576923076923076 [2025-03-17 06:36:34,428 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 563 flow. Second operand 13 states and 237 transitions. [2025-03-17 06:36:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 255 transitions, 2329 flow [2025-03-17 06:36:34,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 255 transitions, 2154 flow, removed 17 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:34,516 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 663 flow [2025-03-17 06:36:34,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=663, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2025-03-17 06:36:34,517 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2025-03-17 06:36:34,517 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 663 flow [2025-03-17 06:36:34,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:34,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:34,517 INFO L206 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, 1, 1, 1, 1] [2025-03-17 06:36:34,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:34,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:34,718 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)] === [2025-03-17 06:36:34,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1254505515, now seen corresponding path program 1 times [2025-03-17 06:36:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372467897] [2025-03-17 06:36:34,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:34,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:36:34,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:36:34,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:34,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372467897] [2025-03-17 06:36:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372467897] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:34,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591055905] [2025-03-17 06:36:34,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:34,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:34,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:34,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:34,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:34,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 663 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:34,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:34,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:34,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:35,438 INFO L124 PetriNetUnfolderBase]: 6039/9284 cut-off events. [2025-03-17 06:36:35,438 INFO L125 PetriNetUnfolderBase]: For 13740/13740 co-relation queries the response was YES. [2025-03-17 06:36:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26351 conditions, 9284 events. 6039/9284 cut-off events. For 13740/13740 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 59802 event pairs, 2518 based on Foata normal form. 544/9797 useless extension candidates. Maximal degree in co-relation 26319. Up to 4164 conditions per place. [2025-03-17 06:36:35,487 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 47 selfloop transitions, 4 changer transitions 59/114 dead transitions. [2025-03-17 06:36:35,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 114 transitions, 910 flow [2025-03-17 06:36:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2025-03-17 06:36:35,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2025-03-17 06:36:35,489 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 663 flow. Second operand 6 states and 115 transitions. [2025-03-17 06:36:35,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 114 transitions, 910 flow [2025-03-17 06:36:35,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 114 transitions, 869 flow, removed 10 selfloop flow, removed 5 redundant places. [2025-03-17 06:36:35,536 INFO L231 Difference]: Finished difference. Result has 99 places, 55 transitions, 285 flow [2025-03-17 06:36:35,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=99, PETRI_TRANSITIONS=55} [2025-03-17 06:36:35,538 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2025-03-17 06:36:35,538 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 55 transitions, 285 flow [2025-03-17 06:36:35,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:35,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:35,538 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:35,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 06:36:35,539 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)] === [2025-03-17 06:36:35,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -698760867, now seen corresponding path program 2 times [2025-03-17 06:36:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:35,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504799013] [2025-03-17 06:36:35,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:35,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:36:35,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-17 06:36:35,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:35,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504799013] [2025-03-17 06:36:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504799013] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:35,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:35,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084139929] [2025-03-17 06:36:35,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:35,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:35,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:35,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:35,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:35,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:35,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 55 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:35,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:35,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:35,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:36,085 INFO L124 PetriNetUnfolderBase]: 5064/7684 cut-off events. [2025-03-17 06:36:36,085 INFO L125 PetriNetUnfolderBase]: For 8603/8603 co-relation queries the response was YES. [2025-03-17 06:36:36,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20541 conditions, 7684 events. 5064/7684 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47099 event pairs, 842 based on Foata normal form. 1/7407 useless extension candidates. Maximal degree in co-relation 20510. Up to 2424 conditions per place. [2025-03-17 06:36:36,120 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 100 selfloop transitions, 25 changer transitions 1/130 dead transitions. [2025-03-17 06:36:36,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 854 flow [2025-03-17 06:36:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2025-03-17 06:36:36,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2025-03-17 06:36:36,123 INFO L175 Difference]: Start difference. First operand has 99 places, 55 transitions, 285 flow. Second operand 6 states and 139 transitions. [2025-03-17 06:36:36,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 854 flow [2025-03-17 06:36:36,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 130 transitions, 751 flow, removed 41 selfloop flow, removed 13 redundant places. [2025-03-17 06:36:36,173 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 450 flow [2025-03-17 06:36:36,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2025-03-17 06:36:36,174 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2025-03-17 06:36:36,174 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 450 flow [2025-03-17 06:36:36,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:36,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:36,174 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:36,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:36:36,175 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)] === [2025-03-17 