./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:28:57,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:28:57,844 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:28:57,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:28:57,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:28:57,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:28:57,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:28:57,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:28:57,869 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:28:57,869 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:28:57,869 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:28:57,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:28:57,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:28:57,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:28:57,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:28:57,871 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:28:57,872 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:28:57,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:28:57,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:28:57,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:28:57,874 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 -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2025-03-08 17:28:58,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:28:58,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:28:58,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:28:58,102 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:28:58,102 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:28:58,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-03-08 17:28:59,253 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ee888d/3b0ea0f3a2af41299b09ea04d5810055/FLAG48b95b1c0 [2025-03-08 17:28:59,514 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:28:59,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-03-08 17:28:59,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ee888d/3b0ea0f3a2af41299b09ea04d5810055/FLAG48b95b1c0 [2025-03-08 17:28:59,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ee888d/3b0ea0f3a2af41299b09ea04d5810055 [2025-03-08 17:28:59,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:28:59,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:28:59,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:28:59,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:28:59,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:28:59,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:28:59" (1/1) ... [2025-03-08 17:28:59,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22297960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:28:59, skipping insertion in model container [2025-03-08 17:28:59,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:28:59" (1/1) ... [2025-03-08 17:28:59,843 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:28:59,972 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-chromosome-symm.wvr.c[2721,2734] [2025-03-08 17:28:59,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:28:59,994 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:29:00,015 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-chromosome-symm.wvr.c[2721,2734] [2025-03-08 17:29:00,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:29:00,034 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:29:00,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00 WrapperNode [2025-03-08 17:29:00,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:29:00,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:00,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:29:00,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:29:00,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,063 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 179 [2025-03-08 17:29:00,063 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:00,064 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:29:00,064 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:29:00,064 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:29:00,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,086 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-08 17:29:00,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,094 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:29:00,098 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:29:00,099 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:29:00,099 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:29:00,099 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (1/1) ... [2025-03-08 17:29:00,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:29:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:00,122 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) [2025-03-08 17:29:00,124 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 [2025-03-08 17:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:29:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:29:00,142 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:29:00,209 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:29:00,211 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:29:00,490 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:29:00,490 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:29:00,692 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:29:00,693 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:29:00,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:00 BoogieIcfgContainer [2025-03-08 17:29:00,693 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:29:00,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:29:00,695 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:29:00,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:29:00,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:28:59" (1/3) ... [2025-03-08 17:29:00,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ab6a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:00, skipping insertion in model container [2025-03-08 17:29:00,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:00" (2/3) ... [2025-03-08 17:29:00,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ab6a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:00, skipping insertion in model container [2025-03-08 17:29:00,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:00" (3/3) ... [2025-03-08 17:29:00,700 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2025-03-08 17:29:00,711 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:29:00,712 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-symm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 17:29:00,713 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:29:00,761 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:29:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2025-03-08 17:29:00,812 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2025-03-08 17:29:00,814 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:00,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2025-03-08 17:29:00,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2025-03-08 17:29:00,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2025-03-08 17:29:00,826 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:29:00,835 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;@57c76916, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:29:00,836 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:29:00,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:29:00,844 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2025-03-08 17:29:00,844 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:00,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:00,844 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:00,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:00,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash -640687221, now seen corresponding path program 1 times [2025-03-08 17:29:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085330572] [2025-03-08 17:29:00,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:00,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:29:00,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:29:00,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:00,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085330572] [2025-03-08 17:29:01,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085330572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:01,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:01,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:29:01,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671711547] [2025-03-08 17:29:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:01,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:01,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:01,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:01,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:01,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:01,269 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2025-03-08 17:29:01,269 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-08 17:29:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2025-03-08 17:29:01,272 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2025-03-08 17:29:01,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2025-03-08 17:29:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2025-03-08 17:29:01,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2025-03-08 17:29:01,283 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2025-03-08 17:29:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2025-03-08 17:29:01,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:01,290 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2025-03-08 17:29:01,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2025-03-08 17:29:01,296 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2025-03-08 17:29:01,296 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2025-03-08 17:29:01,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:01,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:01,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:01,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:29:01,297 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:01,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash -449448040, now seen corresponding path program 1 times [2025-03-08 17:29:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:01,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978538085] [2025-03-08 17:29:01,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:01,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:29:01,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:29:01,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:01,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978538085] [2025-03-08 17:29:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978538085] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539574639] [2025-03-08 17:29:01,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:01,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:01,463 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) [2025-03-08 17:29:01,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:29:01,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:29:01,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:29:01,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:01,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:01,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:29:01,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:01,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539574639] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:01,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:01,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-08 17:29:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859682858] [2025-03-08 17:29:01,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:01,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:29:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:01,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:29:01,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:29:01,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:01,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:01,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:01,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:01,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:01,698 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2025-03-08 17:29:01,700 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:01,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2025-03-08 17:29:01,701 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2025-03-08 17:29:01,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2025-03-08 17:29:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:29:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:29:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2025-03-08 17:29:01,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2025-03-08 17:29:01,703 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2025-03-08 17:29:01,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2025-03-08 17:29:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:01,705 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2025-03-08 17:29:01,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2025-03-08 17:29:01,707 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2025-03-08 17:29:01,707 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2025-03-08 17:29:01,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:01,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:01,707 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:01,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:01,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:01,909 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:01,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1344505715, now seen corresponding path program 2 times [2025-03-08 17:29:01,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:01,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516409396] [2025-03-08 17:29:01,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:01,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:01,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:01,949 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-03-08 17:29:01,949 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:01,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:02,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:02,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516409396] [2025-03-08 17:29:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516409396] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:02,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:02,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945582111] [2025-03-08 17:29:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:02,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:02,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:02,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:02,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:02,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:02,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:02,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:02,217 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2025-03-08 17:29:02,217 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:29:02,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2025-03-08 17:29:02,219 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2025-03-08 17:29:02,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2025-03-08 17:29:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2025-03-08 17:29:02,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-03-08 17:29:02,219 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2025-03-08 17:29:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2025-03-08 17:29:02,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:02,221 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2025-03-08 17:29:02,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2025-03-08 17:29:02,222 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2025-03-08 17:29:02,222 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2025-03-08 17:29:02,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:02,222 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:02,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:29:02,223 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:02,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1305307343, now seen corresponding path program 3 times [2025-03-08 17:29:02,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:02,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321636535] [2025-03-08 17:29:02,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:02,234 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-08 17:29:02,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-03-08 17:29:02,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:29:02,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321636535] [2025-03-08 17:29:02,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321636535] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:02,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:02,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292113185] [2025-03-08 17:29:02,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:02,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:02,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:02,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:02,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:02,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:02,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:02,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:02,493 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2025-03-08 17:29:02,493 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-03-08 17:29:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 516 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2025-03-08 17:29:02,495 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2025-03-08 17:29:02,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2025-03-08 17:29:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-03-08 17:29:02,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:29:02,497 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2025-03-08 17:29:02,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2025-03-08 17:29:02,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:02,499 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2025-03-08 17:29:02,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-03-08 17:29:02,499 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2025-03-08 17:29:02,499 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2025-03-08 17:29:02,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:02,499 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:02,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:29:02,499 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:02,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2079020195, now seen corresponding path program 4 times [2025-03-08 17:29:02,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:02,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386289478] [2025-03-08 17:29:02,501 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:02,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:02,513 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:02,523 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:02,523 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:02,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:02,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386289478] [2025-03-08 17:29:02,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386289478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:02,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872599780] [2025-03-08 17:29:02,648 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:02,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:02,650 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) [2025-03-08 17:29:02,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:29:02,707 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:02,735 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:02,735 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:02,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:02,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:29:02,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:02,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872599780] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:02,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-08 17:29:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974155777] [2025-03-08 17:29:02,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:02,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:29:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:02,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:29:02,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:29:02,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:02,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:02,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:02,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:02,981 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2025-03-08 17:29:02,982 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-03-08 17:29:02,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 508 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2025-03-08 17:29:02,984 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2025-03-08 17:29:02,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2025-03-08 17:29:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:29:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:29:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2025-03-08 17:29:02,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2025-03-08 17:29:02,987 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2025-03-08 17:29:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2025-03-08 17:29:02,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:02,990 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2025-03-08 17:29:02,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2025-03-08 17:29:02,990 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2025-03-08 17:29:02,990 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2025-03-08 17:29:02,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:02,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:02,990 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:02,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:03,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:03,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:03,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -517548544, now seen corresponding path program 5 times [2025-03-08 17:29:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:03,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427070165] [2025-03-08 17:29:03,192 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:03,204 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 4 equivalence classes. [2025-03-08 17:29:03,222 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:03,226 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 17:29:03,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:03,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427070165] [2025-03-08 17:29:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427070165] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:03,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:03,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770683219] [2025-03-08 17:29:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:03,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:03,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:03,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:03,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:03,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:03,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:03,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:03,480 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2025-03-08 17:29:03,481 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-03-08 17:29:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 624 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2025-03-08 17:29:03,482 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2025-03-08 17:29:03,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2025-03-08 17:29:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2025-03-08 17:29:03,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-08 17:29:03,483 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2025-03-08 17:29:03,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2025-03-08 17:29:03,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:03,486 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2025-03-08 17:29:03,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2025-03-08 17:29:03,486 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2025-03-08 17:29:03,486 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2025-03-08 17:29:03,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:03,486 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:03,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:29:03,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:03,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash -162157616, now seen corresponding path program 6 times [2025-03-08 17:29:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122690229] [2025-03-08 17:29:03,487 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:03,498 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 4 equivalence classes. [2025-03-08 17:29:03,505 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 15 of 25 statements. [2025-03-08 17:29:03,505 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:29:03,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:03,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122690229] [2025-03-08 17:29:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122690229] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:03,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130688490] [2025-03-08 17:29:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:03,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:03,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:03,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:03,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:03,697 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2025-03-08 17:29:03,697 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2025-03-08 17:29:03,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 454 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2025-03-08 17:29:03,701 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2025-03-08 17:29:03,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2025-03-08 17:29:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-03-08 17:29:03,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-03-08 17:29:03,702 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2025-03-08 17:29:03,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2025-03-08 17:29:03,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:03,704 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2025-03-08 17:29:03,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2025-03-08 17:29:03,705 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-03-08 17:29:03,705 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2025-03-08 17:29:03,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:03,705 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:03,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:29:03,705 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:03,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 759142737, now seen corresponding path program 1 times [2025-03-08 17:29:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634348908] [2025-03-08 17:29:03,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:03,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 17:29:03,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:29:03,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:03,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:03,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634348908] [2025-03-08 17:29:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634348908] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:03,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083042759] [2025-03-08 17:29:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:03,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:03,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:03,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:03,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:03,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:03,974 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2025-03-08 17:29:03,975 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2025-03-08 17:29:03,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 437 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2025-03-08 17:29:03,976 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-03-08 17:29:03,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2025-03-08 17:29:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-03-08 17:29:03,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2025-03-08 17:29:03,978 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2025-03-08 17:29:03,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2025-03-08 17:29:03,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:03,982 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2025-03-08 17:29:03,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2025-03-08 17:29:03,983 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-03-08 17:29:03,984 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2025-03-08 17:29:03,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:03,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:03,984 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:03,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:29:03,985 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:03,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -287282197, now seen corresponding path program 2 times [2025-03-08 17:29:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994554600] [2025-03-08 17:29:03,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:03,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-08 17:29:04,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 26 statements. [2025-03-08 17:29:04,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:04,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994554600] [2025-03-08 17:29:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994554600] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:04,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909820201] [2025-03-08 17:29:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:04,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:04,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:04,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:04,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:04,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:04,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:04,192 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2025-03-08 17:29:04,192 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2025-03-08 17:29:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 363 event pairs, 25 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2025-03-08 17:29:04,194 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-03-08 17:29:04,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2025-03-08 17:29:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-03-08 17:29:04,195 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2025-03-08 17:29:04,195 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2025-03-08 17:29:04,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2025-03-08 17:29:04,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:04,197 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2025-03-08 17:29:04,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2025-03-08 17:29:04,198 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2025-03-08 17:29:04,198 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2025-03-08 17:29:04,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:04,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:04,198 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:04,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:29:04,198 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:04,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -117076279, now seen corresponding path program 1 times [2025-03-08 17:29:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075382636] [2025-03-08 17:29:04,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:04,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:29:04,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:04,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:04,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075382636] [2025-03-08 17:29:04,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075382636] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:04,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550198861] [2025-03-08 17:29:04,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:04,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:04,884 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) [2025-03-08 17:29:04,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:29:04,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:29:04,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:04,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:04,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:04,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:29:04,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:05,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:05,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 17:29:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:05,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:05,552 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:05,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2025-03-08 17:29:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550198861] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:05,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:05,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-08 17:29:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970797410] [2025-03-08 17:29:05,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:05,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:05,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:05,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:05,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:05,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:05,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:05,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:05,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:06,137 INFO L124 PetriNetUnfolderBase]: 139/258 cut-off events. [2025-03-08 17:29:06,137 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2025-03-08 17:29:06,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 258 events. 