06:36:36,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:36,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1433998621, now seen corresponding path program 3 times [2025-03-17 06:36:36,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:36,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212988236] [2025-03-17 06:36:36,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:36,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:36:36,184 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-17 06:36:36,184 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:36,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:36,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212988236] [2025-03-17 06:36:36,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212988236] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:36,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:36,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991931026] [2025-03-17 06:36:36,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:36,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:36,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:36,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:36,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:36,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:36,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:36,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:36,908 INFO L124 PetriNetUnfolderBase]: 6924/10374 cut-off events. [2025-03-17 06:36:36,909 INFO L125 PetriNetUnfolderBase]: For 13347/13347 co-relation queries the response was YES. [2025-03-17 06:36:36,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28569 conditions, 10374 events. 6924/10374 cut-off events. For 13347/13347 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 65981 event pairs, 978 based on Foata normal form. 1/10373 useless extension candidates. Maximal degree in co-relation 28544. Up to 4330 conditions per place. [2025-03-17 06:36:36,961 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 99 selfloop transitions, 34 changer transitions 1/138 dead transitions. [2025-03-17 06:36:36,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 138 transitions, 983 flow [2025-03-17 06:36:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2025-03-17 06:36:36,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2025-03-17 06:36:36,962 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 450 flow. Second operand 6 states and 137 transitions. [2025-03-17 06:36:36,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 138 transitions, 983 flow [2025-03-17 06:36:36,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 955 flow, removed 14 selfloop flow, removed 0 redundant places. [2025-03-17 06:36:36,978 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 664 flow [2025-03-17 06:36:36,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=664, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2025-03-17 06:36:36,979 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2025-03-17 06:36:36,979 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 664 flow [2025-03-17 06:36:36,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:36,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:36,979 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:36,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 06:36:36,979 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)] === [2025-03-17 06:36:36,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash 353391025, now seen corresponding path program 1 times [2025-03-17 06:36:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:36,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361870845] [2025-03-17 06:36:36,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:36,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:36:36,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:36:36,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:36,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:36:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361870845] [2025-03-17 06:36:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361870845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026569023] [2025-03-17 06:36:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:37,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:37,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:37,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:37,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:37,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 664 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:37,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:37,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:37,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:37,618 INFO L124 PetriNetUnfolderBase]: 5636/8461 cut-off events. [2025-03-17 06:36:37,619 INFO L125 PetriNetUnfolderBase]: For 16729/16729 co-relation queries the response was YES. [2025-03-17 06:36:37,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25336 conditions, 8461 events. 5636/8461 cut-off events. For 16729/16729 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 52137 event pairs, 2676 based on Foata normal form. 222/8661 useless extension candidates. Maximal degree in co-relation 25307. Up to 6033 conditions per place. [2025-03-17 06:36:37,672 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 64 selfloop transitions, 4 changer transitions 55/127 dead transitions. [2025-03-17 06:36:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1173 flow [2025-03-17 06:36:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2025-03-17 06:36:37,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-03-17 06:36:37,673 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 664 flow. Second operand 5 states and 98 transitions. [2025-03-17 06:36:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1173 flow [2025-03-17 06:36:37,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1111 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:37,730 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 472 flow [2025-03-17 06:36:37,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=472, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2025-03-17 06:36:37,731 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2025-03-17 06:36:37,731 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 472 flow [2025-03-17 06:36:37,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:37,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:37,731 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:37,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 06:36:37,731 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)] === [2025-03-17 06:36:37,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash -728350033, now seen corresponding path program 4 times [2025-03-17 06:36:37,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:37,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590222238] [2025-03-17 06:36:37,732 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:37,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:37,742 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:36:37,743 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 28 statements. [2025-03-17 06:36:37,744 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:36:37,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590222238] [2025-03-17 06:36:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590222238] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:37,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:37,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018339633] [2025-03-17 06:36:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:37,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:37,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:37,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:37,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:37,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 472 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:37,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:37,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:37,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:38,350 INFO L124 PetriNetUnfolderBase]: 4856/7080 cut-off events. [2025-03-17 06:36:38,350 INFO L125 PetriNetUnfolderBase]: For 10565/10565 co-relation queries the response was YES. [2025-03-17 06:36:38,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20555 conditions, 7080 events. 4856/7080 cut-off events. For 10565/10565 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39836 event pairs, 680 based on Foata normal form. 1/7079 useless extension candidates. Maximal degree in co-relation 20525. Up to 2951 conditions per place. [2025-03-17 06:36:38,387 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 23 changer transitions 1/133 dead transitions. [2025-03-17 06:36:38,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 133 transitions, 980 flow [2025-03-17 06:36:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2025-03-17 06:36:38,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2025-03-17 06:36:38,389 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 472 flow. Second operand 6 states and 137 transitions. [2025-03-17 06:36:38,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 133 transitions, 980 flow [2025-03-17 06:36:38,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 133 transitions, 930 flow, removed 21 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:38,422 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 618 flow [2025-03-17 06:36:38,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2025-03-17 06:36:38,423 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2025-03-17 06:36:38,423 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 618 flow [2025-03-17 06:36:38,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:38,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:38,423 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:38,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 06:36:38,423 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)] === [2025-03-17 06:36:38,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:38,423 INFO L85 PathProgramCache]: Analyzing trace with hash -895071167, now seen corresponding path program 5 times [2025-03-17 06:36:38,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:38,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865409531] [2025-03-17 06:36:38,423 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:38,430 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:36:38,440 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:36:38,440 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:38,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:38,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865409531] [2025-03-17 06:36:38,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865409531] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:38,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:38,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634138109] [2025-03-17 06:36:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:38,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:38,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:38,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:38,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:38,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:38,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:38,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:38,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:38,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:39,076 INFO L124 PetriNetUnfolderBase]: 5742/8398 cut-off events. [2025-03-17 06:36:39,077 INFO L125 PetriNetUnfolderBase]: For 16341/16341 co-relation queries the response was YES. [2025-03-17 06:36:39,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24701 conditions, 8398 events. 5742/8398 cut-off events. For 16341/16341 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 49160 event pairs, 682 based on Foata normal form. 1/8397 useless extension candidates. Maximal degree in co-relation 24673. Up to 3522 conditions per place. [2025-03-17 06:36:39,110 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 28 changer transitions 1/138 dead transitions. [2025-03-17 06:36:39,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 138 transitions, 1112 flow [2025-03-17 06:36:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2025-03-17 06:36:39,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-17 06:36:39,111 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 618 flow. Second operand 6 states and 135 transitions. [2025-03-17 06:36:39,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 138 transitions, 1112 flow [2025-03-17 06:36:39,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1087 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-03-17 06:36:39,138 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 798 flow [2025-03-17 06:36:39,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=798, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2025-03-17 06:36:39,138 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2025-03-17 06:36:39,139 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 798 flow [2025-03-17 06:36:39,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:39,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:39,139 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:39,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 06:36:39,139 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)] === [2025-03-17 06:36:39,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 351777925, now seen corresponding path program 6 times [2025-03-17 06:36:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009128899] [2025-03-17 06:36:39,139 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:39,147 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:36:39,150 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-17 06:36:39,150 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:36:39,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009128899] [2025-03-17 06:36:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009128899] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:39,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172928889] [2025-03-17 06:36:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:39,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:39,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:39,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:39,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:39,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 798 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:39,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:39,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:39,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:39,797 INFO L124 PetriNetUnfolderBase]: 6140/9104 cut-off events. [2025-03-17 06:36:39,797 INFO L125 PetriNetUnfolderBase]: For 27045/27045 co-relation queries the response was YES. [2025-03-17 06:36:39,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29025 conditions, 9104 events. 