139/258 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 788 event pairs, 12 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 863. Up to 99 conditions per place. [2025-03-08 17:29:06,139 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 55 selfloop transitions, 20 changer transitions 3/79 dead transitions. [2025-03-08 17:29:06,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 584 flow [2025-03-08 17:29:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:29:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:29:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2025-03-08 17:29:06,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2025-03-08 17:29:06,139 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 12 states and 96 transitions. [2025-03-08 17:29:06,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 584 flow [2025-03-08 17:29:06,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 550 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:06,143 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 372 flow [2025-03-08 17:29:06,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2025-03-08 17:29:06,143 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-03-08 17:29:06,143 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 372 flow [2025-03-08 17:29:06,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:06,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:06,144 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:06,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:29:06,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:06,344 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:06,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:06,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1010107613, now seen corresponding path program 2 times [2025-03-08 17:29:06,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388726638] [2025-03-08 17:29:06,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:06,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:06,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:06,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:06,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:06,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:06,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388726638] [2025-03-08 17:29:06,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388726638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256251007] [2025-03-08 17:29:06,933 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:06,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:06,935 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) [2025-03-08 17:29:06,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:29:06,991 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:07,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:07,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:07,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:07,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:29:07,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:07,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:07,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-08 17:29:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:07,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:07,521 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:29:07,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:29:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256251007] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:07,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:07,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2025-03-08 17:29:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100536222] [2025-03-08 17:29:07,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:07,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:07,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:07,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:07,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:07,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:07,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 372 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:07,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:07,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:07,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:07,983 INFO L124 PetriNetUnfolderBase]: 159/293 cut-off events. [2025-03-08 17:29:07,984 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2025-03-08 17:29:07,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 293 events. 159/293 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 946 event pairs, 26 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1095. Up to 218 conditions per place. [2025-03-08 17:29:07,986 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 50 selfloop transitions, 23 changer transitions 3/77 dead transitions. [2025-03-08 17:29:07,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 640 flow [2025-03-08 17:29:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:29:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:29:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-03-08 17:29:07,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-03-08 17:29:07,987 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 372 flow. Second operand 13 states and 91 transitions. [2025-03-08 17:29:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 640 flow [2025-03-08 17:29:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 611 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:07,990 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 478 flow [2025-03-08 17:29:07,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2025-03-08 17:29:07,991 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2025-03-08 17:29:07,991 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 478 flow [2025-03-08 17:29:07,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:07,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:07,992 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:07,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:29:08,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:08,192 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:08,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1797758173, now seen corresponding path program 3 times [2025-03-08 17:29:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:08,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633664014] [2025-03-08 17:29:08,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:08,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-08 17:29:08,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-03-08 17:29:08,225 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:08,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633664014] [2025-03-08 17:29:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633664014] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271854781] [2025-03-08 17:29:08,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:08,643 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) [2025-03-08 17:29:08,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:29:08,702 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-08 17:29:08,725 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-03-08 17:29:08,726 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:08,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:08,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:29:08,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:08,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:08,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-08 17:29:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:08,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:09,192 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:29:09,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:29:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271854781] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:09,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2025-03-08 17:29:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080791431] [2025-03-08 17:29:09,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:09,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:09,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:09,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:09,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:09,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 478 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:09,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:09,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:09,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:09,690 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2025-03-08 17:29:09,691 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2025-03-08 17:29:09,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 318 events. 173/318 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1073 event pairs, 25 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 1348. Up to 234 conditions per place. [2025-03-08 17:29:09,695 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 56 selfloop transitions, 25 changer transitions 2/84 dead transitions. [2025-03-08 17:29:09,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 769 flow [2025-03-08 17:29:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:29:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:29:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-03-08 17:29:09,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-08 17:29:09,697 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 478 flow. Second operand 12 states and 88 transitions. [2025-03-08 17:29:09,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 769 flow [2025-03-08 17:29:09,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 718 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:09,703 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 568 flow [2025-03-08 17:29:09,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=568, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2025-03-08 17:29:09,704 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 61 predicate places. [2025-03-08 17:29:09,705 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 568 flow [2025-03-08 17:29:09,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:09,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:09,705 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:09,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:09,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 17:29:09,906 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:09,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash -784502227, now seen corresponding path program 4 times [2025-03-08 17:29:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:09,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941786800] [2025-03-08 17:29:09,906 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:09,915 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:09,941 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:09,941 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:09,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:10,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:10,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941786800] [2025-03-08 17:29:10,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941786800] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:10,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15421429] [2025-03-08 17:29:10,473 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:10,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:10,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:29:10,535 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:10,561 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:10,561 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:10,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:10,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:29:10,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:10,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:10,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 17:29:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:10,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:10,960 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:29:10,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:29:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:11,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15421429] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:11,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:11,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-08 17:29:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849979067] [2025-03-08 17:29:11,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:11,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:11,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:11,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:11,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:11,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 568 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:11,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:11,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:11,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:11,556 INFO L124 PetriNetUnfolderBase]: 175/326 cut-off events. [2025-03-08 17:29:11,557 INFO L125 PetriNetUnfolderBase]: For 1183/1183 co-relation queries the response was YES. [2025-03-08 17:29:11,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 326 events. 175/326 cut-off events. For 1183/1183 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1127 event pairs, 23 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1519. Up to 240 conditions per place. [2025-03-08 17:29:11,559 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 57 selfloop transitions, 24 changer transitions 4/86 dead transitions. [2025-03-08 17:29:11,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 824 flow [2025-03-08 17:29:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:29:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:29:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-03-08 17:29:11,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-03-08 17:29:11,561 INFO L175 Difference]: Start difference. First operand has 83 places, 67 transitions, 568 flow. Second operand 13 states and 91 transitions. [2025-03-08 17:29:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 824 flow [2025-03-08 17:29:11,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 763 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:11,567 INFO L231 Difference]: Finished difference. Result has 89 places, 68 transitions, 572 flow [2025-03-08 17:29:11,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2025-03-08 17:29:11,567 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 67 predicate places. [2025-03-08 17:29:11,567 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 572 flow [2025-03-08 17:29:11,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:11,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:11,568 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:11,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:11,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:11,769 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:11,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:11,769 INFO L85 PathProgramCache]: Analyzing trace with hash 938288997, now seen corresponding path program 5 times [2025-03-08 17:29:11,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880497629] [2025-03-08 17:29:11,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:11,778 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-03-08 17:29:11,824 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:11,824 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:11,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880497629] [2025-03-08 17:29:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880497629] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624447372] [2025-03-08 17:29:12,678 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:12,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:12,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:12,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:29:12,748 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-03-08 17:29:12,880 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:12,880 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:12,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:12,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-08 17:29:12,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:13,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:13,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-08 17:29:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:13,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:13,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:13,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2025-03-08 17:29:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:13,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624447372] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:13,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:13,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2025-03-08 17:29:13,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977841292] [2025-03-08 17:29:13,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:13,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 17:29:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:13,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 17:29:13,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2025-03-08 17:29:13,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:13,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 572 flow. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:13,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:13,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:13,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:14,607 INFO L124 PetriNetUnfolderBase]: 205/407 cut-off events. [2025-03-08 17:29:14,608 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2025-03-08 17:29:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 407 events. 205/407 cut-off events. For 1427/1427 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1586 event pairs, 63 based on Foata normal form. 5/386 useless extension candidates. Maximal degree in co-relation 1856. Up to 246 conditions per place. [2025-03-08 17:29:14,611 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 70 selfloop transitions, 36 changer transitions 12/119 dead transitions. [2025-03-08 17:29:14,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 1098 flow [2025-03-08 17:29:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:29:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:29:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2025-03-08 17:29:14,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35406698564593303 [2025-03-08 17:29:14,612 INFO L175 Difference]: Start difference. First operand has 89 places, 68 transitions, 572 flow. Second operand 19 states and 148 transitions. [2025-03-08 17:29:14,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 1098 flow [2025-03-08 17:29:14,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 1044 flow, removed 2 selfloop flow, removed 12 redundant places. [2025-03-08 17:29:14,617 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 703 flow [2025-03-08 17:29:14,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=703, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2025-03-08 17:29:14,618 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2025-03-08 17:29:14,618 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 703 flow [2025-03-08 17:29:14,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:14,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:14,618 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:14,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:29:14,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:14,819 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:14,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1420573557, now seen corresponding path program 6 times [2025-03-08 17:29:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082621395] [2025-03-08 17:29:14,819 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:14,827 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-03-08 17:29:14,841 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-03-08 17:29:14,841 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:14,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:15,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082621395] [2025-03-08 17:29:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082621395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616501602] [2025-03-08 17:29:15,247 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:15,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:29:15,317 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-03-08 17:29:15,337 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-03-08 17:29:15,337 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:15,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:15,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:29:15,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:15,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:15,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 17:29:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:15,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:15,721 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:29:15,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:29:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:15,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616501602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:15,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:15,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-08 17:29:15,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648966485] [2025-03-08 17:29:15,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:15,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:15,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:15,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:15,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 703 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:15,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:15,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:16,315 INFO L124 PetriNetUnfolderBase]: 217/423 cut-off events. [2025-03-08 17:29:16,315 INFO L125 PetriNetUnfolderBase]: For 3406/3406 co-relation queries the response was YES. [2025-03-08 17:29:16,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 423 events. 217/423 cut-off events. For 3406/3406 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1649 event pairs, 62 based on Foata normal form. 2/425 useless extension candidates. Maximal degree in co-relation 2368. Up to 309 conditions per place. [2025-03-08 17:29:16,318 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 70 selfloop transitions, 26 changer transitions 4/101 dead transitions. [2025-03-08 17:29:16,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 1123 flow [2025-03-08 17:29:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:29:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:29:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-03-08 17:29:16,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-03-08 17:29:16,319 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 703 flow. Second operand 13 states and 91 transitions. [2025-03-08 17:29:16,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 1123 flow [2025-03-08 17:29:16,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 986 flow, removed 47 selfloop flow, removed 13 redundant places. [2025-03-08 17:29:16,328 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 754 flow [2025-03-08 17:29:16,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=754, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2025-03-08 17:29:16,329 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 77 predicate places. [2025-03-08 17:29:16,330 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 754 flow [2025-03-08 17:29:16,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:16,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:16,331 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:16,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:29:16,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:29:16,535 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:16,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1145346405, now seen corresponding path program 7 times [2025-03-08 17:29:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:16,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763241579] [2025-03-08 17:29:16,536 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:16,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:29:16,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:16,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:16,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763241579] [2025-03-08 17:29:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763241579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258524645] [2025-03-08 17:29:17,452 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:17,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:17,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:29:17,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:29:17,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:17,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:17,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:17,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:29:17,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:17,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:17,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 17:29:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:17,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:17,920 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:29:17,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:29:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258524645] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:17,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:17,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 29 [2025-03-08 17:29:17,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734727883] [2025-03-08 17:29:17,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:17,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:29:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:17,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:29:17,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:29:17,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:17,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 754 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:17,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:17,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:17,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:18,671 INFO L124 PetriNetUnfolderBase]: 235/459 cut-off events. [2025-03-08 17:29:18,672 INFO L125 PetriNetUnfolderBase]: For 3819/3819 co-relation queries the response was YES. [2025-03-08 17:29:18,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 459 events. 235/459 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1873 event pairs, 67 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2586. Up to 348 conditions per place. [2025-03-08 17:29:18,675 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 67 selfloop transitions, 36 changer transitions 3/107 dead transitions. [2025-03-08 17:29:18,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 1156 flow [2025-03-08 17:29:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:29:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:29:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 116 transitions. [2025-03-08 17:29:18,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29292929292929293 [2025-03-08 17:29:18,676 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 754 flow. Second operand 18 states and 116 transitions. [2025-03-08 17:29:18,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 1156 flow [2025-03-08 17:29:18,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 1111 flow, removed 16 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:18,684 INFO L231 Difference]: Finished difference. Result has 112 places, 89 transitions, 887 flow [2025-03-08 17:29:18,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=89} [2025-03-08 17:29:18,685 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2025-03-08 17:29:18,685 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 89 transitions, 887 flow [2025-03-08 17:29:18,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:18,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:18,685 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:18,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:29:18,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:29:18,886 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:18,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1644982595, now seen corresponding path program 8 times [2025-03-08 17:29:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145695912] [2025-03-08 17:29:18,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:18,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:18,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:18,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:18,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:19,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145695912] [2025-03-08 17:29:19,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145695912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393804011] [2025-03-08 17:29:19,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:19,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:19,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:29:19,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:29:19,371 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:29:19,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:19,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:19,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:29:19,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:19,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:19,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 17:29:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:19,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:19,775 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:19,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2025-03-08 17:29:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393804011] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:19,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-08 17:29:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319722770] [2025-03-08 17:29:19,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:19,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:19,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:19,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:19,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:19,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:19,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 89 transitions, 887 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:19,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:19,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:19,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:20,272 INFO L124 PetriNetUnfolderBase]: 275/531 cut-off events. [2025-03-08 17:29:20,272 INFO L125 PetriNetUnfolderBase]: For 5253/5253 co-relation queries the response was YES. [2025-03-08 17:29:20,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3330 conditions, 531 events. 