6140/9104 cut-off events. For 27045/27045 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 54582 event pairs, 834 based on Foata normal form. 1/9103 useless extension candidates. Maximal degree in co-relation 28993. Up to 3547 conditions per place. [2025-03-17 06:36:39,847 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 37 changer transitions 1/155 dead transitions. [2025-03-17 06:36:39,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 155 transitions, 1465 flow [2025-03-17 06:36:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2025-03-17 06:36:39,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2025-03-17 06:36:39,848 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 798 flow. Second operand 6 states and 133 transitions. [2025-03-17 06:36:39,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 155 transitions, 1465 flow [2025-03-17 06:36:39,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 155 transitions, 1426 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:39,898 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1118 flow [2025-03-17 06:36:39,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1118, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2025-03-17 06:36:39,899 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2025-03-17 06:36:39,899 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1118 flow [2025-03-17 06:36:39,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:39,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:39,899 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:39,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 06:36:39,900 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)] === [2025-03-17 06:36:39,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 711302133, now seen corresponding path program 7 times [2025-03-17 06:36:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607021286] [2025-03-17 06:36:39,900 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:39,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:36:39,911 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:36:39,911 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:39,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:39,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:39,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607021286] [2025-03-17 06:36:39,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607021286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:39,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:39,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503370488] [2025-03-17 06:36:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:39,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:39,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:39,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:39,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:39,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:39,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1118 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:39,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:39,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:39,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:40,691 INFO L124 PetriNetUnfolderBase]: 6140/9102 cut-off events. [2025-03-17 06:36:40,691 INFO L125 PetriNetUnfolderBase]: For 35389/35389 co-relation queries the response was YES. [2025-03-17 06:36:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30485 conditions, 9102 events. 6140/9102 cut-off events. For 35389/35389 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 54666 event pairs, 834 based on Foata normal form. 1/9101 useless extension candidates. Maximal degree in co-relation 30450. Up to 3540 conditions per place. [2025-03-17 06:36:40,753 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 33 changer transitions 1/157 dead transitions. [2025-03-17 06:36:40,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1619 flow [2025-03-17 06:36:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:36:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:36:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2025-03-17 06:36:40,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2025-03-17 06:36:40,754 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1118 flow. Second operand 6 states and 133 transitions. [2025-03-17 06:36:40,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1619 flow [2025-03-17 06:36:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1592 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-03-17 06:36:40,859 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1280 flow [2025-03-17 06:36:40,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1280, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2025-03-17 06:36:40,860 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2025-03-17 06:36:40,860 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1280 flow [2025-03-17 06:36:40,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:40,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:40,860 INFO L206 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, 1, 1, 1, 1, 1] [2025-03-17 06:36:40,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 06:36:40,860 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)] === [2025-03-17 06:36:40,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 579701109, now seen corresponding path program 1 times [2025-03-17 06:36:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440408280] [2025-03-17 06:36:40,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:40,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:36:40,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:36:40,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:40,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:40,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440408280] [2025-03-17 06:36:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440408280] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364596090] [2025-03-17 06:36:40,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:40,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:40,954 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) [2025-03-17 06:36:40,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:36:41,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:36:41,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:36:41,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:41,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:41,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:36:41,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:41,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:41,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364596090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:41,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:41,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 06:36:41,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299462133] [2025-03-17 06:36:41,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:41,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:36:41,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:41,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:36:41,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:36:41,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:41,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1280 flow. Second operand has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:41,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:41,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:41,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:42,535 INFO L124 PetriNetUnfolderBase]: 12277/18099 cut-off events. [2025-03-17 06:36:42,535 INFO L125 PetriNetUnfolderBase]: For 89378/89378 co-relation queries the response was YES. [2025-03-17 06:36:42,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63998 conditions, 18099 events. 