275/531 cut-off events. For 5253/5253 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2274 event pairs, 45 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 3231. Up to 215 conditions per place. [2025-03-08 17:29:20,276 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2025-03-08 17:29:20,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 1429 flow [2025-03-08 17:29:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:29:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:29:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2025-03-08 17:29:20,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2025-03-08 17:29:20,277 INFO L175 Difference]: Start difference. First operand has 112 places, 89 transitions, 887 flow. Second operand 12 states and 90 transitions. [2025-03-08 17:29:20,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 1429 flow [2025-03-08 17:29:20,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 118 transitions, 1334 flow, removed 18 selfloop flow, removed 15 redundant places. [2025-03-08 17:29:20,286 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 1048 flow [2025-03-08 17:29:20,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2025-03-08 17:29:20,287 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2025-03-08 17:29:20,287 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 1048 flow [2025-03-08 17:29:20,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:20,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:20,287 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:20,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:20,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:29:20,492 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:20,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash -536552746, now seen corresponding path program 9 times [2025-03-08 17:29:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873523527] [2025-03-08 17:29:20,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:20,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:20,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:20,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:20,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873523527] [2025-03-08 17:29:20,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873523527] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47362211] [2025-03-08 17:29:20,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:20,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:20,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:20,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:20,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:29:20,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:20,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:20,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:20,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:20,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:20,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:20,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:21,066 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:21,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:29:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47362211] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:21,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:21,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:29:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068833387] [2025-03-08 17:29:21,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:21,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:29:21,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:21,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:29:21,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:29:21,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:21,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 1048 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:21,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:21,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:21,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:21,421 INFO L124 PetriNetUnfolderBase]: 289/555 cut-off events. [2025-03-08 17:29:21,421 INFO L125 PetriNetUnfolderBase]: For 6221/6221 co-relation queries the response was YES. [2025-03-08 17:29:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 555 events. 289/555 cut-off events. For 6221/6221 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2410 event pairs, 45 based on Foata normal form. 5/560 useless extension candidates. Maximal degree in co-relation 3614. Up to 262 conditions per place. [2025-03-08 17:29:21,425 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2025-03-08 17:29:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 1604 flow [2025-03-08 17:29:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2025-03-08 17:29:21,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-08 17:29:21,427 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 1048 flow. Second operand 10 states and 84 transitions. [2025-03-08 17:29:21,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 1604 flow [2025-03-08 17:29:21,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 1540 flow, removed 20 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:21,439 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 1105 flow [2025-03-08 17:29:21,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1105, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2025-03-08 17:29:21,440 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 95 predicate places. [2025-03-08 17:29:21,440 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 1105 flow [2025-03-08 17:29:21,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:21,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:21,440 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:21,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 17:29:21,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:29:21,641 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:21,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:21,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1285245635, now seen corresponding path program 10 times [2025-03-08 17:29:21,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:21,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870772920] [2025-03-08 17:29:21,642 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:21,648 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:21,668 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:21,668 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:21,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870772920] [2025-03-08 17:29:21,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870772920] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697621316] [2025-03-08 17:29:21,980 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:21,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:21,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:29:22,055 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:22,077 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:22,077 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:22,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:22,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 17:29:22,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:22,191 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-08 17:29:22,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 31 [2025-03-08 17:29:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:22,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:22,394 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:22,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:22,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697621316] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:22,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:22,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2025-03-08 17:29:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670336473] [2025-03-08 17:29:22,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:22,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:29:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:22,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:29:22,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:29:22,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:22,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 1105 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:22,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:22,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:22,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:22,820 INFO L124 PetriNetUnfolderBase]: 292/568 cut-off events. [2025-03-08 17:29:22,820 INFO L125 PetriNetUnfolderBase]: For 6616/6616 co-relation queries the response was YES. [2025-03-08 17:29:22,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3841 conditions, 568 events. 292/568 cut-off events. For 6616/6616 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2587 event pairs, 25 based on Foata normal form. 3/571 useless extension candidates. Maximal degree in co-relation 3753. Up to 213 conditions per place. [2025-03-08 17:29:22,827 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 36 changer transitions 13/139 dead transitions. [2025-03-08 17:29:22,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 139 transitions, 1747 flow [2025-03-08 17:29:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2025-03-08 17:29:22,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2025-03-08 17:29:22,828 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 1105 flow. Second operand 10 states and 85 transitions. [2025-03-08 17:29:22,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 139 transitions, 1747 flow [2025-03-08 17:29:22,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 139 transitions, 1636 flow, removed 13 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:22,845 INFO L231 Difference]: Finished difference. Result has 122 places, 100 transitions, 1124 flow [2025-03-08 17:29:22,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1124, PETRI_PLACES=122, PETRI_TRANSITIONS=100} [2025-03-08 17:29:22,846 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 100 predicate places. [2025-03-08 17:29:22,846 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 100 transitions, 1124 flow [2025-03-08 17:29:22,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:22,846 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:22,846 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:22,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 17:29:23,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:23,048 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:23,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash 952067775, now seen corresponding path program 11 times [2025-03-08 17:29:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424293145] [2025-03-08 17:29:23,048 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:23,055 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:23,087 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:23,087 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:23,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:23,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424293145] [2025-03-08 17:29:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424293145] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135966596] [2025-03-08 17:29:23,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:23,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:23,771 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:23,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:29:23,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:23,922 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:23,923 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:23,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:23,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:29:23,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:24,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:24,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-03-08 17:29:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:24,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:24,222 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:24,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:24,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135966596] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:24,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:24,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 29 [2025-03-08 17:29:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912408514] [2025-03-08 17:29:24,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:24,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:29:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:24,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:29:24,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:29:24,252 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:24,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 100 transitions, 1124 flow. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 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) [2025-03-08 17:29:24,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:24,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:24,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:24,673 INFO L124 PetriNetUnfolderBase]: 296/575 cut-off events. [2025-03-08 17:29:24,673 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2025-03-08 17:29:24,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 575 events. 296/575 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2566 event pairs, 71 based on Foata normal form. 4/579 useless extension candidates. Maximal degree in co-relation 3959. Up to 226 conditions per place. [2025-03-08 17:29:24,678 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 83 selfloop transitions, 42 changer transitions 1/127 dead transitions. [2025-03-08 17:29:24,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 1653 flow [2025-03-08 17:29:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:29:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:29:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2025-03-08 17:29:24,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2025-03-08 17:29:24,679 INFO L175 Difference]: Start difference. First operand has 122 places, 100 transitions, 1124 flow. Second operand 12 states and 98 transitions. [2025-03-08 17:29:24,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 1653 flow [2025-03-08 17:29:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 127 transitions, 1540 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:24,690 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 1133 flow [2025-03-08 17:29:24,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1133, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2025-03-08 17:29:24,691 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2025-03-08 17:29:24,691 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 1133 flow [2025-03-08 17:29:24,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 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) [2025-03-08 17:29:24,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:24,691 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:24,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 17:29:24,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2025-03-08 17:29:24,892 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:24,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2123224340, now seen corresponding path program 12 times [2025-03-08 17:29:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:24,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588506203] [2025-03-08 17:29:24,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:24,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:24,900 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:24,909 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:24,909 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:24,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588506203] [2025-03-08 17:29:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588506203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:25,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348743864] [2025-03-08 17:29:25,196 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:25,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:25,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:25,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:25,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:29:25,274 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:25,296 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:25,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:25,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:25,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:29:25,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:25,389 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 17:29:25,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:29:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:25,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:25,547 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:25,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:29:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348743864] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:25,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-08 17:29:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686311187] [2025-03-08 17:29:25,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:25,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:29:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:25,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:29:25,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:29:25,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:25,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 1133 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:25,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:25,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:25,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:26,139 INFO L124 PetriNetUnfolderBase]: 324/623 cut-off events. [2025-03-08 17:29:26,139 INFO L125 PetriNetUnfolderBase]: For 7754/7754 co-relation queries the response was YES. [2025-03-08 17:29:26,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 623 events. 324/623 cut-off events. For 7754/7754 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2848 event pairs, 42 based on Foata normal form. 5/628 useless extension candidates. Maximal degree in co-relation 4210. Up to 263 conditions per place. [2025-03-08 17:29:26,144 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 103 selfloop transitions, 46 changer transitions 0/150 dead transitions. [2025-03-08 17:29:26,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 150 transitions, 1892 flow [2025-03-08 17:29:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:29:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:29:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2025-03-08 17:29:26,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2025-03-08 17:29:26,145 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 1133 flow. Second operand 16 states and 130 transitions. [2025-03-08 17:29:26,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 150 transitions, 1892 flow [2025-03-08 17:29:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 150 transitions, 1800 flow, removed 4 selfloop flow, removed 10 redundant places. [2025-03-08 17:29:26,158 INFO L231 Difference]: Finished difference. Result has 132 places, 106 transitions, 1225 flow [2025-03-08 17:29:26,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1225, PETRI_PLACES=132, PETRI_TRANSITIONS=106} [2025-03-08 17:29:26,158 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 110 predicate places. [2025-03-08 17:29:26,158 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 106 transitions, 1225 flow [2025-03-08 17:29:26,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:26,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:26,158 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:26,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:26,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:26,359 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:26,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1900909951, now seen corresponding path program 13 times [2025-03-08 17:29:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808839934] [2025-03-08 17:29:26,360 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:26,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:26,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:26,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:26,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:26,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:26,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808839934] [2025-03-08 17:29:26,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808839934] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:26,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372520900] [2025-03-08 17:29:26,716 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:26,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:26,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:26,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:29:26,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:26,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:26,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:26,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:26,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:26,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:26,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:26,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:26,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:27,050 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:27,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372520900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:27,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383609579] [2025-03-08 17:29:27,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:27,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:27,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:27,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:27,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:27,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 106 transitions, 1225 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:27,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:27,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:27,492 INFO L124 PetriNetUnfolderBase]: 325/631 cut-off events. [2025-03-08 17:29:27,492 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2025-03-08 17:29:27,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 631 events. 325/631 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2919 event pairs, 80 based on Foata normal form. 3/634 useless extension candidates. Maximal degree in co-relation 4362. Up to 270 conditions per place. [2025-03-08 17:29:27,497 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 94 selfloop transitions, 35 changer transitions 6/136 dead transitions. [2025-03-08 17:29:27,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 136 transitions, 1762 flow [2025-03-08 17:29:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2025-03-08 17:29:27,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-08 17:29:27,498 INFO L175 Difference]: Start difference. First operand has 132 places, 106 transitions, 1225 flow. Second operand 10 states and 90 transitions. [2025-03-08 17:29:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 136 transitions, 1762 flow [2025-03-08 17:29:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 136 transitions, 1649 flow, removed 18 selfloop flow, removed 15 redundant places. [2025-03-08 17:29:27,512 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 1188 flow [2025-03-08 17:29:27,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1188, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2025-03-08 17:29:27,513 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2025-03-08 17:29:27,513 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 1188 flow [2025-03-08 17:29:27,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:27,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:27,513 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:27,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:27,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:27,714 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:27,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1707713370, now seen corresponding path program 14 times [2025-03-08 17:29:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:27,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678567178] [2025-03-08 17:29:27,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:27,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:27,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:27,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:27,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678567178] [2025-03-08 17:29:28,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678567178] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359614919] [2025-03-08 17:29:28,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:28,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:28,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:29:28,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:28,269 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:28,269 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:28,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:28,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:28,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:28,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:28,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:29:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:28,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:28,474 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:28,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:29:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359614919] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:28,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738242177] [2025-03-08 17:29:28,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:28,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:28,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:28,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:28,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:28,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 1188 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:28,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:28,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:28,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:29,189 INFO L124 PetriNetUnfolderBase]: 350/677 cut-off events. [2025-03-08 17:29:29,189 INFO L125 PetriNetUnfolderBase]: For 8518/8518 co-relation queries the response was YES. [2025-03-08 17:29:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 677 events. 350/677 cut-off events. For 8518/8518 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3180 event pairs, 35 based on Foata normal form. 5/682 useless extension candidates. Maximal degree in co-relation 4637. Up to 242 conditions per place. [2025-03-08 17:29:29,194 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 110 selfloop transitions, 53 changer transitions 2/166 dead transitions. [2025-03-08 17:29:29,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 166 transitions, 2063 flow [2025-03-08 17:29:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:29:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:29:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 154 transitions. [2025-03-08 17:29:29,195 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-03-08 17:29:29,195 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 1188 flow. Second operand 19 states and 154 transitions. [2025-03-08 17:29:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 166 transitions, 2063 flow [2025-03-08 17:29:29,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 166 transitions, 1993 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:29,210 INFO L231 Difference]: Finished difference. Result has 138 places, 111 transitions, 1313 flow [2025-03-08 17:29:29,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1313, PETRI_PLACES=138, PETRI_TRANSITIONS=111} [2025-03-08 17:29:29,210 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 116 predicate places. [2025-03-08 17:29:29,210 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 111 transitions, 1313 flow [2025-03-08 17:29:29,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:29,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:29,211 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:29,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:29,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 17:29:29,415 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:29,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:29,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1686550445, now seen corresponding path program 15 times [2025-03-08 17:29:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:29,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750179362] [2025-03-08 17:29:29,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:29,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:29,422 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:29,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:29,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:29,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750179362] [2025-03-08 17:29:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750179362] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304386731] [2025-03-08 17:29:29,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:29,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:29,749 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:29:29,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:29,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:29,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:29,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:29,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:29,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:29,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:30,046 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:30,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:30,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304386731] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:30,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:30,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:30,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257461318] [2025-03-08 17:29:30,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:30,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:30,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:30,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:30,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:30,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 111 transitions, 1313 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:30,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:30,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:30,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:30,446 INFO L124 PetriNetUnfolderBase]: 343/661 cut-off events. [2025-03-08 17:29:30,446 INFO L125 PetriNetUnfolderBase]: For 8999/8999 co-relation queries the response was YES. [2025-03-08 17:29:30,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 661 events. 343/661 cut-off events. For 8999/8999 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3090 event pairs, 88 based on Foata normal form. 3/664 useless extension candidates. Maximal degree in co-relation 4712. Up to 327 conditions per place. [2025-03-08 17:29:30,451 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 90 selfloop transitions, 34 changer transitions 8/133 dead transitions. [2025-03-08 17:29:30,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 133 transitions, 1772 flow [2025-03-08 17:29:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:29:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:29:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2025-03-08 17:29:30,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2025-03-08 17:29:30,453 INFO L175 Difference]: Start difference. First operand has 138 places, 111 transitions, 1313 flow. Second operand 9 states and 75 transitions. [2025-03-08 17:29:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 133 transitions, 1772 flow [2025-03-08 17:29:30,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 133 transitions, 1622 flow, removed 15 selfloop flow, removed 15 redundant places. [2025-03-08 17:29:30,469 INFO L231 Difference]: Finished difference. Result has 133 places, 111 transitions, 1243 flow [2025-03-08 17:29:30,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1243, PETRI_PLACES=133, PETRI_TRANSITIONS=111} [2025-03-08 17:29:30,469 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2025-03-08 17:29:30,469 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 111 transitions, 1243 flow [2025-03-08 17:29:30,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:30,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:30,470 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:30,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:29:30,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:30,670 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:30,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1633516170, now seen corresponding path program 16 times [2025-03-08 17:29:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293528892] [2025-03-08 17:29:30,671 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:30,679 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:30,690 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:30,690 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:30,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 17:29:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293528892] [2025-03-08 17:29:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293528892] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431063294] [2025-03-08 17:29:31,257 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:31,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:31,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:31,259 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:31,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:29:31,338 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:31,361 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:31,361 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:31,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:31,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:31,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:31,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:31,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:29:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:31,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:31,553 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:31,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:29:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:31,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431063294] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:31,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:31,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2025-03-08 17:29:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782301161] [2025-03-08 17:29:31,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:31,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 17:29:31,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:31,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 17:29:31,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-03-08 17:29:31,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:31,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 111 transitions, 1243 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:31,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:31,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:32,072 INFO L124 PetriNetUnfolderBase]: 334/634 cut-off events. [2025-03-08 17:29:32,073 INFO L125 PetriNetUnfolderBase]: For 8279/8279 co-relation queries the response was YES. [2025-03-08 17:29:32,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 634 events. 334/634 cut-off events. For 8279/8279 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2865 event pairs, 36 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 4403. Up to 234 conditions per place. [2025-03-08 17:29:32,078 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 84 selfloop transitions, 52 changer transitions 2/139 dead transitions. [2025-03-08 17:29:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1797 flow [2025-03-08 17:29:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:29:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:29:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 115 transitions. [2025-03-08 17:29:32,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2025-03-08 17:29:32,079 INFO L175 Difference]: Start difference. First operand has 133 places, 111 transitions, 1243 flow. Second operand 16 states and 115 transitions. [2025-03-08 17:29:32,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1797 flow [2025-03-08 17:29:32,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 1724 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:32,097 INFO L231 Difference]: Finished difference. Result has 137 places, 109 transitions, 1262 flow [2025-03-08 17:29:32,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1262, PETRI_PLACES=137, PETRI_TRANSITIONS=109} [2025-03-08 17:29:32,097 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 115 predicate places. [2025-03-08 17:29:32,097 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 109 transitions, 1262 flow [2025-03-08 17:29:32,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:32,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:32,098 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:32,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:29:32,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:32,298 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:32,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1450991107, now seen corresponding path program 17 times [2025-03-08 17:29:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:32,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7506677] [2025-03-08 17:29:32,299 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:32,308 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:32,342 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:32,342 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:32,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:29:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7506677] [2025-03-08 17:29:32,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7506677] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762052333] [2025-03-08 17:29:32,819 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:32,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:32,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:32,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:29:32,910 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:32,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:32,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:32,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:32,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 17:29:32,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:33,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:29:33,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:29:33,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:33,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2025-03-08 17:29:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 17:29:33,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:33,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762052333] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:33,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:33,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 7] total 28 [2025-03-08 17:29:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949967412] [2025-03-08 17:29:33,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:33,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:29:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:33,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:29:33,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:29:33,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 109 transitions, 1262 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:33,827 INFO L124 PetriNetUnfolderBase]: 341/652 cut-off events. [2025-03-08 17:29:33,827 INFO L125 PetriNetUnfolderBase]: For 8736/8736 co-relation queries the response was YES. [2025-03-08 17:29:33,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4736 conditions, 652 events. 341/652 cut-off events. For 8736/8736 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2974 event pairs, 131 based on Foata normal form. 6/658 useless extension candidates. Maximal degree in co-relation 4641. Up to 525 conditions per place. [2025-03-08 17:29:33,832 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 95 selfloop transitions, 34 changer transitions 5/135 dead transitions. [2025-03-08 17:29:33,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 135 transitions, 1820 flow [2025-03-08 17:29:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:29:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:29:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 113 transitions. [2025-03-08 17:29:33,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3210227272727273 [2025-03-08 17:29:33,833 INFO L175 Difference]: Start difference. First operand has 137 places, 109 transitions, 1262 flow. Second operand 16 states and 113 transitions. [2025-03-08 17:29:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 135 transitions, 1820 flow [2025-03-08 17:29:33,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 1714 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-03-08 17:29:33,847 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1289 flow [2025-03-08 17:29:33,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1289, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2025-03-08 17:29:33,848 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2025-03-08 17:29:33,848 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1289 flow [2025-03-08 17:29:33,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:33,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:33,848 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:33,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:34,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:34,049 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:34,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1394279417, now seen corresponding path program 18 times [2025-03-08 17:29:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518667478] [2025-03-08 17:29:34,049 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:34,057 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:34,065 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:34,066 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:34,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:34,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518667478] [2025-03-08 17:29:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518667478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133958307] [2025-03-08 17:29:34,335 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:34,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:34,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:34,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:34,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:29:34,427 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:34,449 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:34,450 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:34,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:34,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 17:29:34,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:34,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:34,702 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:34,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:34,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133958307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:34,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:34,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-08 17:29:34,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6070679] [2025-03-08 17:29:34,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:34,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:29:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:34,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:29:34,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:29:34,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:34,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1289 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:34,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:34,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:34,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:35,084 INFO L124 PetriNetUnfolderBase]: 329/629 cut-off events. [2025-03-08 17:29:35,084 INFO L125 PetriNetUnfolderBase]: For 9542/9542 co-relation queries the response was YES. [2025-03-08 17:29:35,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 629 events. 329/629 cut-off events. For 9542/9542 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2854 event pairs, 124 based on Foata normal form. 6/635 useless extension candidates. Maximal degree in co-relation 4477. Up to 500 conditions per place. [2025-03-08 17:29:35,089 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 106 selfloop transitions, 25 changer transitions 7/139 dead transitions. [2025-03-08 17:29:35,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1816 flow [2025-03-08 17:29:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:29:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:29:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2025-03-08 17:29:35,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33916083916083917 [2025-03-08 17:29:35,090 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1289 flow. Second operand 13 states and 97 transitions. [2025-03-08 17:29:35,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1816 flow [2025-03-08 17:29:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 139 transitions, 1703 flow, removed 16 selfloop flow, removed 14 redundant places. [2025-03-08 17:29:35,107 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1240 flow [2025-03-08 17:29:35,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1240, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2025-03-08 17:29:35,108 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2025-03-08 17:29:35,108 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1240 flow [2025-03-08 17:29:35,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:35,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:35,109 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:35,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:35,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 17:29:35,313 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:35,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash 706233048, now seen corresponding path program 19 times [2025-03-08 17:29:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:35,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6043652] [2025-03-08 17:29:35,314 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:35,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:35,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:35,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:35,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:35,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:35,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6043652] [2025-03-08 17:29:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6043652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699869787] [2025-03-08 17:29:35,685 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:35,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:35,688 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:35,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:29:35,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:35,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:35,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:35,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:35,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:35,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:35,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:35,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:35,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:35,997 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:35,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699869787] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:36,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:29:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203766193] [2025-03-08 17:29:36,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:36,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:29:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:36,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:29:36,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:29:36,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:36,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1240 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:36,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:36,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:36,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:36,293 INFO L124 PetriNetUnfolderBase]: 335/642 cut-off events. [2025-03-08 17:29:36,293 INFO L125 PetriNetUnfolderBase]: For 9864/9864 co-relation queries the response was YES. [2025-03-08 17:29:36,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 642 events. 335/642 cut-off events. For 9864/9864 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2929 event pairs, 135 based on Foata normal form. 5/647 useless extension candidates. Maximal degree in co-relation 4559. Up to 534 conditions per place. [2025-03-08 17:29:36,297 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2025-03-08 17:29:36,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 126 transitions, 1634 flow [2025-03-08 17:29:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:29:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:29:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2025-03-08 17:29:36,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2025-03-08 17:29:36,298 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1240 flow. Second operand 9 states and 71 transitions. [2025-03-08 17:29:36,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 126 transitions, 1634 flow [2025-03-08 17:29:36,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 126 transitions, 1585 flow, removed 2 selfloop flow, removed 9 redundant places. [2025-03-08 17:29:36,314 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1276 flow [2025-03-08 17:29:36,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1276, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2025-03-08 17:29:36,314 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 115 predicate places. [2025-03-08 17:29:36,314 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1276 flow [2025-03-08 17:29:36,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:36,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:36,315 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:36,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:36,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 17:29:36,515 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:36,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1093483490, now seen corresponding path program 20 times [2025-03-08 17:29:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849215404] [2025-03-08 17:29:36,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:36,522 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:36,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:36,534 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:36,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849215404] [2025-03-08 17:29:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849215404] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896713298] [2025-03-08 17:29:36,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:36,881 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:36,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:29:36,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:36,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:36,993 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:36,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:36,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:29:36,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:37,123 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 17:29:37,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:29:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:37,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:37,373 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:37,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896713298] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:37,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-03-08 17:29:37,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228566573] [2025-03-08 17:29:37,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:37,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 17:29:37,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:37,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 17:29:37,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2025-03-08 17:29:37,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:37,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1276 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:37,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:37,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:37,930 INFO L124 PetriNetUnfolderBase]: 351/671 cut-off events. [2025-03-08 17:29:37,930 INFO L125 PetriNetUnfolderBase]: For 10556/10556 co-relation queries the response was YES. [2025-03-08 17:29:37,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 671 events. 351/671 cut-off events. For 10556/10556 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3100 event pairs, 47 based on Foata normal form. 8/679 useless extension candidates. Maximal degree in co-relation 4871. Up to 551 conditions per place. [2025-03-08 17:29:37,934 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 110 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2025-03-08 17:29:37,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 140 transitions, 1813 flow [2025-03-08 17:29:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:29:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:29:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2025-03-08 17:29:37,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32792207792207795 [2025-03-08 17:29:37,935 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1276 flow. Second operand 14 states and 101 transitions. [2025-03-08 17:29:37,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 140 transitions, 1813 flow [2025-03-08 17:29:37,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 140 transitions, 1751 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:37,954 INFO L231 Difference]: Finished difference. Result has 146 places, 118 transitions, 1403 flow [2025-03-08 17:29:37,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1403, PETRI_PLACES=146, PETRI_TRANSITIONS=118} [2025-03-08 17:29:37,954 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2025-03-08 17:29:37,954 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 118 transitions, 1403 flow [2025-03-08 17:29:37,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:37,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:37,955 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:37,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 17:29:38,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 17:29:38,155 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:38,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1389661184, now seen corresponding path program 21 times [2025-03-08 17:29:38,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:38,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452430085] [2025-03-08 17:29:38,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:38,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:38,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:38,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:38,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452430085] [2025-03-08 17:29:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452430085] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:38,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224425964] [2025-03-08 17:29:38,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:38,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:38,535 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:38,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 17:29:38,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:38,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:38,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:38,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:38,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:38,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:38,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:38,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:29:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:38,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:38,823 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:38,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224425964] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:38,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:38,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:38,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865629367] [2025-03-08 17:29:38,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:38,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:38,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:38,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:38,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:38,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 118 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:38,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:38,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:39,227 INFO L124 PetriNetUnfolderBase]: 349/669 cut-off events. [2025-03-08 17:29:39,227 INFO L125 PetriNetUnfolderBase]: For 11792/11792 co-relation queries the response was YES. [2025-03-08 17:29:39,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5133 conditions, 669 events. 349/669 cut-off events. For 11792/11792 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3084 event pairs, 129 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 5036. Up to 544 conditions per place. [2025-03-08 17:29:39,231 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 106 selfloop transitions, 27 changer transitions 2/136 dead transitions. [2025-03-08 17:29:39,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 136 transitions, 1826 flow [2025-03-08 17:29:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:29:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:29:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2025-03-08 17:29:39,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34297520661157027 [2025-03-08 17:29:39,232 INFO L175 Difference]: Start difference. First operand has 146 places, 118 transitions, 1403 flow. Second operand 11 states and 83 transitions. [2025-03-08 17:29:39,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 136 transitions, 1826 flow [2025-03-08 17:29:39,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1714 flow, removed 39 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:39,254 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 1327 flow [2025-03-08 17:29:39,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1327, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2025-03-08 17:29:39,254 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2025-03-08 17:29:39,254 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 1327 flow [2025-03-08 17:29:39,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:39,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:39,254 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:39,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:39,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:39,455 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:39,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash 168377470, now seen corresponding path program 22 times [2025-03-08 17:29:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:39,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165950432] [2025-03-08 17:29:39,456 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:39,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:39,462 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:39,472 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:39,472 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:39,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:39,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165950432] [2025-03-08 17:29:39,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165950432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660564099] [2025-03-08 17:29:39,796 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:39,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:39,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:39,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:39,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 17:29:39,893 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:39,916 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:39,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:39,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:39,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:39,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:39,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:39,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:40,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:40,103 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:40,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660564099] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:40,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:40,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:29:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977554619] [2025-03-08 17:29:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:40,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:29:40,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:40,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:29:40,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:29:40,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:40,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 1327 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:40,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:40,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:40,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:40,407 INFO L124 PetriNetUnfolderBase]: 353/663 cut-off events. [2025-03-08 17:29:40,407 INFO L125 PetriNetUnfolderBase]: For 12620/12620 co-relation queries the response was YES. [2025-03-08 17:29:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 663 events. 