12277/18099 cut-off events. For 89378/89378 co-relation queries the response was YES. Maximal size of possible extension queue 1182. Compared 120174 event pairs, 4026 based on Foata normal form. 8/18097 useless extension candidates. Maximal degree in co-relation 63959. Up to 7864 conditions per place. [2025-03-17 06:36:42,638 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 219 selfloop transitions, 32 changer transitions 3/258 dead transitions. [2025-03-17 06:36:42,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 258 transitions, 3370 flow [2025-03-17 06:36:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2025-03-17 06:36:42,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4175 [2025-03-17 06:36:42,639 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1280 flow. Second operand 10 states and 167 transitions. [2025-03-17 06:36:42,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 258 transitions, 3370 flow [2025-03-17 06:36:42,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 258 transitions, 3260 flow, removed 26 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:42,972 INFO L231 Difference]: Finished difference. Result has 111 places, 138 transitions, 1665 flow [2025-03-17 06:36:42,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1665, PETRI_PLACES=111, PETRI_TRANSITIONS=138} [2025-03-17 06:36:42,973 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 74 predicate places. [2025-03-17 06:36:42,973 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 138 transitions, 1665 flow [2025-03-17 06:36:42,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:42,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:42,973 INFO L206 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, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:42,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:36:43,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:43,173 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)] === [2025-03-17 06:36:43,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1119365289, now seen corresponding path program 1 times [2025-03-17 06:36:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:43,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216042103] [2025-03-17 06:36:43,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:43,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:36:43,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:36:43,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:43,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216042103] [2025-03-17 06:36:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216042103] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888763778] [2025-03-17 06:36:43,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:43,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:43,326 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) [2025-03-17 06:36:43,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:36:43,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:36:43,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:36:43,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:43,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:43,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:36:43,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:43,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:43,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888763778] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:43,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:43,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-03-17 06:36:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336868607] [2025-03-17 06:36:43,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:43,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 06:36:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:43,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 06:36:43,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:36:43,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:43,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 138 transitions, 1665 flow. Second operand has 19 states, 19 states have (on average 9.789473684210526) internal successors, (186), 19 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:43,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:43,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:43,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:46,100 INFO L124 PetriNetUnfolderBase]: 18410/27012 cut-off events. [2025-03-17 06:36:46,101 INFO L125 PetriNetUnfolderBase]: For 136544/136544 co-relation queries the response was YES. [2025-03-17 06:36:46,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96126 conditions, 27012 events. 18410/27012 cut-off events. For 136544/136544 co-relation queries the response was YES. Maximal size of possible extension queue 1722. Compared 187320 event pairs, 8718 based on Foata normal form. 8/27011 useless extension candidates. Maximal degree in co-relation 96082. Up to 8507 conditions per place. [2025-03-17 06:36:46,394 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 290 selfloop transitions, 30 changer transitions 2/326 dead transitions. [2025-03-17 06:36:46,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 326 transitions, 4492 flow [2025-03-17 06:36:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2025-03-17 06:36:46,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.445 [2025-03-17 06:36:46,395 INFO L175 Difference]: Start difference. First operand has 111 places, 138 transitions, 1665 flow. Second operand 10 states and 178 transitions. [2025-03-17 06:36:46,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 326 transitions, 4492 flow [2025-03-17 06:36:47,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 326 transitions, 4441 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:47,058 INFO L231 Difference]: Finished difference. Result has 122 places, 161 transitions, 2065 flow [2025-03-17 06:36:47,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2065, PETRI_PLACES=122, PETRI_TRANSITIONS=161} [2025-03-17 06:36:47,059 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 85 predicate places. [2025-03-17 06:36:47,059 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 161 transitions, 2065 flow [2025-03-17 06:36:47,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.789473684210526) internal successors, (186), 19 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:47,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:47,059 INFO L206 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, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:47,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:47,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:47,259 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)] === [2025-03-17 06:36:47,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1500459225, now seen corresponding path program 2 times [2025-03-17 06:36:47,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:47,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835437076] [2025-03-17 06:36:47,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:47,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:36:47,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 29 statements. [2025-03-17 06:36:47,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:47,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835437076] [2025-03-17 06:36:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835437076] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:47,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:47,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:47,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804385550] [2025-03-17 06:36:47,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:47,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:36:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:47,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:36:47,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:36:47,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:36:47,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 161 transitions, 2065 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:47,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:47,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:36:47,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:55,486 INFO L124 PetriNetUnfolderBase]: 59240/85164 cut-off events. [2025-03-17 06:36:55,486 INFO L125 PetriNetUnfolderBase]: For 429383/429383 co-relation queries the response was YES. [2025-03-17 06:36:55,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297207 conditions, 85164 events. 