353/663 cut-off events. For 12620/12620 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3049 event pairs, 128 based on Foata normal form. 7/670 useless extension candidates. Maximal degree in co-relation 5040. Up to 526 conditions per place. [2025-03-08 17:29:40,411 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2025-03-08 17:29:40,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 133 transitions, 1790 flow [2025-03-08 17:29:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:29:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:29:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2025-03-08 17:29:40,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34297520661157027 [2025-03-08 17:29:40,412 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 1327 flow. Second operand 11 states and 83 transitions. [2025-03-08 17:29:40,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 133 transitions, 1790 flow [2025-03-08 17:29:40,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 133 transitions, 1726 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-03-08 17:29:40,432 INFO L231 Difference]: Finished difference. Result has 144 places, 114 transitions, 1379 flow [2025-03-08 17:29:40,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1379, PETRI_PLACES=144, PETRI_TRANSITIONS=114} [2025-03-08 17:29:40,432 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2025-03-08 17:29:40,432 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 114 transitions, 1379 flow [2025-03-08 17:29:40,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:40,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:40,433 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:40,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 17:29:40,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:40,633 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:40,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2064378688, now seen corresponding path program 23 times [2025-03-08 17:29:40,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:40,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422208907] [2025-03-08 17:29:40,634 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:40,641 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:40,654 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:40,655 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:40,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:29:40,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:40,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422208907] [2025-03-08 17:29:40,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422208907] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:40,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075140136] [2025-03-08 17:29:40,986 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:40,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:40,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:40,988 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:40,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 17:29:41,096 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:41,145 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:41,145 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:41,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:41,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:29:41,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:41,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:41,374 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:41,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075140136] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:41,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-08 17:29:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398606010] [2025-03-08 17:29:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:41,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:41,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:41,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:41,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:41,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 114 transitions, 1379 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:41,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:41,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:41,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:41,719 INFO L124 PetriNetUnfolderBase]: 349/651 cut-off events. [2025-03-08 17:29:41,719 INFO L125 PetriNetUnfolderBase]: For 13166/13166 co-relation queries the response was YES. [2025-03-08 17:29:41,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5147 conditions, 651 events. 349/651 cut-off events. For 13166/13166 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2929 event pairs, 141 based on Foata normal form. 2/653 useless extension candidates. Maximal degree in co-relation 5051. Up to 574 conditions per place. [2025-03-08 17:29:41,723 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 96 selfloop transitions, 21 changer transitions 4/122 dead transitions. [2025-03-08 17:29:41,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 122 transitions, 1685 flow [2025-03-08 17:29:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 68 transitions. [2025-03-08 17:29:41,724 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3090909090909091 [2025-03-08 17:29:41,724 INFO L175 Difference]: Start difference. First operand has 144 places, 114 transitions, 1379 flow. Second operand 10 states and 68 transitions. [2025-03-08 17:29:41,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 122 transitions, 1685 flow [2025-03-08 17:29:41,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 122 transitions, 1598 flow, removed 18 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:41,748 INFO L231 Difference]: Finished difference. Result has 145 places, 111 transitions, 1307 flow [2025-03-08 17:29:41,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1307, PETRI_PLACES=145, PETRI_TRANSITIONS=111} [2025-03-08 17:29:41,748 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2025-03-08 17:29:41,748 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 111 transitions, 1307 flow [2025-03-08 17:29:41,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:41,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:41,749 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:41,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 17:29:41,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-08 17:29:41,949 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:41,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash 480392447, now seen corresponding path program 24 times [2025-03-08 17:29:41,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758978447] [2025-03-08 17:29:41,950 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:41,957 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:41,972 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:41,972 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 17:29:41,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:42,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758978447] [2025-03-08 17:29:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758978447] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414318834] [2025-03-08 17:29:42,317 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:42,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 17:29:42,421 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:42,449 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:42,449 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 17:29:42,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:42,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 17:29:42,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:42,594 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-08 17:29:42,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:29:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:42,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:42,759 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:42,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414318834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:42,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:42,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2025-03-08 17:29:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579866841] [2025-03-08 17:29:42,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:42,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:42,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:42,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:42,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:42,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 111 transitions, 1307 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:42,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:42,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:43,256 INFO L124 PetriNetUnfolderBase]: 366/678 cut-off events. [2025-03-08 17:29:43,256 INFO L125 PetriNetUnfolderBase]: For 12840/12840 co-relation queries the response was YES. [2025-03-08 17:29:43,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 678 events. 366/678 cut-off events. For 12840/12840 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3074 event pairs, 131 based on Foata normal form. 10/688 useless extension candidates. Maximal degree in co-relation 5231. Up to 570 conditions per place. [2025-03-08 17:29:43,261 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 106 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2025-03-08 17:29:43,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 140 transitions, 1971 flow [2025-03-08 17:29:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:29:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:29:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 107 transitions. [2025-03-08 17:29:43,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3242424242424242 [2025-03-08 17:29:43,262 INFO L175 Difference]: Start difference. First operand has 145 places, 111 transitions, 1307 flow. Second operand 15 states and 107 transitions. [2025-03-08 17:29:43,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 140 transitions, 1971 flow [2025-03-08 17:29:43,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 1925 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:43,284 INFO L231 Difference]: Finished difference. Result has 152 places, 120 transitions, 1537 flow [2025-03-08 17:29:43,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1537, PETRI_PLACES=152, PETRI_TRANSITIONS=120} [2025-03-08 17:29:43,284 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2025-03-08 17:29:43,284 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 120 transitions, 1537 flow [2025-03-08 17:29:43,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:43,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:43,285 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:43,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 17:29:43,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-03-08 17:29:43,485 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:43,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash -843106315, now seen corresponding path program 25 times [2025-03-08 17:29:43,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:43,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569666903] [2025-03-08 17:29:43,486 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:43,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:43,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:43,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:43,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:43,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:43,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569666903] [2025-03-08 17:29:43,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569666903] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33461612] [2025-03-08 17:29:43,799 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:43,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:43,801 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:43,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 17:29:43,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:43,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:43,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:43,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:43,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:43,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:43,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:43,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:44,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:44,141 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:44,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33461612] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:44,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:44,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:29:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176100564] [2025-03-08 17:29:44,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:44,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:29:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:44,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:29:44,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:29:44,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:44,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 120 transitions, 1537 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:44,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:44,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:44,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:44,492 INFO L124 PetriNetUnfolderBase]: 367/674 cut-off events. [2025-03-08 17:29:44,492 INFO L125 PetriNetUnfolderBase]: For 13945/13945 co-relation queries the response was YES. [2025-03-08 17:29:44,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 674 events. 367/674 cut-off events. For 13945/13945 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3024 event pairs, 134 based on Foata normal form. 4/678 useless extension candidates. Maximal degree in co-relation 5444. Up to 560 conditions per place. [2025-03-08 17:29:44,497 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 29 changer transitions 0/137 dead transitions. [2025-03-08 17:29:44,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 137 transitions, 2089 flow [2025-03-08 17:29:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:29:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:29:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 80 transitions. [2025-03-08 17:29:44,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2025-03-08 17:29:44,498 INFO L175 Difference]: Start difference. First operand has 152 places, 120 transitions, 1537 flow. Second operand 11 states and 80 transitions. [2025-03-08 17:29:44,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 137 transitions, 2089 flow [2025-03-08 17:29:44,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 137 transitions, 1922 flow, removed 64 selfloop flow, removed 11 redundant places. [2025-03-08 17:29:44,522 INFO L231 Difference]: Finished difference. Result has 151 places, 121 transitions, 1469 flow [2025-03-08 17:29:44,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1469, PETRI_PLACES=151, PETRI_TRANSITIONS=121} [2025-03-08 17:29:44,523 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-03-08 17:29:44,523 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 121 transitions, 1469 flow [2025-03-08 17:29:44,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:44,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:44,523 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:44,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-08 17:29:44,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:44,724 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:44,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -77563729, now seen corresponding path program 26 times [2025-03-08 17:29:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:44,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301875421] [2025-03-08 17:29:44,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:44,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:44,731 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:44,741 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:44,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:44,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:45,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:45,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301875421] [2025-03-08 17:29:45,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301875421] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:45,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112050601] [2025-03-08 17:29:45,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:45,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:45,084 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:45,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 17:29:45,194 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:45,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:45,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:45,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:45,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:45,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:45,365 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:45,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:45,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112050601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:45,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:45,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:45,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862563927] [2025-03-08 17:29:45,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:45,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:45,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:45,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:45,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:45,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 121 transitions, 1469 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:45,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:45,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:45,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:45,689 INFO L124 PetriNetUnfolderBase]: 364/671 cut-off events. [2025-03-08 17:29:45,689 INFO L125 PetriNetUnfolderBase]: For 14803/14803 co-relation queries the response was YES. [2025-03-08 17:29:45,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5434 conditions, 671 events. 364/671 cut-off events. For 14803/14803 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3027 event pairs, 134 based on Foata normal form. 3/674 useless extension candidates. Maximal degree in co-relation 5336. Up to 567 conditions per place. [2025-03-08 17:29:45,694 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 22 changer transitions 8/135 dead transitions. [2025-03-08 17:29:45,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 135 transitions, 1863 flow [2025-03-08 17:29:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:29:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:29:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2025-03-08 17:29:45,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-08 17:29:45,696 INFO L175 Difference]: Start difference. First operand has 151 places, 121 transitions, 1469 flow. Second operand 9 states and 66 transitions. [2025-03-08 17:29:45,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 135 transitions, 1863 flow [2025-03-08 17:29:45,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 135 transitions, 1799 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-03-08 17:29:45,719 INFO L231 Difference]: Finished difference. Result has 152 places, 121 transitions, 1456 flow [2025-03-08 17:29:45,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1456, PETRI_PLACES=152, PETRI_TRANSITIONS=121} [2025-03-08 17:29:45,720 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2025-03-08 17:29:45,720 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 121 transitions, 1456 flow [2025-03-08 17:29:45,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:45,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:45,720 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:45,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:45,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:45,921 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:45,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash 322662635, now seen corresponding path program 27 times [2025-03-08 17:29:45,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:45,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305144567] [2025-03-08 17:29:45,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:45,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:45,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:45,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:45,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:46,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:46,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305144567] [2025-03-08 17:29:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305144567] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361396309] [2025-03-08 17:29:46,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:46,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:46,202 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:46,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-08 17:29:46,306 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:46,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:29:46,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:46,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:46,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:29:46,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:46,435 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 17:29:46,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:29:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:46,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:46,637 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:46,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361396309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:46,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-03-08 17:29:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546398488] [2025-03-08 17:29:46,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:46,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:46,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:46,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:46,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:46,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 121 transitions, 1456 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:46,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:46,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:46,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:47,103 INFO L124 PetriNetUnfolderBase]: 378/689 cut-off events. [2025-03-08 17:29:47,103 INFO L125 PetriNetUnfolderBase]: For 15311/15311 co-relation queries the response was YES. [2025-03-08 17:29:47,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5723 conditions, 689 events. 378/689 cut-off events. For 15311/15311 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3110 event pairs, 95 based on Foata normal form. 6/695 useless extension candidates. Maximal degree in co-relation 5643. Up to 560 conditions per place. [2025-03-08 17:29:47,107 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 112 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2025-03-08 17:29:47,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 146 transitions, 2133 flow [2025-03-08 17:29:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:29:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:29:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 97 transitions. [2025-03-08 17:29:47,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31493506493506496 [2025-03-08 17:29:47,107 INFO L175 Difference]: Start difference. First operand has 152 places, 121 transitions, 1456 flow. Second operand 14 states and 97 transitions. [2025-03-08 17:29:47,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 146 transitions, 2133 flow [2025-03-08 17:29:47,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 146 transitions, 2083 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:47,129 INFO L231 Difference]: Finished difference. Result has 159 places, 128 transitions, 1657 flow [2025-03-08 17:29:47,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1657, PETRI_PLACES=159, PETRI_TRANSITIONS=128} [2025-03-08 17:29:47,129 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 137 predicate places. [2025-03-08 17:29:47,129 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 128 transitions, 1657 flow [2025-03-08 17:29:47,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:47,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:47,129 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:47,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:47,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:47,330 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:47,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash -284385783, now seen corresponding path program 28 times [2025-03-08 17:29:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001760086] [2025-03-08 17:29:47,331 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:47,338 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:47,348 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:47,348 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:47,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001760086] [2025-03-08 17:29:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001760086] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369223508] [2025-03-08 17:29:47,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:47,651 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:47,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-08 17:29:47,768 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:47,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:47,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:47,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:29:47,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:47,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:47,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:29:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:47,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:47,977 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:29:47,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:29:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369223508] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:47,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:47,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:47,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890326995] [2025-03-08 17:29:47,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:47,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:47,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:47,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:47,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:47,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:47,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 128 transitions, 1657 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:47,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:47,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:47,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:48,531 INFO L124 PetriNetUnfolderBase]: 402/739 cut-off events. [2025-03-08 17:29:48,531 INFO L125 PetriNetUnfolderBase]: For 19167/19167 co-relation queries the response was YES. [2025-03-08 17:29:48,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 739 events. 402/739 cut-off events. For 19167/19167 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3414 event pairs, 28 based on Foata normal form. 4/743 useless extension candidates. Maximal degree in co-relation 6365. Up to 290 conditions per place. [2025-03-08 17:29:48,548 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 118 selfloop transitions, 56 changer transitions 3/178 dead transitions. [2025-03-08 17:29:48,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 178 transitions, 2871 flow [2025-03-08 17:29:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:29:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:29:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 127 transitions. [2025-03-08 17:29:48,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2025-03-08 17:29:48,549 INFO L175 Difference]: Start difference. First operand has 159 places, 128 transitions, 1657 flow. Second operand 16 states and 127 transitions. [2025-03-08 17:29:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 178 transitions, 2871 flow [2025-03-08 17:29:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 178 transitions, 2728 flow, removed 55 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:48,580 INFO L231 Difference]: Finished difference. Result has 170 places, 133 transitions, 1799 flow [2025-03-08 17:29:48,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1799, PETRI_PLACES=170, PETRI_TRANSITIONS=133} [2025-03-08 17:29:48,581 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-03-08 17:29:48,581 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 133 transitions, 1799 flow [2025-03-08 17:29:48,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:48,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:48,581 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:48,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-08 17:29:48,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-08 17:29:48,782 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:48,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash -751574872, now seen corresponding path program 29 times [2025-03-08 17:29:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:48,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142453051] [2025-03-08 17:29:48,782 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:48,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:48,790 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:48,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:48,804 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:48,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:29:49,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142453051] [2025-03-08 17:29:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142453051] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847943105] [2025-03-08 17:29:49,108 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:49,110 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:49,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-08 17:29:49,227 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:49,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:49,329 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:49,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:29:49,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:49,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:49,522 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:49,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:49,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847943105] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:49,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:49,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-08 17:29:49,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738928231] [2025-03-08 17:29:49,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:49,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:49,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:49,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:49,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:49,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 133 transitions, 1799 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:49,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:49,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:49,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:49,828 INFO L124 PetriNetUnfolderBase]: 403/748 cut-off events. [2025-03-08 17:29:49,828 INFO L125 PetriNetUnfolderBase]: For 21153/21153 co-relation queries the response was YES. [2025-03-08 17:29:49,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6667 conditions, 748 events. 403/748 cut-off events. For 21153/21153 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3530 event pairs, 80 based on Foata normal form. 2/750 useless extension candidates. Maximal degree in co-relation 6561. Up to 397 conditions per place. [2025-03-08 17:29:49,833 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 104 selfloop transitions, 49 changer transitions 10/164 dead transitions. [2025-03-08 17:29:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 164 transitions, 2528 flow [2025-03-08 17:29:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2025-03-08 17:29:49,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2025-03-08 17:29:49,834 INFO L175 Difference]: Start difference. First operand has 170 places, 133 transitions, 1799 flow. Second operand 10 states and 77 transitions. [2025-03-08 17:29:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 164 transitions, 2528 flow [2025-03-08 17:29:49,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 164 transitions, 2287 flow, removed 41 selfloop flow, removed 13 redundant places. [2025-03-08 17:29:49,867 INFO L231 Difference]: Finished difference. Result has 170 places, 134 transitions, 1765 flow [2025-03-08 17:29:49,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1765, PETRI_PLACES=170, PETRI_TRANSITIONS=134} [2025-03-08 17:29:49,867 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-03-08 17:29:49,867 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 134 transitions, 1765 flow [2025-03-08 17:29:49,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:49,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:49,867 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:49,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:50,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-08 17:29:50,068 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:50,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1983263475, now seen corresponding path program 30 times [2025-03-08 17:29:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:50,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328341870] [2025-03-08 17:29:50,069 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:50,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:50,090 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:50,090 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 17:29:50,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:50,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:50,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328341870] [2025-03-08 17:29:50,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328341870] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:50,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480422281] [2025-03-08 17:29:50,419 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:50,421 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:50,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-08 17:29:50,539 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:50,565 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:50,565 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 17:29:50,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:50,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-08 17:29:50,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:50,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:50,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-03-08 17:29:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:50,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:50,837 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:50,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:50,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480422281] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:50,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:50,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-03-08 17:29:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58574130] [2025-03-08 17:29:50,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:50,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:29:50,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:50,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:29:50,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:29:50,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:50,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 134 transitions, 1765 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:50,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:50,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:51,602 INFO L124 PetriNetUnfolderBase]: 437/845 cut-off events. [2025-03-08 17:29:51,602 INFO L125 PetriNetUnfolderBase]: For 24788/24788 co-relation queries the response was YES. [2025-03-08 17:29:51,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 845 events. 437/845 cut-off events. For 24788/24788 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4252 event pairs, 139 based on Foata normal form. 13/858 useless extension candidates. Maximal degree in co-relation 7459. Up to 600 conditions per place. [2025-03-08 17:29:51,608 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 158 selfloop transitions, 44 changer transitions 4/207 dead transitions. [2025-03-08 17:29:51,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 207 transitions, 3114 flow [2025-03-08 17:29:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:29:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:29:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 170 transitions. [2025-03-08 17:29:51,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2025-03-08 17:29:51,609 INFO L175 Difference]: Start difference. First operand has 170 places, 134 transitions, 1765 flow. Second operand 21 states and 170 transitions. [2025-03-08 17:29:51,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 207 transitions, 3114 flow [2025-03-08 17:29:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 207 transitions, 2907 flow, removed 75 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:51,652 INFO L231 Difference]: Finished difference. Result has 187 places, 147 transitions, 2076 flow [2025-03-08 17:29:51,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2076, PETRI_PLACES=187, PETRI_TRANSITIONS=147} [2025-03-08 17:29:51,653 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2025-03-08 17:29:51,653 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 147 transitions, 2076 flow [2025-03-08 17:29:51,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:51,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:51,653 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:51,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-08 17:29:51,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-08 17:29:51,853 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:51,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2044598509, now seen corresponding path program 31 times [2025-03-08 17:29:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325191966] [2025-03-08 17:29:51,854 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:51,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:51,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:51,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:51,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325191966] [2025-03-08 17:29:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325191966] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653942547] [2025-03-08 17:29:52,188 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:29:52,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:52,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-08 17:29:52,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:52,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:52,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:52,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:52,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:52,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:52,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:52,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:52,570 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:52,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:52,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653942547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:52,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:52,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986642367] [2025-03-08 17:29:52,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:52,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:52,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:52,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:52,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:52,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 147 transitions, 2076 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:52,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:52,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:52,957 INFO L124 PetriNetUnfolderBase]: 427/831 cut-off events. [2025-03-08 17:29:52,958 INFO L125 PetriNetUnfolderBase]: For 19744/19744 co-relation queries the response was YES. [2025-03-08 17:29:52,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7105 conditions, 831 events. 427/831 cut-off events. For 19744/19744 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4181 event pairs, 147 based on Foata normal form. 6/837 useless extension candidates. Maximal degree in co-relation 6995. Up to 651 conditions per place. [2025-03-08 17:29:52,965 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 130 selfloop transitions, 35 changer transitions 6/172 dead transitions. [2025-03-08 17:29:52,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 172 transitions, 2787 flow [2025-03-08 17:29:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:29:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:29:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2025-03-08 17:29:52,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-03-08 17:29:52,966 INFO L175 Difference]: Start difference. First operand has 187 places, 147 transitions, 2076 flow. Second operand 12 states and 92 transitions. [2025-03-08 17:29:52,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 172 transitions, 2787 flow [2025-03-08 17:29:53,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 172 transitions, 2499 flow, removed 124 selfloop flow, removed 9 redundant places. [2025-03-08 17:29:53,008 INFO L231 Difference]: Finished difference. Result has 191 places, 148 transitions, 1903 flow [2025-03-08 17:29:53,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1903, PETRI_PLACES=191, PETRI_TRANSITIONS=148} [2025-03-08 17:29:53,009 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 169 predicate places. [2025-03-08 17:29:53,009 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 148 transitions, 1903 flow [2025-03-08 17:29:53,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:53,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:53,009 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:53,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:53,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-08 17:29:53,210 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:53,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1270861412, now seen corresponding path program 32 times [2025-03-08 17:29:53,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:53,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972765536] [2025-03-08 17:29:53,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:53,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:53,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:53,226 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:53,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:53,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972765536] [2025-03-08 17:29:53,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972765536] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703039104] [2025-03-08 17:29:53,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:53,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:53,581 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:53,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-08 17:29:53,693 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:53,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:53,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:53,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:53,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:53,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:53,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:53,914 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:53,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:53,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703039104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:53,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:29:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274715451] [2025-03-08 17:29:53,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:53,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:29:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:53,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:29:53,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:29:53,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:53,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 148 transitions, 1903 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:53,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:53,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:54,309 INFO L124 PetriNetUnfolderBase]: 418/812 cut-off events. [2025-03-08 17:29:54,310 INFO L125 PetriNetUnfolderBase]: For 17137/17137 co-relation queries the response was YES. [2025-03-08 17:29:54,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 812 events. 418/812 cut-off events. For 17137/17137 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4018 event pairs, 98 based on Foata normal form. 2/814 useless extension candidates. Maximal degree in co-relation 6461. Up to 450 conditions per place. [2025-03-08 17:29:54,316 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 47 changer transitions 7/166 dead transitions. [2025-03-08 17:29:54,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 166 transitions, 2400 flow [2025-03-08 17:29:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:29:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:29:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2025-03-08 17:29:54,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2025-03-08 17:29:54,316 INFO L175 Difference]: Start difference. First operand has 191 places, 148 transitions, 1903 flow. Second operand 9 states and 71 transitions. [2025-03-08 17:29:54,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 166 transitions, 2400 flow [2025-03-08 17:29:54,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 166 transitions, 2241 flow, removed 33 selfloop flow, removed 18 redundant places. [2025-03-08 17:29:54,351 INFO L231 Difference]: Finished difference. Result has 182 places, 148 transitions, 1850 flow [2025-03-08 17:29:54,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1850, PETRI_PLACES=182, PETRI_TRANSITIONS=148} [2025-03-08 17:29:54,352 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2025-03-08 17:29:54,352 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 148 transitions, 1850 flow [2025-03-08 17:29:54,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:54,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:54,352 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:54,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-08 17:29:54,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:54,552 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:54,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1966417162, now seen corresponding path program 33 times [2025-03-08 17:29:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621544587] [2025-03-08 17:29:54,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:54,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:54,568 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 28 statements. [2025-03-08 17:29:54,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:29:54,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621544587] [2025-03-08 17:29:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621544587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138874458] [2025-03-08 17:29:54,935 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:54,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:54,936 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:54,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-08 17:29:55,052 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:55,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 28 statements. [2025-03-08 17:29:55,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:29:55,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:55,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 17:29:55,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:55,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:55,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2025-03-08 17:29:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:55,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:55,454 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:55,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138874458] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:55,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:55,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-03-08 17:29:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631351738] [2025-03-08 17:29:55,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:55,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:55,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:55,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:55,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:55,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 148 transitions, 1850 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:55,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:55,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:55,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:56,265 INFO L124 PetriNetUnfolderBase]: 446/877 cut-off events. [2025-03-08 17:29:56,265 INFO L125 PetriNetUnfolderBase]: For 19117/19117 co-relation queries the response was YES. [2025-03-08 17:29:56,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 877 events. 446/877 cut-off events. For 19117/19117 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4503 event pairs, 94 based on Foata normal form. 11/888 useless extension candidates. Maximal degree in co-relation 6965. Up to 682 conditions per place. [2025-03-08 17:29:56,272 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 151 selfloop transitions, 38 changer transitions 4/194 dead transitions. [2025-03-08 17:29:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 194 transitions, 2715 flow [2025-03-08 17:29:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:29:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:29:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 138 transitions. [2025-03-08 17:29:56,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-03-08 17:29:56,273 INFO L175 Difference]: Start difference. First operand has 182 places, 148 transitions, 1850 flow. Second operand 18 states and 138 transitions. [2025-03-08 17:29:56,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 194 transitions, 2715 flow [2025-03-08 17:29:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 194 transitions, 2584 flow, removed 9 selfloop flow, removed 8 redundant places. [2025-03-08 17:29:56,304 INFO L231 Difference]: Finished difference. Result has 194 places, 154 transitions, 1994 flow [2025-03-08 17:29:56,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1994, PETRI_PLACES=194, PETRI_TRANSITIONS=154} [2025-03-08 17:29:56,304 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2025-03-08 17:29:56,304 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 154 transitions, 1994 flow [2025-03-08 17:29:56,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:56,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:56,304 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:56,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-08 17:29:56,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2025-03-08 17:29:56,505 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:56,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1378240112, now seen corresponding path program 34 times [2025-03-08 17:29:56,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796404755] [2025-03-08 17:29:56,506 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:56,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:56,513 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:56,524 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:56,524 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:56,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:56,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796404755] [2025-03-08 17:29:56,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796404755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198887999] [2025-03-08 17:29:56,784 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:56,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:56,786 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:56,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-08 17:29:56,901 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:29:56,924 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:56,924 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:56,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:56,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:29:56,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:56,974 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 17:29:56,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:29:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:56,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:57,063 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:57,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:29:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198887999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:57,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:29:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840043728] [2025-03-08 17:29:57,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:57,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:29:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:57,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:29:57,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:29:57,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:57,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 154 transitions, 1994 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:57,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:57,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:57,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:57,338 INFO L124 PetriNetUnfolderBase]: 448/877 cut-off events. [2025-03-08 17:29:57,338 INFO L125 PetriNetUnfolderBase]: For 20245/20245 co-relation queries the response was YES. [2025-03-08 17:29:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7211 conditions, 877 events. 448/877 cut-off events. For 20245/20245 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4475 event pairs, 172 based on Foata normal form. 5/882 useless extension candidates. Maximal degree in co-relation 7104. Up to 764 conditions per place. [2025-03-08 17:29:57,344 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 145 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2025-03-08 17:29:57,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 169 transitions, 2498 flow [2025-03-08 17:29:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:29:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:29:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2025-03-08 17:29:57,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2025-03-08 17:29:57,345 INFO L175 Difference]: Start difference. First operand has 194 places, 154 transitions, 1994 flow. Second operand 9 states and 68 transitions. [2025-03-08 17:29:57,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 169 transitions, 2498 flow [2025-03-08 17:29:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 169 transitions, 2350 flow, removed 51 selfloop flow, removed 11 redundant places. [2025-03-08 17:29:57,379 INFO L231 Difference]: Finished difference. Result has 192 places, 155 transitions, 1933 flow [2025-03-08 17:29:57,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1933, PETRI_PLACES=192, PETRI_TRANSITIONS=155} [2025-03-08 17:29:57,379 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2025-03-08 17:29:57,379 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 155 transitions, 1933 flow [2025-03-08 17:29:57,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:57,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:57,379 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:57,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-03-08 17:29:57,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:57,580 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:57,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1099812234, now seen corresponding path program 35 times [2025-03-08 17:29:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:57,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122414243] [2025-03-08 17:29:57,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:57,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:57,588 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:57,602 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:57,602 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:57,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:29:57,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:57,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122414243] [2025-03-08 17:29:57,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122414243] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:57,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074210933] [2025-03-08 17:29:57,910 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:57,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:57,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:57,912 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:57,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-08 17:29:58,031 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:58,163 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:58,164 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:29:58,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:58,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:29:58,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:58,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:58,367 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:29:58,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:29:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074210933] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:58,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-08 17:29:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447562532] [2025-03-08 17:29:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:58,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:29:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:58,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:29:58,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:29:58,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:58,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 155 transitions, 1933 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:58,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:58,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:58,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:58,674 INFO L124 PetriNetUnfolderBase]: 442/855 cut-off events. [2025-03-08 17:29:58,674 INFO L125 PetriNetUnfolderBase]: For 19039/19039 co-relation queries the response was YES. [2025-03-08 17:29:58,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6946 conditions, 855 events. 442/855 cut-off events. For 19039/19039 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4314 event pairs, 167 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 6839. Up to 747 conditions per place. [2025-03-08 17:29:58,680 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 131 selfloop transitions, 26 changer transitions 4/162 dead transitions. [2025-03-08 17:29:58,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 162 transitions, 2292 flow [2025-03-08 17:29:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 67 transitions. [2025-03-08 17:29:58,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30454545454545456 [2025-03-08 17:29:58,681 INFO L175 Difference]: Start difference. First operand has 192 places, 155 transitions, 1933 flow. Second operand 10 states and 67 transitions. [2025-03-08 17:29:58,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 162 transitions, 2292 flow [2025-03-08 17:29:58,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 162 transitions, 2222 flow, removed 13 selfloop flow, removed 7 redundant places. [2025-03-08 17:29:58,719 INFO L231 Difference]: Finished difference. Result has 194 places, 152 transitions, 1874 flow [2025-03-08 17:29:58,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1874, PETRI_PLACES=194, PETRI_TRANSITIONS=152} [2025-03-08 17:29:58,720 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2025-03-08 17:29:58,720 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 152 transitions, 1874 flow [2025-03-08 17:29:58,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:58,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:58,720 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:58,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-03-08 17:29:58,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:58,920 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:58,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash -439751896, now seen corresponding path program 36 times [2025-03-08 17:29:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:58,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580256577] [2025-03-08 17:29:58,921 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:58,928 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:58,935 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:58,935 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:58,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:59,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580256577] [2025-03-08 17:29:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580256577] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118925145] [2025-03-08 17:29:59,214 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:29:59,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:59,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:59,216 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:29:59,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-08 17:29:59,337 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:29:59,359 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:29:59,359 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:29:59,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:59,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:29:59,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:59,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:59,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:29:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:59,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:59,644 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:29:59,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:29:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:29:59,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118925145] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:59,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:59,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-08 17:29:59,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637253282] [2025-03-08 17:29:59,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:59,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:29:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:59,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:29:59,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:29:59,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:29:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 152 transitions, 1874 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:29:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:00,244 INFO L124 PetriNetUnfolderBase]: 436/845 cut-off events. [2025-03-08 17:30:00,244 INFO L125 PetriNetUnfolderBase]: For 19067/19067 co-relation queries the response was YES. [2025-03-08 17:30:00,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6802 conditions, 845 events. 436/845 cut-off events. For 19067/19067 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4269 event pairs, 94 based on Foata normal form. 4/849 useless extension candidates. Maximal degree in co-relation 6692. Up to 475 conditions per place. [2025-03-08 17:30:00,250 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 126 selfloop transitions, 56 changer transitions 6/189 dead transitions. [2025-03-08 17:30:00,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 189 transitions, 2651 flow [2025-03-08 17:30:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:30:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:30:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 107 transitions. [2025-03-08 17:30:00,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2025-03-08 17:30:00,251 INFO L175 Difference]: Start difference. First operand has 194 places, 152 transitions, 1874 flow. Second operand 13 states and 107 transitions. [2025-03-08 17:30:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 189 transitions, 2651 flow [2025-03-08 17:30:00,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 2597 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-08 17:30:00,287 INFO L231 Difference]: Finished difference. Result has 196 places, 153 transitions, 1972 flow [2025-03-08 17:30:00,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1972, PETRI_PLACES=196, PETRI_TRANSITIONS=153} [2025-03-08 17:30:00,288 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 174 predicate places. [2025-03-08 17:30:00,288 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 153 transitions, 1972 flow [2025-03-08 17:30:00,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:00,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:00,288 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:00,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-03-08 17:30:00,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2025-03-08 17:30:00,488 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:00,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1450058728, now seen corresponding path program 37 times [2025-03-08 17:30:00,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:00,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505941037] [2025-03-08 17:30:00,489 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:00,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:30:00,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:00,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:00,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 17:30:01,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505941037] [2025-03-08 17:30:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505941037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324895139] [2025-03-08 17:30:01,043 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:01,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:01,045 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:01,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-08 17:30:01,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:30:01,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:01,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:01,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:01,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:30:01,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:01,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:01,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:30:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:01,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:01,372 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:30:01,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-08 17:30:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324895139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:01,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:01,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2025-03-08 17:30:01,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429739463] [2025-03-08 17:30:01,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:01,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 17:30:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:01,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 17:30:01,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-03-08 17:30:01,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:01,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 153 transitions, 1972 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:01,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:01,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:01,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:01,783 INFO L124 PetriNetUnfolderBase]: 424/809 cut-off events. [2025-03-08 17:30:01,783 INFO L125 PetriNetUnfolderBase]: For 17720/17720 co-relation queries the response was YES. [2025-03-08 17:30:01,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6672 conditions, 809 events. 424/809 cut-off events. For 17720/17720 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3925 event pairs, 148 based on Foata normal form. 2/811 useless extension candidates. Maximal degree in co-relation 6564. Up to 681 conditions per place. [2025-03-08 17:30:01,789 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 127 selfloop transitions, 38 changer transitions 2/168 dead transitions. [2025-03-08 17:30:01,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 168 transitions, 2432 flow [2025-03-08 17:30:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:30:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:30:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 106 transitions. [2025-03-08 17:30:01,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30113636363636365 [2025-03-08 17:30:01,790 INFO L175 Difference]: Start difference. First operand has 196 places, 153 transitions, 1972 flow. Second operand 16 states and 106 transitions. [2025-03-08 17:30:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 168 transitions, 2432 flow [2025-03-08 17:30:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 168 transitions, 2161 flow, removed 48 selfloop flow, removed 18 redundant places. [2025-03-08 17:30:01,819 INFO L231 Difference]: Finished difference. Result has 190 places, 150 transitions, 1756 flow [2025-03-08 17:30:01,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1756, PETRI_PLACES=190, PETRI_TRANSITIONS=150} [2025-03-08 17:30:01,820 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2025-03-08 17:30:01,820 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 150 transitions, 1756 flow [2025-03-08 17:30:01,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:01,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:01,820 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:01,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-03-08 17:30:02,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-03-08 17:30:02,020 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:02,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1354326580, now seen corresponding path program 38 times [2025-03-08 17:30:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982288972] [2025-03-08 17:30:02,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:02,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:02,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:30:02,037 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:02,038 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:02,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982288972] [2025-03-08 17:30:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982288972] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141861652] [2025-03-08 17:30:02,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:02,456 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:02,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-08 17:30:02,579 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:30:02,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:02,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:02,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:02,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:30:02,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:02,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:02,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-08 17:30:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:02,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:02,821 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-08 17:30:02,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-08 17:30:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141861652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:02,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:02,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:30:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185496162] [2025-03-08 17:30:02,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:02,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:02,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:02,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:02,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:02,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:02,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 150 transitions, 1756 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:02,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:02,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:02,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:03,201 INFO L124 PetriNetUnfolderBase]: 418/793 cut-off events. [2025-03-08 17:30:03,201 INFO L125 PetriNetUnfolderBase]: For 15855/15855 co-relation queries the response was YES. [2025-03-08 17:30:03,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 793 events. 418/793 cut-off events. For 15855/15855 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3810 event pairs, 96 based on Foata normal form. 5/798 useless extension candidates. Maximal degree in co-relation 6084. Up to 475 conditions per place. [2025-03-08 17:30:03,207 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 113 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2025-03-08 17:30:03,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 166 transitions, 2216 flow [2025-03-08 17:30:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:30:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:30:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2025-03-08 17:30:03,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2025-03-08 17:30:03,208 INFO L175 Difference]: Start difference. First operand has 190 places, 150 transitions, 1756 flow. Second operand 9 states and 74 transitions. [2025-03-08 17:30:03,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 166 transitions, 2216 flow [2025-03-08 17:30:03,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 166 transitions, 2132 flow, removed 4 selfloop flow, removed 15 redundant places. [2025-03-08 17:30:03,234 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1769 flow [2025-03-08 17:30:03,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1769, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2025-03-08 17:30:03,234 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 159 predicate places. [2025-03-08 17:30:03,234 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1769 flow [2025-03-08 17:30:03,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:03,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:03,235 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:03,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:03,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-03-08 17:30:03,435 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:03,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash -610801074, now seen corresponding path program 39 times [2025-03-08 17:30:03,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:03,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156956155] [2025-03-08 17:30:03,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:03,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:03,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:03,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:30:03,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:03,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:03,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156956155] [2025-03-08 17:30:03,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156956155] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:03,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264849109] [2025-03-08 17:30:03,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:03,730 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:03,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-08 17:30:03,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:03,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-08 17:30:03,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:03,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:03,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:30:03,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:03,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:03,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:30:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:03,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:04,021 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:30:04,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:30:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264849109] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:04,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:30:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611543553] [2025-03-08 17:30:04,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:04,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:04,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:04,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:04,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:04,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1769 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:04,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:04,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:04,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:04,389 INFO L124 PetriNetUnfolderBase]: 412/771 cut-off events. [2025-03-08 17:30:04,389 INFO L125 PetriNetUnfolderBase]: For 15122/15122 co-relation queries the response was YES. [2025-03-08 17:30:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6129 conditions, 771 events. 412/771 cut-off events. For 15122/15122 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3622 event pairs, 139 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 6029. Up to 652 conditions per place. [2025-03-08 17:30:04,394 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 129 selfloop transitions, 27 changer transitions 2/159 dead transitions. [2025-03-08 17:30:04,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 159 transitions, 2155 flow [2025-03-08 17:30:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:30:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:30:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 71 transitions. [2025-03-08 17:30:04,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32272727272727275 [2025-03-08 17:30:04,395 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1769 flow. Second operand 10 states and 71 transitions. [2025-03-08 17:30:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 159 transitions, 2155 flow [2025-03-08 17:30:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 159 transitions, 2045 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-03-08 17:30:04,424 INFO L231 Difference]: Finished difference. Result has 179 places, 146 transitions, 1687 flow [2025-03-08 17:30:04,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1687, PETRI_PLACES=179, PETRI_TRANSITIONS=146} [2025-03-08 17:30:04,424 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2025-03-08 17:30:04,424 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 146 transitions, 1687 flow [2025-03-08 17:30:04,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:04,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:04,425 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:04,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-03-08 17:30:04,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-03-08 17:30:04,625 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:04,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash -951304409, now seen corresponding path program 40 times [2025-03-08 17:30:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:04,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083326744] [2025-03-08 17:30:04,626 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:04,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:04,633 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:30:04,643 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:04,643 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:04,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:04,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083326744] [2025-03-08 17:30:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083326744] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054064678] [2025-03-08 17:30:04,931 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:04,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:04,933 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:04,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-08 17:30:05,060 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:30:05,081 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:05,082 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:05,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:05,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:30:05,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:05,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:05,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:30:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:05,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:05,272 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-08 17:30:05,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-08 17:30:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054064678] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:05,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-08 17:30:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032536315] [2025-03-08 17:30:05,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:05,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:05,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:05,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:05,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:05,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 146 transitions, 1687 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:05,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:05,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:05,635 INFO L124 PetriNetUnfolderBase]: 400/739 cut-off events. [2025-03-08 17:30:05,636 INFO L125 PetriNetUnfolderBase]: For 13893/13893 co-relation queries the response was YES. [2025-03-08 17:30:05,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 739 events. 400/739 cut-off events. For 13893/13893 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3398 event pairs, 133 based on Foata normal form. 3/742 useless extension candidates. Maximal degree in co-relation 5700. Up to 626 conditions per place. [2025-03-08 17:30:05,640 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 126 selfloop transitions, 27 changer transitions 3/157 dead transitions. [2025-03-08 17:30:05,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 157 transitions, 2113 flow [2025-03-08 17:30:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:30:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:30:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 71 transitions. [2025-03-08 17:30:05,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32272727272727275 [2025-03-08 17:30:05,641 INFO L175 Difference]: Start difference. First operand has 179 places, 146 transitions, 1687 flow. Second operand 10 states and 71 transitions. [2025-03-08 17:30:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 157 transitions, 2113 flow [2025-03-08 17:30:05,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 157 transitions, 2057 flow, removed 1 selfloop flow, removed 9 redundant places. [2025-03-08 17:30:05,666 INFO L231 Difference]: Finished difference. Result has 175 places, 144 transitions, 1670 flow [2025-03-08 17:30:05,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1670, PETRI_PLACES=175, PETRI_TRANSITIONS=144} [2025-03-08 17:30:05,667 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2025-03-08 17:30:05,667 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 144 transitions, 1670 flow [2025-03-08 17:30:05,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:05,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:05,667 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:05,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-03-08 17:30:05,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:05,867 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:05,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -77742993, now seen corresponding path program 41 times [2025-03-08 17:30:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345407118] [2025-03-08 17:30:05,868 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:05,877 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:05,892 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:05,893 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:30:05,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:30:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345407118] [2025-03-08 17:30:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345407118] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735385893] [2025-03-08 17:30:06,216 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:06,218 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:06,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-03-08 17:30:06,352 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:06,521 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:06,521 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:30:06,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:06,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 17:30:06,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:06,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:30:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:06,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735385893] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:06,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:06,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 25 [2025-03-08 17:30:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116436308] [2025-03-08 17:30:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:06,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:30:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:06,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:30:06,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:30:06,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 144 transitions, 1670 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:07,248 INFO L124 PetriNetUnfolderBase]: 508/934 cut-off events. [2025-03-08 17:30:07,248 INFO L125 PetriNetUnfolderBase]: For 17079/17079 co-relation queries the response was YES. [2025-03-08 17:30:07,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7780 conditions, 934 events. 508/934 cut-off events. For 17079/17079 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4592 event pairs, 25 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 7682. Up to 327 conditions per place. [2025-03-08 17:30:07,254 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 125 selfloop transitions, 69 changer transitions 0/195 dead transitions. [2025-03-08 17:30:07,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 195 transitions, 2849 flow [2025-03-08 17:30:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:30:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:30:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 106 transitions. [2025-03-08 17:30:07,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2025-03-08 17:30:07,255 INFO L175 Difference]: Start difference. First operand has 175 places, 144 transitions, 1670 flow. Second operand 14 states and 106 transitions. [2025-03-08 17:30:07,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 195 transitions, 2849 flow [2025-03-08 17:30:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 195 transitions, 2795 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:30:07,284 INFO L231 Difference]: Finished difference. Result has 183 places, 156 transitions, 2087 flow [2025-03-08 17:30:07,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2087, PETRI_PLACES=183, PETRI_TRANSITIONS=156} [2025-03-08 17:30:07,284 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2025-03-08 17:30:07,284 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 156 transitions, 2087 flow [2025-03-08 17:30:07,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:07,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:07,285 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:07,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-03-08 17:30:07,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-03-08 17:30:07,485 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:07,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash 747573283, now seen corresponding path program 42 times [2025-03-08 17:30:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:07,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223694568] [2025-03-08 17:30:07,486 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:07,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:07,495 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:07,503 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:30:07,503 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:07,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:07,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223694568] [2025-03-08 17:30:07,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223694568] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334769178] [2025-03-08 17:30:07,769 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:07,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:07,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:07,771 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:07,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-08 17:30:07,904 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-08 17:30:07,921 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 17:30:07,922 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:07,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:07,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:30:07,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:08,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:08,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-08 17:30:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:08,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:08,203 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:30:08,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:30:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334769178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:08,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:08,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-08 17:30:08,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721105458] [2025-03-08 17:30:08,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:08,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:30:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:08,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:30:08,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:30:08,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 156 transitions, 2087 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:08,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:08,804 INFO L124 PetriNetUnfolderBase]: 491/899 cut-off events. [2025-03-08 17:30:08,805 INFO L125 PetriNetUnfolderBase]: For 17146/17146 co-relation queries the response was YES. [2025-03-08 17:30:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7790 conditions, 899 events. 491/899 cut-off events. For 17146/17146 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4352 event pairs, 17 based on Foata normal form. 9/908 useless extension candidates. Maximal degree in co-relation 7684. Up to 453 conditions per place. [2025-03-08 17:30:08,811 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 123 selfloop transitions, 63 changer transitions 3/190 dead transitions. [2025-03-08 17:30:08,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 190 transitions, 2889 flow [2025-03-08 17:30:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:30:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:30:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2025-03-08 17:30:08,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2025-03-08 17:30:08,812 INFO L175 Difference]: Start difference. First operand has 183 places, 156 transitions, 2087 flow. Second operand 16 states and 119 transitions. [2025-03-08 17:30:08,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 190 transitions, 2889 flow [2025-03-08 17:30:08,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 190 transitions, 2779 flow, removed 19 selfloop flow, removed 7 redundant places. [2025-03-08 17:30:08,844 INFO L231 Difference]: Finished difference. Result has 190 places, 152 transitions, 2045 flow [2025-03-08 17:30:08,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2045, PETRI_PLACES=190, PETRI_TRANSITIONS=152} [2025-03-08 17:30:08,845 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2025-03-08 17:30:08,845 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 152 transitions, 2045 flow [2025-03-08 17:30:08,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:08,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:08,845 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:08,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-03-08 17:30:09,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:09,046 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:09,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash -212567167, now seen corresponding path program 43 times [2025-03-08 17:30:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651552854] [2025-03-08 17:30:09,046 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:09,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:30:09,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:09,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:09,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:09,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651552854] [2025-03-08 17:30:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651552854] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:09,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221791037] [2025-03-08 17:30:09,328 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:09,330 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:09,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-03-08 17:30:09,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:30:09,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:30:09,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:09,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:09,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:30:09,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:09,543 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 17:30:09,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-08 17:30:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:09,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:09,639 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-08 17:30:09,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-08 17:30:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:09,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221791037] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:09,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:09,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-08 17:30:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229121513] [2025-03-08 17:30:09,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:09,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:30:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:09,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:30:09,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:30:09,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:09,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 152 transitions, 2045 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:09,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:09,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:09,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:09,968 INFO L124 PetriNetUnfolderBase]: 504/907 cut-off events. [2025-03-08 17:30:09,968 INFO L125 PetriNetUnfolderBase]: For 17238/17238 co-relation queries the response was YES. [2025-03-08 17:30:09,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8164 conditions, 907 events. 504/907 cut-off events. For 17238/17238 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4368 event pairs, 21 based on Foata normal form. 8/915 useless extension candidates. Maximal degree in co-relation 8060. Up to 505 conditions per place. [2025-03-08 17:30:09,974 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 116 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2025-03-08 17:30:09,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 179 transitions, 2873 flow [2025-03-08 17:30:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:30:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:30:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-03-08 17:30:09,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-08 17:30:09,974 INFO L175 Difference]: Start difference. First operand has 190 places, 152 transitions, 2045 flow. Second operand 12 states and 88 transitions. [2025-03-08 17:30:09,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 179 transitions, 2873 flow [2025-03-08 17:30:10,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 179 transitions, 2768 flow, removed 6 selfloop flow, removed 13 redundant places. [2025-03-08 17:30:10,007 INFO L231 Difference]: Finished difference. Result has 186 places, 156 transitions, 2192 flow [2025-03-08 17:30:10,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2192, PETRI_PLACES=186, PETRI_TRANSITIONS=156} [2025-03-08 17:30:10,007 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2025-03-08 17:30:10,008 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 156 transitions, 2192 flow [2025-03-08 17:30:10,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:10,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:10,008 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:10,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-03-08 17:30:10,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2025-03-08 17:30:10,208 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:10,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1749835468, now seen corresponding path program 44 times [2025-03-08 17:30:10,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365586803] [2025-03-08 17:30:10,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:10,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:10,226 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:10,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:10,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 17:30:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365586803] [2025-03-08 17:30:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365586803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894828671] [2025-03-08 17:30:10,647 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:10,649 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:10,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-08 17:30:10,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:10,809 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:10,809 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:10,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:10,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:10,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:10,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:10,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:10,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:11,192 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-03-08 17:30:11,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2025-03-08 17:30:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:11,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894828671] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:11,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:11,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2025-03-08 17:30:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397303951] [2025-03-08 17:30:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:11,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:30:11,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:11,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:30:11,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:30:11,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 156 transitions, 2192 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:11,872 INFO L124 PetriNetUnfolderBase]: 636/1143 cut-off events. [2025-03-08 17:30:11,872 INFO L125 PetriNetUnfolderBase]: For 23120/23120 co-relation queries the response was YES. [2025-03-08 17:30:11,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10223 conditions, 1143 events. 636/1143 cut-off events. For 23120/23120 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5821 event pairs, 54 based on Foata normal form. 1/1144 useless extension candidates. Maximal degree in co-relation 10118. Up to 422 conditions per place. [2025-03-08 17:30:11,882 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 135 selfloop transitions, 79 changer transitions 3/218 dead transitions. [2025-03-08 17:30:11,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 218 transitions, 3475 flow [2025-03-08 17:30:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:30:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:30:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2025-03-08 17:30:11,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34759358288770054 [2025-03-08 17:30:11,883 INFO L175 Difference]: Start difference. First operand has 186 places, 156 transitions, 2192 flow. Second operand 17 states and 130 transitions. [2025-03-08 17:30:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 218 transitions, 3475 flow [2025-03-08 17:30:11,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 218 transitions, 3265 flow, removed 10 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:11,933 INFO L231 Difference]: Finished difference. Result has 197 places, 168 transitions, 2454 flow [2025-03-08 17:30:11,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2454, PETRI_PLACES=197, PETRI_TRANSITIONS=168} [2025-03-08 17:30:11,933 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2025-03-08 17:30:11,933 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 168 transitions, 2454 flow [2025-03-08 17:30:11,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:11,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:11,934 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:11,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:12,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:12,134 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:12,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -931461086, now seen corresponding path program 45 times [2025-03-08 17:30:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:12,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945186611] [2025-03-08 17:30:12,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:12,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:12,149 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-03-08 17:30:12,149 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:12,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945186611] [2025-03-08 17:30:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945186611] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039087747] [2025-03-08 17:30:12,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:12,417 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-08 17:30:12,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:12,575 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-03-08 17:30:12,575 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:12,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:12,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:12,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:12,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:12,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:12,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:12,948 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-08 17:30:12,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-03-08 17:30:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039087747] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:13,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2025-03-08 17:30:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456109604] [2025-03-08 17:30:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:13,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:30:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:13,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:30:13,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:30:13,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:13,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 168 transitions, 2454 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:13,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:13,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:13,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:13,718 INFO L124 PetriNetUnfolderBase]: 652/1173 cut-off events. [2025-03-08 17:30:13,718 INFO L125 PetriNetUnfolderBase]: For 25425/25425 co-relation queries the response was YES. [2025-03-08 17:30:13,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10740 conditions, 1173 events. 652/1173 cut-off events. For 25425/25425 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6058 event pairs, 70 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 10626. Up to 744 conditions per place. [2025-03-08 17:30:13,727 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 131 selfloop transitions, 72 changer transitions 2/206 dead transitions. [2025-03-08 17:30:13,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 206 transitions, 3379 flow [2025-03-08 17:30:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:30:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:30:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-08 17:30:13,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-08 17:30:13,728 INFO L175 Difference]: Start difference. First operand has 197 places, 168 transitions, 2454 flow. Second operand 14 states and 110 transitions. [2025-03-08 17:30:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 206 transitions, 3379 flow [2025-03-08 17:30:13,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 206 transitions, 3143 flow, removed 55 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:13,780 INFO L231 Difference]: Finished difference. Result has 204 places, 179 transitions, 2619 flow [2025-03-08 17:30:13,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2619, PETRI_PLACES=204, PETRI_TRANSITIONS=179} [2025-03-08 17:30:13,780 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 182 predicate places. [2025-03-08 17:30:13,780 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 179 transitions, 2619 flow [2025-03-08 17:30:13,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:13,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:13,781 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:13,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-03-08 17:30:13,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:13,981 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:13,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 428905728, now seen corresponding path program 46 times [2025-03-08 17:30:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882553397] [2025-03-08 17:30:13,982 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:13,989 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:14,000 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:14,000 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:14,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 17:30:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882553397] [2025-03-08 17:30:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882553397] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437104285] [2025-03-08 17:30:14,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:14,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:14,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:14,428 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:14,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-08 17:30:14,615 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:14,641 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:14,641 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:14,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:14,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:14,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:14,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:14,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:14,983 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:30:14,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:30:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437104285] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:15,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:15,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2025-03-08 17:30:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690055946] [2025-03-08 17:30:15,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:15,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:30:15,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:15,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:30:15,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:30:15,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:15,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 179 transitions, 2619 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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) [2025-03-08 17:30:15,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:15,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:15,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:15,990 INFO L124 PetriNetUnfolderBase]: 726/1313 cut-off events. [2025-03-08 17:30:15,990 INFO L125 PetriNetUnfolderBase]: For 32485/32485 co-relation queries the response was YES. [2025-03-08 17:30:15,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12234 conditions, 1313 events. 726/1313 cut-off events. For 32485/32485 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6859 event pairs, 72 based on Foata normal form. 4/1317 useless extension candidates. Maximal degree in co-relation 12122. Up to 786 conditions per place. [2025-03-08 17:30:16,001 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 155 selfloop transitions, 90 changer transitions 5/251 dead transitions. [2025-03-08 17:30:16,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 251 transitions, 4161 flow [2025-03-08 17:30:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:30:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:30:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 186 transitions. [2025-03-08 17:30:16,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2025-03-08 17:30:16,002 INFO L175 Difference]: Start difference. First operand has 204 places, 179 transitions, 2619 flow. Second operand 24 states and 186 transitions. [2025-03-08 17:30:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 251 transitions, 4161 flow [2025-03-08 17:30:16,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 251 transitions, 3836 flow, removed 95 selfloop flow, removed 9 redundant places. [2025-03-08 17:30:16,076 INFO L231 Difference]: Finished difference. Result has 226 places, 196 transitions, 2985 flow [2025-03-08 17:30:16,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2985, PETRI_PLACES=226, PETRI_TRANSITIONS=196} [2025-03-08 17:30:16,077 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 204 predicate places. [2025-03-08 17:30:16,077 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 196 transitions, 2985 flow [2025-03-08 17:30:16,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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) [2025-03-08 17:30:16,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:16,077 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:16,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:16,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2025-03-08 17:30:16,277 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:16,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1962866624, now seen corresponding path program 47 times [2025-03-08 17:30:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:16,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254428734] [2025-03-08 17:30:16,278 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:16,286 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:16,317 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:16,317 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:30:16,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:17,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254428734] [2025-03-08 17:30:17,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254428734] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201871759] [2025-03-08 17:30:17,076 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:17,078 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-08 17:30:17,221 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:17,297 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:17,297 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 17:30:17,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:17,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 17:30:17,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:17,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:30:17,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:17,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-08 17:30:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 17:30:17,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201871759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:18,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 43 [2025-03-08 17:30:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330246768] [2025-03-08 17:30:18,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:18,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 17:30:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:18,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 17:30:18,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 17:30:18,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:18,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 196 transitions, 2985 flow. Second operand has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:18,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:18,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:18,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:19,745 INFO L124 PetriNetUnfolderBase]: 768/1390 cut-off events. [2025-03-08 17:30:19,745 INFO L125 PetriNetUnfolderBase]: For 39513/39513 co-relation queries the response was YES. [2025-03-08 17:30:19,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13370 conditions, 1390 events. 768/1390 cut-off events. For 39513/39513 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7395 event pairs, 84 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 13247. Up to 873 conditions per place. [2025-03-08 17:30:19,758 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 156 selfloop transitions, 96 changer transitions 5/258 dead transitions. [2025-03-08 17:30:19,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 258 transitions, 4478 flow [2025-03-08 17:30:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:30:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:30:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 184 transitions. [2025-03-08 17:30:19,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33454545454545453 [2025-03-08 17:30:19,759 INFO L175 Difference]: Start difference. First operand has 226 places, 196 transitions, 2985 flow. Second operand 25 states and 184 transitions. [2025-03-08 17:30:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 258 transitions, 4478 flow [2025-03-08 17:30:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 258 transitions, 4157 flow, removed 96 selfloop flow, removed 15 redundant places. [2025-03-08 17:30:19,872 INFO L231 Difference]: Finished difference. Result has 240 places, 207 transitions, 3245 flow [2025-03-08 17:30:19,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3245, PETRI_PLACES=240, PETRI_TRANSITIONS=207} [2025-03-08 17:30:19,872 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 218 predicate places. [2025-03-08 17:30:19,873 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 207 transitions, 3245 flow [2025-03-08 17:30:19,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:19,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:19,873 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:19,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:20,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-03-08 17:30:20,073 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:20,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1805201766, now seen corresponding path program 48 times [2025-03-08 17:30:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049137901] [2025-03-08 17:30:20,074 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:20,083 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:20,093 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-03-08 17:30:20,093 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:20,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:20,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049137901] [2025-03-08 17:30:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049137901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:20,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5074536] [2025-03-08 17:30:20,426 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:20,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:20,429 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:20,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-08 17:30:20,592 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:20,613 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-03-08 17:30:20,613 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:20,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:20,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:20,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:20,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:20,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:20,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:21,075 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-08 17:30:21,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2025-03-08 17:30:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5074536] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:21,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:21,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2025-03-08 17:30:21,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739663901] [2025-03-08 17:30:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:21,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:30:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:21,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:30:21,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:30:21,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:21,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 207 transitions, 3245 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:21,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:21,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:21,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:21,753 INFO L124 PetriNetUnfolderBase]: 772/1401 cut-off events. [2025-03-08 17:30:21,753 INFO L125 PetriNetUnfolderBase]: For 42639/42639 co-relation queries the response was YES. [2025-03-08 17:30:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13646 conditions, 1401 events. 772/1401 cut-off events. For 42639/42639 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7486 event pairs, 102 based on Foata normal form. 1/1402 useless extension candidates. Maximal degree in co-relation 13516. Up to 954 conditions per place. [2025-03-08 17:30:21,763 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 158 selfloop transitions, 75 changer transitions 3/237 dead transitions. [2025-03-08 17:30:21,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 237 transitions, 4176 flow [2025-03-08 17:30:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:30:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:30:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-08 17:30:21,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-08 17:30:21,764 INFO L175 Difference]: Start difference. First operand has 240 places, 207 transitions, 3245 flow. Second operand 14 states and 110 transitions. [2025-03-08 17:30:21,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 237 transitions, 4176 flow [2025-03-08 17:30:21,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 237 transitions, 3873 flow, removed 75 selfloop flow, removed 19 redundant places. [2025-03-08 17:30:21,860 INFO L231 Difference]: Finished difference. Result has 237 places, 209 transitions, 3186 flow [2025-03-08 17:30:21,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3186, PETRI_PLACES=237, PETRI_TRANSITIONS=209} [2025-03-08 17:30:21,861 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2025-03-08 17:30:21,861 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 209 transitions, 3186 flow [2025-03-08 17:30:21,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:21,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:21,861 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:21,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:22,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-03-08 17:30:22,062 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:22,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1457806464, now seen corresponding path program 49 times [2025-03-08 17:30:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:22,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775165138] [2025-03-08 17:30:22,062 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:22,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:30:22,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:22,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:22,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 17:30:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775165138] [2025-03-08 17:30:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775165138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625914381] [2025-03-08 17:30:22,581 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:22,584 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:22,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-03-08 17:30:22,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:30:22,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:22,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:22,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:22,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:22,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:22,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:22,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:22,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:23,154 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-08 17:30:23,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-03-08 17:30:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:23,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625914381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:23,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:23,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2025-03-08 17:30:23,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106664578] [2025-03-08 17:30:23,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:23,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:30:23,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:23,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:30:23,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:30:23,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:23,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 209 transitions, 3186 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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) [2025-03-08 17:30:23,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:23,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:23,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:23,955 INFO L124 PetriNetUnfolderBase]: 774/1406 cut-off events. [2025-03-08 17:30:23,955 INFO L125 PetriNetUnfolderBase]: For 42916/42916 co-relation queries the response was YES. [2025-03-08 17:30:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13719 conditions, 1406 events. 774/1406 cut-off events. For 42916/42916 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7544 event pairs, 104 based on Foata normal form. 1/1407 useless extension candidates. Maximal degree in co-relation 13592. Up to 953 conditions per place. [2025-03-08 17:30:23,967 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 154 selfloop transitions, 79 changer transitions 4/238 dead transitions. [2025-03-08 17:30:23,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 238 transitions, 4114 flow [2025-03-08 17:30:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:30:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:30:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 122 transitions. [2025-03-08 17:30:23,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32620320855614976 [2025-03-08 17:30:23,968 INFO L175 Difference]: Start difference. First operand has 237 places, 209 transitions, 3186 flow. Second operand 17 states and 122 transitions. [2025-03-08 17:30:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 238 transitions, 4114 flow [2025-03-08 17:30:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 238 transitions, 3912 flow, removed 30 selfloop flow, removed 12 redundant places. [2025-03-08 17:30:24,069 INFO L231 Difference]: Finished difference. Result has 243 places, 209 transitions, 3209 flow [2025-03-08 17:30:24,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3209, PETRI_PLACES=243, PETRI_TRANSITIONS=209} [2025-03-08 17:30:24,069 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 221 predicate places. [2025-03-08 17:30:24,069 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 209 transitions, 3209 flow [2025-03-08 17:30:24,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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) [2025-03-08 17:30:24,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:24,069 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:24,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-03-08 17:30:24,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2025-03-08 17:30:24,270 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:24,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1757110492, now seen corresponding path program 50 times [2025-03-08 17:30:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096483417] [2025-03-08 17:30:24,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:24,278 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:24,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:24,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:24,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 17:30:24,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:24,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096483417] [2025-03-08 17:30:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096483417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:24,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423944417] [2025-03-08 17:30:24,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:24,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:24,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:24,731 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:24,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-03-08 17:30:24,898 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:30:24,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:30:24,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:24,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:24,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:24,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:24,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:24,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-08 17:30:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:25,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:25,248 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-08 17:30:25,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-08 17:30:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 17:30:25,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423944417] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:25,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:25,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2025-03-08 17:30:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081269604] [2025-03-08 17:30:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:25,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 17:30:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:25,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 17:30:25,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2025-03-08 17:30:25,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-08 17:30:25,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 209 transitions, 3209 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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) [2025-03-08 17:30:25,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:25,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-08 17:30:25,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:26,175 INFO L124 PetriNetUnfolderBase]: 840/1527 cut-off events. [2025-03-08 17:30:26,176 INFO L125 PetriNetUnfolderBase]: For 52838/52838 co-relation queries the response was YES. [2025-03-08 17:30:26,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15477 conditions, 1527 events. 840/1527 cut-off events. For 52838/52838 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8300 event pairs, 118 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 15345. Up to 1292 conditions per place. [2025-03-08 17:30:26,187 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 208 selfloop transitions, 51 changer transitions 4/264 dead transitions. [2025-03-08 17:30:26,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 264 transitions, 4847 flow [2025-03-08 17:30:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:30:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:30:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 154 transitions. [2025-03-08 17:30:26,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-08 17:30:26,188 INFO L175 Difference]: Start difference. First operand has 243 places, 209 transitions, 3209 flow. Second operand 21 states and 154 transitions. [2025-03-08 17:30:26,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 264 transitions, 4847 flow [2025-03-08 17:30:26,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 264 transitions, 4610 flow, removed 41 selfloop flow, removed 16 redundant places. [2025-03-08 17:30:26,298 INFO L231 Difference]: Finished difference. Result has 252 places, 225 transitions, 3776 flow [2025-03-08 17:30:26,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3776, PETRI_PLACES=252, PETRI_TRANSITIONS=225} [2025-03-08 17:30:26,298 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 230 predicate places. [2025-03-08 17:30:26,298 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 225 transitions, 3776 flow [2025-03-08 17:30:26,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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) [2025-03-08 17:30:26,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:26,299 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:26,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-03-08 17:30:26,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-03-08 17:30:26,499 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:26,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -633676548, now seen corresponding path program 51 times [2025-03-08 17:30:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:26,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978166038] [2025-03-08 17:30:26,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:26,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:26,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-08 17:30:26,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 29 statements. [2025-03-08 17:30:26,516 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:30:26,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978166038] [2025-03-08 17:30:26,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978166038] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486353714] [2025-03-08 17:30:26,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:26,789 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:26,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process