59240/85164 cut-off events. For 429383/429383 co-relation queries the response was YES. Maximal size of possible extension queue 4724. Compared 646681 event pairs, 4044 based on Foata normal form. 4/80996 useless extension candidates. Maximal degree in co-relation 297159. Up to 30989 conditions per place. [2025-03-17 06:36:56,343 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 460 selfloop transitions, 89 changer transitions 4/556 dead transitions. [2025-03-17 06:36:56,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 556 transitions, 7918 flow [2025-03-17 06:36:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:36:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:36:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2025-03-17 06:36:56,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2025-03-17 06:36:56,345 INFO L175 Difference]: Start difference. First operand has 122 places, 161 transitions, 2065 flow. Second operand 11 states and 253 transitions. [2025-03-17 06:36:56,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 556 transitions, 7918 flow [2025-03-17 06:36:58,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 556 transitions, 7905 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:58,639 INFO L231 Difference]: Finished difference. Result has 137 places, 230 transitions, 3608 flow [2025-03-17 06:36:58,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3608, PETRI_PLACES=137, PETRI_TRANSITIONS=230} [2025-03-17 06:36:58,640 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 100 predicate places. [2025-03-17 06:36:58,640 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 230 transitions, 3608 flow [2025-03-17 06:36:58,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:58,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:58,640 INFO L206 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, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:58,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 06:36:58,640 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)] === [2025-03-17 06:36:58,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash 963836481, now seen corresponding path program 3 times [2025-03-17 06:36:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:58,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910898200] [2025-03-17 06:36:58,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:58,649 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:36:58,658 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 29 statements. [2025-03-17 06:36:58,658 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:58,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:36:58,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:58,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910898200] [2025-03-17 06:36:58,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910898200] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:58,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:58,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:36:58,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039682955] [2025-03-17 06:36:58,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:58,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:58,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:58,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:58,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:36:58,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 230 transitions, 3608 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:58,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:58,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:36:58,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:13,094 INFO L124 PetriNetUnfolderBase]: 91508/130251 cut-off events. [2025-03-17 06:37:13,094 INFO L125 PetriNetUnfolderBase]: For 839263/839587 co-relation queries the response was YES. [2025-03-17 06:37:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512589 conditions, 130251 events. 91508/130251 cut-off events. For 839263/839587 co-relation queries the response was YES. Maximal size of possible extension queue 6979. Compared 1017878 event pairs, 8642 based on Foata normal form. 350/123452 useless extension candidates. Maximal degree in co-relation 512533. Up to 54770 conditions per place. [2025-03-17 06:37:14,579 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 432 selfloop transitions, 91 changer transitions 88/616 dead transitions. [2025-03-17 06:37:14,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 616 transitions, 10271 flow [2025-03-17 06:37:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2025-03-17 06:37:14,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-03-17 06:37:14,580 INFO L175 Difference]: Start difference. First operand has 137 places, 230 transitions, 3608 flow. Second operand 9 states and 208 transitions. [2025-03-17 06:37:14,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 616 transitions, 10271 flow [2025-03-17 06:37:20,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 616 transitions, 10207 flow, removed 24 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:20,957 INFO L231 Difference]: Finished difference. Result has 148 places, 292 transitions, 5131 flow [2025-03-17 06:37:20,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5131, PETRI_PLACES=148, PETRI_TRANSITIONS=292} [2025-03-17 06:37:20,958 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2025-03-17 06:37:20,958 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 292 transitions, 5131 flow [2025-03-17 06:37:20,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:20,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:20,958 INFO L206 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, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:20,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 06:37:20,958 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)] === [2025-03-17 06:37:20,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2066179267, now seen corresponding path program 4 times [2025-03-17 06:37:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543625304] [2025-03-17 06:37:20,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:37:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:20,967 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:37:20,970 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 29 statements. [2025-03-17 06:37:20,971 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:37:20,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 06:37:21,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:21,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543625304] [2025-03-17 06:37:21,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543625304] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:21,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:21,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:37:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320735801] [2025-03-17 06:37:21,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:21,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:37:21,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:21,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:37:21,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:37:21,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:37:21,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 292 transitions, 5131 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:21,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:21,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:37:21,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand