./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:35:33,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:35:33,668 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:35:33,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:35:33,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:35:33,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:35:33,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:35:33,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:35:33,696 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:35:33,696 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:35:33,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:35:33,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:35:33,697 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:35:33,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:35:33,697 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:35:33,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:35:33,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:35:33,697 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:35:33,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:35:33,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:35:33,698 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:35:33,699 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:35:33,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:35:33,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:35:33,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:35:33,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:35:33,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:35:33,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:35:33,700 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 -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2025-03-17 06:35:33,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:35:33,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:35:33,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:35:33,935 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:35:33,935 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:35:33,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2025-03-17 06:35:35,060 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ed08126/452ab52c121546b6a9f633b0d61e2277/FLAG95607fcb3 [2025-03-17 06:35:35,288 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:35:35,289 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2025-03-17 06:35:35,297 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ed08126/452ab52c121546b6a9f633b0d61e2277/FLAG95607fcb3 [2025-03-17 06:35:35,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ed08126/452ab52c121546b6a9f633b0d61e2277 [2025-03-17 06:35:35,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:35:35,657 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:35:35,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:35:35,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:35:35,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:35:35,665 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2010d99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35, skipping insertion in model container [2025-03-17 06:35:35,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,684 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:35:35,809 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2025-03-17 06:35:35,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:35:35,829 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:35:35,844 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2025-03-17 06:35:35,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:35:35,858 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:35:35,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35 WrapperNode [2025-03-17 06:35:35,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:35:35,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:35:35,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:35:35,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:35:35,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,877 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,905 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 256 [2025-03-17 06:35:35,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:35:35,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:35:35,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:35:35,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:35:35,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,938 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 06:35:35,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,945 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:35:35,956 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:35:35,956 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:35:35,957 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:35:35,957 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (1/1) ... [2025-03-17 06:35:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:35:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:35,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:35:35,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:35:36,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:35:36,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:35:36,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:35:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:35:36,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:35:36,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:35:36,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:35:36,007 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:35:36,086 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:35:36,087 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:35:36,460 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:35:36,460 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:35:36,704 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:35:36,705 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:35:36,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:35:36 BoogieIcfgContainer [2025-03-17 06:35:36,705 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:35:36,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:35:36,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:35:36,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:35:36,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:35:35" (1/3) ... [2025-03-17 06:35:36,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2b4a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:35:36, skipping insertion in model container [2025-03-17 06:35:36,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:35" (2/3) ... [2025-03-17 06:35:36,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2b4a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:35:36, skipping insertion in model container [2025-03-17 06:35:36,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:35:36" (3/3) ... [2025-03-17 06:35:36,712 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2025-03-17 06:35:36,726 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:35:36,727 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-subst.wvr.c that has 4 procedures, 32 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-17 06:35:36,727 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:35:36,776 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:35:36,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:35:36,827 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2025-03-17 06:35:36,832 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:35:36,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-03-17 06:35:36,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:35:36,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2025-03-17 06:35:36,846 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:35:36,853 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;@4d37160f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:35:36,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:35:36,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:35:36,862 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2025-03-17 06:35:36,862 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:35:36,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:36,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:36,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:36,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash -69164210, now seen corresponding path program 1 times [2025-03-17 06:35:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551638152] [2025-03-17 06:35:36,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:36,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:35:37,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:35:37,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:37,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551638152] [2025-03-17 06:35:37,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551638152] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:37,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:37,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:35:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020077989] [2025-03-17 06:35:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:37,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:35:37,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:37,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:35:37,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:35:37,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:37,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:37,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:37,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:37,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:38,546 INFO L124 PetriNetUnfolderBase]: 2153/3087 cut-off events. [2025-03-17 06:35:38,546 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2025-03-17 06:35:38,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 3087 events. 2153/3087 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14352 event pairs, 208 based on Foata normal form. 1/2624 useless extension candidates. Maximal degree in co-relation 3509. Up to 1010 conditions per place. [2025-03-17 06:35:38,564 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 101 selfloop transitions, 16 changer transitions 1/122 dead transitions. [2025-03-17 06:35:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 122 transitions, 546 flow [2025-03-17 06:35:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:35:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:35:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2025-03-17 06:35:38,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4725 [2025-03-17 06:35:38,575 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 10 states and 189 transitions. [2025-03-17 06:35:38,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 122 transitions, 546 flow [2025-03-17 06:35:38,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 122 transitions, 502 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:35:38,584 INFO L231 Difference]: Finished difference. Result has 44 places, 52 transitions, 178 flow [2025-03-17 06:35:38,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=44, PETRI_TRANSITIONS=52} [2025-03-17 06:35:38,588 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2025-03-17 06:35:38,588 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 52 transitions, 178 flow [2025-03-17 06:35:38,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:38,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:38,588 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:38,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:35:38,589 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:38,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 682749508, now seen corresponding path program 2 times [2025-03-17 06:35:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123929290] [2025-03-17 06:35:38,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:38,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:35:38,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:35:38,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:35:38,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:39,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123929290] [2025-03-17 06:35:39,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123929290] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:39,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:39,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:35:39,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884871091] [2025-03-17 06:35:39,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:39,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:35:39,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:39,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:35:39,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:35:39,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:39,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 52 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:39,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:39,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:39,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:39,556 INFO L124 PetriNetUnfolderBase]: 2330/3393 cut-off events. [2025-03-17 06:35:39,556 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2025-03-17 06:35:39,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7317 conditions, 3393 events. 2330/3393 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 16507 event pairs, 223 based on Foata normal form. 1/3223 useless extension candidates. Maximal degree in co-relation 4838. Up to 1010 conditions per place. [2025-03-17 06:35:39,572 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 103 selfloop transitions, 18 changer transitions 1/126 dead transitions. [2025-03-17 06:35:39,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 126 transitions, 599 flow [2025-03-17 06:35:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:35:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:35:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2025-03-17 06:35:39,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4775 [2025-03-17 06:35:39,574 INFO L175 Difference]: Start difference. First operand has 44 places, 52 transitions, 178 flow. Second operand 10 states and 191 transitions. [2025-03-17 06:35:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 126 transitions, 599 flow [2025-03-17 06:35:39,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 126 transitions, 593 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-03-17 06:35:39,578 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 242 flow [2025-03-17 06:35:39,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=242, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2025-03-17 06:35:39,579 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2025-03-17 06:35:39,579 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 242 flow [2025-03-17 06:35:39,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:39,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:39,579 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:39,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:35:39,579 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:39,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash -736158365, now seen corresponding path program 1 times [2025-03-17 06:35:39,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:39,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611520997] [2025-03-17 06:35:39,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:39,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:39,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:39,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:39,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:39,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:39,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611520997] [2025-03-17 06:35:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611520997] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341782527] [2025-03-17 06:35:39,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:39,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:39,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:35:39,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:39,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:39,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:39,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:39,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:35:39,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:39,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341782527] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:39,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:39,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-17 06:35:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673234502] [2025-03-17 06:35:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:39,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:39,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:39,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:35:40,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:40,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:40,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:40,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:40,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:40,607 INFO L124 PetriNetUnfolderBase]: 4218/6091 cut-off events. [2025-03-17 06:35:40,607 INFO L125 PetriNetUnfolderBase]: For 2247/2247 co-relation queries the response was YES. [2025-03-17 06:35:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14013 conditions, 6091 events. 4218/6091 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32122 event pairs, 2162 based on Foata normal form. 1/5801 useless extension candidates. Maximal degree in co-relation 11614. Up to 3210 conditions per place. [2025-03-17 06:35:40,637 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 123 selfloop transitions, 8 changer transitions 4/139 dead transitions. [2025-03-17 06:35:40,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 139 transitions, 773 flow [2025-03-17 06:35:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:35:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:35:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2025-03-17 06:35:40,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2025-03-17 06:35:40,641 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 242 flow. Second operand 7 states and 161 transitions. [2025-03-17 06:35:40,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 139 transitions, 773 flow [2025-03-17 06:35:40,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 139 transitions, 748 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 06:35:40,657 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 269 flow [2025-03-17 06:35:40,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2025-03-17 06:35:40,658 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2025-03-17 06:35:40,658 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 269 flow [2025-03-17 06:35:40,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:40,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:40,658 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:40,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:40,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:40,860 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:40,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -117383589, now seen corresponding path program 1 times [2025-03-17 06:35:40,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119758381] [2025-03-17 06:35:40,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:40,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:40,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:40,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:40,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119758381] [2025-03-17 06:35:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119758381] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506123890] [2025-03-17 06:35:40,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:41,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:41,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:35:41,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:41,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:41,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:41,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:41,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:35:41,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:41,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506123890] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:41,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:41,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-03-17 06:35:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062727266] [2025-03-17 06:35:41,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:41,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:35:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:41,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:35:41,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:35:41,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:41,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:41,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:41,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:41,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:42,000 INFO L124 PetriNetUnfolderBase]: 5196/7503 cut-off events. [2025-03-17 06:35:42,000 INFO L125 PetriNetUnfolderBase]: For 3059/3059 co-relation queries the response was YES. [2025-03-17 06:35:42,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 7503 events. 5196/7503 cut-off events. For 3059/3059 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40946 event pairs, 2757 based on Foata normal form. 1/7487 useless extension candidates. Maximal degree in co-relation 15463. Up to 3550 conditions per place. [2025-03-17 06:35:42,056 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 8 changer transitions 4/133 dead transitions. [2025-03-17 06:35:42,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 133 transitions, 754 flow [2025-03-17 06:35:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2025-03-17 06:35:42,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2025-03-17 06:35:42,057 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 269 flow. Second operand 6 states and 154 transitions. [2025-03-17 06:35:42,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 133 transitions, 754 flow [2025-03-17 06:35:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 133 transitions, 743 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:42,069 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 293 flow [2025-03-17 06:35:42,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2025-03-17 06:35:42,069 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2025-03-17 06:35:42,070 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 293 flow [2025-03-17 06:35:42,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:42,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:42,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:42,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:42,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 06:35:42,271 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:42,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2004401944, now seen corresponding path program 1 times [2025-03-17 06:35:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:42,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998534791] [2025-03-17 06:35:42,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:42,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:42,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:42,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:42,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:42,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:42,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998534791] [2025-03-17 06:35:42,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998534791] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:42,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:42,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:35:42,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299653925] [2025-03-17 06:35:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:42,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:42,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:42,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:42,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:42,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:42,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:42,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:42,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:42,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:42,949 INFO L124 PetriNetUnfolderBase]: 3691/5583 cut-off events. [2025-03-17 06:35:42,950 INFO L125 PetriNetUnfolderBase]: For 3292/3292 co-relation queries the response was YES. [2025-03-17 06:35:42,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13753 conditions, 5583 events. 3691/5583 cut-off events. For 3292/3292 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31393 event pairs, 1550 based on Foata normal form. 230/5796 useless extension candidates. Maximal degree in co-relation 12940. Up to 2450 conditions per place. [2025-03-17 06:35:42,979 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 81 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2025-03-17 06:35:42,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 609 flow [2025-03-17 06:35:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2025-03-17 06:35:42,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-17 06:35:42,981 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 293 flow. Second operand 6 states and 116 transitions. [2025-03-17 06:35:42,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 609 flow [2025-03-17 06:35:42,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 594 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 06:35:42,991 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 329 flow [2025-03-17 06:35:42,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-17 06:35:42,992 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2025-03-17 06:35:42,992 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 329 flow [2025-03-17 06:35:42,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:42,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:42,992 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:42,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:35:42,992 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:42,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1093721254, now seen corresponding path program 1 times [2025-03-17 06:35:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:42,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666773042] [2025-03-17 06:35:42,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:42,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:43,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:43,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:43,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666773042] [2025-03-17 06:35:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666773042] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:43,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:43,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:35:43,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295380026] [2025-03-17 06:35:43,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:43,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:43,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:43,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:43,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:43,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:43,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:43,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:43,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:43,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:43,396 INFO L124 PetriNetUnfolderBase]: 2524/3996 cut-off events. [2025-03-17 06:35:43,396 INFO L125 PetriNetUnfolderBase]: For 2895/2895 co-relation queries the response was YES. [2025-03-17 06:35:43,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10184 conditions, 3996 events. 2524/3996 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22897 event pairs, 1166 based on Foata normal form. 176/4161 useless extension candidates. Maximal degree in co-relation 9682. Up to 2022 conditions per place. [2025-03-17 06:35:43,412 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 86 selfloop transitions, 10 changer transitions 5/105 dead transitions. [2025-03-17 06:35:43,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 694 flow [2025-03-17 06:35:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2025-03-17 06:35:43,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2025-03-17 06:35:43,413 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 329 flow. Second operand 6 states and 121 transitions. [2025-03-17 06:35:43,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 694 flow [2025-03-17 06:35:43,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 650 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-03-17 06:35:43,421 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 300 flow [2025-03-17 06:35:43,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2025-03-17 06:35:43,422 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2025-03-17 06:35:43,422 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 300 flow [2025-03-17 06:35:43,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:43,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:43,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:43,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:35:43,423 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:43,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1226744886, now seen corresponding path program 1 times [2025-03-17 06:35:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099315893] [2025-03-17 06:35:43,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:43,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:43,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:43,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:43,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:43,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099315893] [2025-03-17 06:35:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099315893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578286998] [2025-03-17 06:35:43,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:43,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:43,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:35:43,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:43,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:43,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:43,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:43,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:35:43,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:43,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578286998] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:44,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:44,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 20 [2025-03-17 06:35:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111829493] [2025-03-17 06:35:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:44,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:35:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:44,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:35:44,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-03-17 06:35:44,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:44,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 300 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:44,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:44,964 INFO L124 PetriNetUnfolderBase]: 3147/5022 cut-off events. [2025-03-17 06:35:44,964 INFO L125 PetriNetUnfolderBase]: For 3839/3839 co-relation queries the response was YES. [2025-03-17 06:35:44,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12644 conditions, 5022 events. 3147/5022 cut-off events. For 3839/3839 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30826 event pairs, 797 based on Foata normal form. 1/4883 useless extension candidates. Maximal degree in co-relation 12575. Up to 1911 conditions per place. [2025-03-17 06:35:44,990 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 149 selfloop transitions, 34 changer transitions 4/191 dead transitions. [2025-03-17 06:35:44,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 191 transitions, 1208 flow [2025-03-17 06:35:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:35:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:35:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2025-03-17 06:35:44,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-17 06:35:44,992 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 300 flow. Second operand 12 states and 240 transitions. [2025-03-17 06:35:44,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 191 transitions, 1208 flow [2025-03-17 06:35:44,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 191 transitions, 1183 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-17 06:35:45,000 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 611 flow [2025-03-17 06:35:45,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=611, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2025-03-17 06:35:45,000 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2025-03-17 06:35:45,000 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 611 flow [2025-03-17 06:35:45,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:45,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:45,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:45,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:45,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:45,201 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:45,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -447640236, now seen corresponding path program 2 times [2025-03-17 06:35:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649355861] [2025-03-17 06:35:45,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:45,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:35:45,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 25 statements. [2025-03-17 06:35:45,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:35:45,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:45,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649355861] [2025-03-17 06:35:45,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649355861] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:45,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:45,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:35:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403334724] [2025-03-17 06:35:45,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:45,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:45,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:45,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:35:45,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:45,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 611 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:45,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:45,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:45,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:46,120 INFO L124 PetriNetUnfolderBase]: 3187/5159 cut-off events. [2025-03-17 06:35:46,120 INFO L125 PetriNetUnfolderBase]: For 7505/7505 co-relation queries the response was YES. [2025-03-17 06:35:46,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14303 conditions, 5159 events. 3187/5159 cut-off events. For 7505/7505 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32462 event pairs, 536 based on Foata normal form. 3/5023 useless extension candidates. Maximal degree in co-relation 12497. Up to 3527 conditions per place. [2025-03-17 06:35:46,141 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 105 selfloop transitions, 24 changer transitions 16/149 dead transitions. [2025-03-17 06:35:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 149 transitions, 1186 flow [2025-03-17 06:35:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:35:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:35:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2025-03-17 06:35:46,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4275 [2025-03-17 06:35:46,143 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 611 flow. Second operand 10 states and 171 transitions. [2025-03-17 06:35:46,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 149 transitions, 1186 flow [2025-03-17 06:35:46,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 1153 flow, removed 12 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:46,156 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 679 flow [2025-03-17 06:35:46,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=679, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2025-03-17 06:35:46,157 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2025-03-17 06:35:46,157 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 679 flow [2025-03-17 06:35:46,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:46,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:46,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:46,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:35:46,157 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:46,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1976312066, now seen corresponding path program 3 times [2025-03-17 06:35:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191846660] [2025-03-17 06:35:46,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:35:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:46,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:35:46,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 25 statements. [2025-03-17 06:35:46,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:35:46,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191846660] [2025-03-17 06:35:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191846660] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:46,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:46,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:35:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783181725] [2025-03-17 06:35:46,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:46,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:46,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:46,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:35:46,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:46,903 INFO L124 PetriNetUnfolderBase]: 2988/4779 cut-off events. [2025-03-17 06:35:46,903 INFO L125 PetriNetUnfolderBase]: For 8595/8595 co-relation queries the response was YES. [2025-03-17 06:35:46,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13583 conditions, 4779 events. 2988/4779 cut-off events. For 8595/8595 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28951 event pairs, 522 based on Foata normal form. 2/4639 useless extension candidates. Maximal degree in co-relation 13527. Up to 3527 conditions per place. [2025-03-17 06:35:46,922 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 66 selfloop transitions, 17 changer transitions 45/132 dead transitions. [2025-03-17 06:35:46,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1085 flow [2025-03-17 06:35:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:35:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:35:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2025-03-17 06:35:46,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 06:35:46,923 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 679 flow. Second operand 9 states and 150 transitions. [2025-03-17 06:35:46,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1085 flow [2025-03-17 06:35:46,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 1026 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-17 06:35:46,934 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 537 flow [2025-03-17 06:35:46,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=537, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2025-03-17 06:35:46,935 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 53 predicate places. [2025-03-17 06:35:46,935 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 537 flow [2025-03-17 06:35:46,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:46,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:46,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:46,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:35:46,935 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:46,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1737667529, now seen corresponding path program 1 times [2025-03-17 06:35:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280546866] [2025-03-17 06:35:46,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:46,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:35:46,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:35:46,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:46,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280546866] [2025-03-17 06:35:46,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280546866] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:46,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:46,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:35:46,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494149212] [2025-03-17 06:35:46,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:46,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:46,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:46,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:46,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:47,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:47,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:47,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:47,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:47,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:47,243 INFO L124 PetriNetUnfolderBase]: 2010/3162 cut-off events. [2025-03-17 06:35:47,244 INFO L125 PetriNetUnfolderBase]: For 4990/4990 co-relation queries the response was YES. [2025-03-17 06:35:47,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8859 conditions, 3162 events. 2010/3162 cut-off events. For 4990/4990 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17383 event pairs, 1012 based on Foata normal form. 104/3150 useless extension candidates. Maximal degree in co-relation 8818. Up to 1986 conditions per place. [2025-03-17 06:35:47,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 46 selfloop transitions, 2 changer transitions 51/103 dead transitions. [2025-03-17 06:35:47,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 103 transitions, 816 flow [2025-03-17 06:35:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-03-17 06:35:47,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-03-17 06:35:47,259 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 537 flow. Second operand 6 states and 114 transitions. [2025-03-17 06:35:47,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 103 transitions, 816 flow [2025-03-17 06:35:47,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 753 flow, removed 12 selfloop flow, removed 8 redundant places. [2025-03-17 06:35:47,269 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 267 flow [2025-03-17 06:35:47,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2025-03-17 06:35:47,269 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2025-03-17 06:35:47,269 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 267 flow [2025-03-17 06:35:47,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:47,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:47,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:47,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:35:47,270 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:47,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1221922248, now seen corresponding path program 1 times [2025-03-17 06:35:47,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:47,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555967522] [2025-03-17 06:35:47,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:47,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:47,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:35:47,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:35:47,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:47,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:47,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555967522] [2025-03-17 06:35:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555967522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036699918] [2025-03-17 06:35:47,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:47,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:47,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:47,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:35:47,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:35:47,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:35:47,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:47,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:47,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:35:47,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:47,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036699918] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:47,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:47,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2025-03-17 06:35:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663809063] [2025-03-17 06:35:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:47,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:47,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:47,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:35:47,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:35:47,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:47,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:47,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:35:47,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:47,812 INFO L124 PetriNetUnfolderBase]: 1972/2916 cut-off events. [2025-03-17 06:35:47,812 INFO L125 PetriNetUnfolderBase]: For 2642/2642 co-relation queries the response was YES. [2025-03-17 06:35:47,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7728 conditions, 2916 events. 1972/2916 cut-off events. For 2642/2642 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13704 event pairs, 782 based on Foata normal form. 50/2807 useless extension candidates. Maximal degree in co-relation 7704. Up to 903 conditions per place. [2025-03-17 06:35:47,822 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 11 changer transitions 5/117 dead transitions. [2025-03-17 06:35:47,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 117 transitions, 744 flow [2025-03-17 06:35:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:35:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:35:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2025-03-17 06:35:47,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.459375 [2025-03-17 06:35:47,826 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 267 flow. Second operand 8 states and 147 transitions. [2025-03-17 06:35:47,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 117 transitions, 744 flow [2025-03-17 06:35:47,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 117 transitions, 664 flow, removed 38 selfloop flow, removed 12 redundant places. [2025-03-17 06:35:47,832 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 267 flow [2025-03-17 06:35:47,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=267, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2025-03-17 06:35:47,832 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2025-03-17 06:35:47,832 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 267 flow [2025-03-17 06:35:47,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:47,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:47,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:47,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:35:48,033 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 [2025-03-17 06:35:48,033 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:48,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1615704621, now seen corresponding path program 1 times [2025-03-17 06:35:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846171986] [2025-03-17 06:35:48,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:48,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:48,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:35:48,048 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:35:48,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:48,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846171986] [2025-03-17 06:35:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846171986] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:48,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:35:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721641787] [2025-03-17 06:35:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:48,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:48,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:48,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:48,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:48,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:48,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:48,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:48,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:48,265 INFO L124 PetriNetUnfolderBase]: 1355/2044 cut-off events. [2025-03-17 06:35:48,266 INFO L125 PetriNetUnfolderBase]: For 1745/1791 co-relation queries the response was YES. [2025-03-17 06:35:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5215 conditions, 2044 events. 1355/2044 cut-off events. For 1745/1791 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9257 event pairs, 730 based on Foata normal form. 38/1965 useless extension candidates. Maximal degree in co-relation 5200. Up to 1519 conditions per place. [2025-03-17 06:35:48,274 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 2 changer transitions 40/84 dead transitions. [2025-03-17 06:35:48,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 508 flow [2025-03-17 06:35:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2025-03-17 06:35:48,275 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2025-03-17 06:35:48,275 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 267 flow. Second operand 6 states and 111 transitions. [2025-03-17 06:35:48,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 508 flow [2025-03-17 06:35:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 493 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-17 06:35:48,277 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 180 flow [2025-03-17 06:35:48,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2025-03-17 06:35:48,278 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2025-03-17 06:35:48,278 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 180 flow [2025-03-17 06:35:48,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:48,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:48,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:48,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 06:35:48,279 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:48,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1557915826, now seen corresponding path program 1 times [2025-03-17 06:35:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313353761] [2025-03-17 06:35:48,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:48,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:35:48,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:35:48,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:48,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:48,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:48,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313353761] [2025-03-17 06:35:48,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313353761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:48,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:48,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:35:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459708787] [2025-03-17 06:35:48,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:48,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:35:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:48,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:35:48,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:35:48,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:48,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:48,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:48,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:48,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:48,567 INFO L124 PetriNetUnfolderBase]: 1192/1699 cut-off events. [2025-03-17 06:35:48,567 INFO L125 PetriNetUnfolderBase]: For 1032/1077 co-relation queries the response was YES. [2025-03-17 06:35:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4219 conditions, 1699 events. 1192/1699 cut-off events. For 1032/1077 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7087 event pairs, 311 based on Foata normal form. 1/1609 useless extension candidates. Maximal degree in co-relation 4205. Up to 821 conditions per place. [2025-03-17 06:35:48,574 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 53 selfloop transitions, 3 changer transitions 22/82 dead transitions. [2025-03-17 06:35:48,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 459 flow [2025-03-17 06:35:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:35:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:35:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-17 06:35:48,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-17 06:35:48,575 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 180 flow. Second operand 4 states and 95 transitions. [2025-03-17 06:35:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 459 flow [2025-03-17 06:35:48,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 426 flow, removed 13 selfloop flow, removed 7 redundant places. [2025-03-17 06:35:48,577 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 165 flow [2025-03-17 06:35:48,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2025-03-17 06:35:48,579 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2025-03-17 06:35:48,579 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 165 flow [2025-03-17 06:35:48,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:48,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:48,579 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:48,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:35:48,579 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:48,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1158493070, now seen corresponding path program 1 times [2025-03-17 06:35:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472767162] [2025-03-17 06:35:48,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:48,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:35:48,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:35:48,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:48,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472767162] [2025-03-17 06:35:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472767162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726047524] [2025-03-17 06:35:48,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:48,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:48,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:35:48,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:35:48,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:35:48,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:48,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:48,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:35:48,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:49,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726047524] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:49,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 21 [2025-03-17 06:35:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494527434] [2025-03-17 06:35:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:49,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:35:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:49,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:35:49,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2025-03-17 06:35:49,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 165 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2025-03-17 06:35:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:49,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:49,758 INFO L124 PetriNetUnfolderBase]: 2009/2964 cut-off events. [2025-03-17 06:35:49,758 INFO L125 PetriNetUnfolderBase]: For 3071/3196 co-relation queries the response was YES. [2025-03-17 06:35:49,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7527 conditions, 2964 events. 2009/2964 cut-off events. For 3071/3196 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 14085 event pairs, 213 based on Foata normal form. 1/2798 useless extension candidates. Maximal degree in co-relation 7516. Up to 965 conditions per place. [2025-03-17 06:35:49,776 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 101 selfloop transitions, 20 changer transitions 1/126 dead transitions. [2025-03-17 06:35:49,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 126 transitions, 717 flow [2025-03-17 06:35:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:35:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:35:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2025-03-17 06:35:49,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41041666666666665 [2025-03-17 06:35:49,778 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 165 flow. Second operand 12 states and 197 transitions. [2025-03-17 06:35:49,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 126 transitions, 717 flow [2025-03-17 06:35:49,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 126 transitions, 675 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 06:35:49,783 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 274 flow [2025-03-17 06:35:49,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=274, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2025-03-17 06:35:49,784 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2025-03-17 06:35:49,784 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 274 flow [2025-03-17 06:35:49,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2025-03-17 06:35:49,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:49,785 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:49,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:35:49,985 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,SelfDestructingSolverStorable13 [2025-03-17 06:35:49,986 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:49,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -822599190, now seen corresponding path program 2 times [2025-03-17 06:35:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:49,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049138640] [2025-03-17 06:35:49,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:49,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:50,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 26 of 28 statements. [2025-03-17 06:35:50,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:35:50,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049138640] [2025-03-17 06:35:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049138640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:50,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:35:50,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918062968] [2025-03-17 06:35:50,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:50,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:35:50,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:50,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:35:50,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:35:50,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:50,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 274 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:50,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:50,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:50,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:50,692 INFO L124 PetriNetUnfolderBase]: 3024/4447 cut-off events. [2025-03-17 06:35:50,692 INFO L125 PetriNetUnfolderBase]: For 4055/4155 co-relation queries the response was YES. [2025-03-17 06:35:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11890 conditions, 4447 events. 3024/4447 cut-off events. For 4055/4155 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23273 event pairs, 524 based on Foata normal form. 1/4442 useless extension candidates. Maximal degree in co-relation 11876. Up to 1288 conditions per place. [2025-03-17 06:35:50,713 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 25 changer transitions 1/192 dead transitions. [2025-03-17 06:35:50,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 192 transitions, 1182 flow [2025-03-17 06:35:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:35:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:35:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2025-03-17 06:35:50,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-03-17 06:35:50,741 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 274 flow. Second operand 11 states and 235 transitions. [2025-03-17 06:35:50,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 192 transitions, 1182 flow [2025-03-17 06:35:50,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 192 transitions, 1148 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-03-17 06:35:50,749 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 535 flow [2025-03-17 06:35:50,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=535, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2025-03-17 06:35:50,750 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2025-03-17 06:35:50,750 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 535 flow [2025-03-17 06:35:50,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:50,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:50,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:50,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 06:35:50,752 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:50,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2040305660, now seen corresponding path program 3 times [2025-03-17 06:35:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:50,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598025497] [2025-03-17 06:35:50,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:35:50,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:50,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:50,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 26 of 28 statements. [2025-03-17 06:35:50,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:35:50,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598025497] [2025-03-17 06:35:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598025497] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:35:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636358422] [2025-03-17 06:35:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:50,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:35:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:50,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:35:50,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:35:50,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:50,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 535 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:50,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:50,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:50,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:51,495 INFO L124 PetriNetUnfolderBase]: 3609/5178 cut-off events. [2025-03-17 06:35:51,495 INFO L125 PetriNetUnfolderBase]: For 14227/14409 co-relation queries the response was YES. [2025-03-17 06:35:51,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17179 conditions, 5178 events. 3609/5178 cut-off events. For 14227/14409 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26660 event pairs, 1348 based on Foata normal form. 1/5173 useless extension candidates. Maximal degree in co-relation 17157. Up to 2408 conditions per place. [2025-03-17 06:35:51,523 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 128 selfloop transitions, 32 changer transitions 1/165 dead transitions. [2025-03-17 06:35:51,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 165 transitions, 1287 flow [2025-03-17 06:35:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:35:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:35:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2025-03-17 06:35:51,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-17 06:35:51,524 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 535 flow. Second operand 9 states and 186 transitions. [2025-03-17 06:35:51,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 165 transitions, 1287 flow [2025-03-17 06:35:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 165 transitions, 1260 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:51,545 INFO L231 Difference]: Finished difference. Result has 83 places, 94 transitions, 844 flow [2025-03-17 06:35:51,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=83, PETRI_TRANSITIONS=94} [2025-03-17 06:35:51,545 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 46 predicate places. [2025-03-17 06:35:51,545 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 94 transitions, 844 flow [2025-03-17 06:35:51,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:51,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:51,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:51,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 06:35:51,545 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:51,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash 741335866, now seen corresponding path program 4 times [2025-03-17 06:35:51,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:51,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035721712] [2025-03-17 06:35:51,546 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:35:51,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:51,552 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:51,554 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 28 statements. [2025-03-17 06:35:51,554 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:35:51,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:51,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035721712] [2025-03-17 06:35:51,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035721712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029644076] [2025-03-17 06:35:51,678 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:35:51,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:51,681 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) [2025-03-17 06:35:51,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:35:51,731 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:51,742 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 28 statements. [2025-03-17 06:35:51,742 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:35:51,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:51,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:35:51,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:51,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029644076] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:52,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:52,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2025-03-17 06:35:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110242251] [2025-03-17 06:35:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:52,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:52,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:52,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:35:52,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-17 06:35:52,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 94 transitions, 844 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:52,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:52,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-17 06:35:52,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:53,376 INFO L124 PetriNetUnfolderBase]: 9693/13333 cut-off events. [2025-03-17 06:35:53,376 INFO L125 PetriNetUnfolderBase]: For 37722/37722 co-relation queries the response was YES. [2025-03-17 06:35:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43911 conditions, 13333 events. 9693/13333 cut-off events. For 37722/37722 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 71601 event pairs, 521 based on Foata normal form. 2/12747 useless extension candidates. Maximal degree in co-relation 43885. Up to 3596 conditions per place. [2025-03-17 06:35:53,459 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 178 selfloop transitions, 125 changer transitions 2/307 dead transitions. [2025-03-17 06:35:53,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 307 transitions, 2998 flow [2025-03-17 06:35:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:35:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:35:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2025-03-17 06:35:53,460 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2025-03-17 06:35:53,460 INFO L175 Difference]: Start difference. First operand has 83 places, 94 transitions, 844 flow. Second operand 11 states and 222 transitions. [2025-03-17 06:35:53,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 307 transitions, 2998 flow [2025-03-17 06:35:53,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 307 transitions, 2823 flow, removed 86 selfloop flow, removed 1 redundant places. [2025-03-17 06:35:53,582 INFO L231 Difference]: Finished difference. Result has 100 places, 193 transitions, 2304 flow [2025-03-17 06:35:53,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2304, PETRI_PLACES=100, PETRI_TRANSITIONS=193} [2025-03-17 06:35:53,582 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 63 predicate places. [2025-03-17 06:35:53,582 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 193 transitions, 2304 flow [2025-03-17 06:35:53,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:53,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:53,582 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:53,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:35:53,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 06:35:53,783 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:53,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1398660598, now seen corresponding path program 5 times [2025-03-17 06:35:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:53,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645868591] [2025-03-17 06:35:53,784 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:35:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:53,790 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:53,801 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:35:53,801 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:53,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:53,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645868591] [2025-03-17 06:35:53,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645868591] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421136183] [2025-03-17 06:35:53,962 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:35:53,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:53,964 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) [2025-03-17 06:35:53,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:35:54,017 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:54,038 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:35:54,038 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:54,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:54,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:35:54,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:54,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:54,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421136183] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:54,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:54,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 21 [2025-03-17 06:35:54,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495856801] [2025-03-17 06:35:54,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:54,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:35:54,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:54,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:35:54,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2025-03-17 06:35:54,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:54,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 193 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:54,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:54,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:54,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:55,569 INFO L124 PetriNetUnfolderBase]: 8234/11789 cut-off events. [2025-03-17 06:35:55,569 INFO L125 PetriNetUnfolderBase]: For 60441/60775 co-relation queries the response was YES. [2025-03-17 06:35:55,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49308 conditions, 11789 events. 8234/11789 cut-off events. For 60441/60775 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 68460 event pairs, 1203 based on Foata normal form. 55/11806 useless extension candidates. Maximal degree in co-relation 49273. Up to 3460 conditions per place. [2025-03-17 06:35:55,681 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 131 changer transitions 1/352 dead transitions. [2025-03-17 06:35:55,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 352 transitions, 4160 flow [2025-03-17 06:35:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:35:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:35:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2025-03-17 06:35:55,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2025-03-17 06:35:55,682 INFO L175 Difference]: Start difference. First operand has 100 places, 193 transitions, 2304 flow. Second operand 12 states and 235 transitions. [2025-03-17 06:35:55,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 352 transitions, 4160 flow [2025-03-17 06:35:55,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 352 transitions, 3982 flow, removed 82 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:55,895 INFO L231 Difference]: Finished difference. Result has 116 places, 228 transitions, 3170 flow [2025-03-17 06:35:55,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3170, PETRI_PLACES=116, PETRI_TRANSITIONS=228} [2025-03-17 06:35:55,895 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 79 predicate places. [2025-03-17 06:35:55,895 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 228 transitions, 3170 flow [2025-03-17 06:35:55,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:55,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:55,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:55,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:56,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:56,100 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:56,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1964312354, now seen corresponding path program 6 times [2025-03-17 06:35:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370127251] [2025-03-17 06:35:56,100 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:35:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:56,109 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:35:56,117 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-17 06:35:56,117 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:35:56,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:56,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370127251] [2025-03-17 06:35:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370127251] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:56,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:56,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:35:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413562071] [2025-03-17 06:35:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:56,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:35:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:56,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:35:56,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:35:56,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:56,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 228 transitions, 3170 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:56,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:56,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:56,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:57,668 INFO L124 PetriNetUnfolderBase]: 8238/11791 cut-off events. [2025-03-17 06:35:57,668 INFO L125 PetriNetUnfolderBase]: For 74066/74388 co-relation queries the response was YES. [2025-03-17 06:35:57,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51553 conditions, 11791 events. 8238/11791 cut-off events. For 74066/74388 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 68538 event pairs, 1649 based on Foata normal form. 51/11805 useless extension candidates. Maximal degree in co-relation 51511. Up to 4133 conditions per place. [2025-03-17 06:35:57,793 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 100 changer transitions 1/323 dead transitions. [2025-03-17 06:35:57,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 323 transitions, 4338 flow [2025-03-17 06:35:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:35:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:35:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2025-03-17 06:35:57,795 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4775 [2025-03-17 06:35:57,795 INFO L175 Difference]: Start difference. First operand has 116 places, 228 transitions, 3170 flow. Second operand 10 states and 191 transitions. [2025-03-17 06:35:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 323 transitions, 4338 flow [2025-03-17 06:35:58,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 323 transitions, 4194 flow, removed 62 selfloop flow, removed 3 redundant places. [2025-03-17 06:35:58,019 INFO L231 Difference]: Finished difference. Result has 125 places, 231 transitions, 3388 flow [2025-03-17 06:35:58,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3028, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3388, PETRI_PLACES=125, PETRI_TRANSITIONS=231} [2025-03-17 06:35:58,020 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 88 predicate places. [2025-03-17 06:35:58,020 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 231 transitions, 3388 flow [2025-03-17 06:35:58,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:58,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:58,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:58,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 06:35:58,020 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:58,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2109912364, now seen corresponding path program 1 times [2025-03-17 06:35:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:58,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043964502] [2025-03-17 06:35:58,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:58,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:58,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:58,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:58,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:58,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:58,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043964502] [2025-03-17 06:35:58,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043964502] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:58,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:58,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:35:58,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789417031] [2025-03-17 06:35:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:58,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:58,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:58,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:58,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:58,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 231 transitions, 3388 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:58,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:58,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:58,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:58,827 INFO L124 PetriNetUnfolderBase]: 5015/7560 cut-off events. [2025-03-17 06:35:58,827 INFO L125 PetriNetUnfolderBase]: For 41844/42048 co-relation queries the response was YES. [2025-03-17 06:35:58,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32008 conditions, 7560 events. 5015/7560 cut-off events. For 41844/42048 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 45785 event pairs, 1775 based on Foata normal form. 572/8106 useless extension candidates. Maximal degree in co-relation 31963. Up to 3523 conditions per place. [2025-03-17 06:35:58,882 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 179 selfloop transitions, 23 changer transitions 0/209 dead transitions. [2025-03-17 06:35:58,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 2755 flow [2025-03-17 06:35:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:35:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:35:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2025-03-17 06:35:58,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.51 [2025-03-17 06:35:58,883 INFO L175 Difference]: Start difference. First operand has 125 places, 231 transitions, 3388 flow. Second operand 5 states and 102 transitions. [2025-03-17 06:35:58,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 2755 flow [2025-03-17 06:35:58,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 209 transitions, 2627 flow, removed 37 selfloop flow, removed 4 redundant places. [2025-03-17 06:35:58,992 INFO L231 Difference]: Finished difference. Result has 126 places, 166 transitions, 2045 flow [2025-03-17 06:35:58,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2045, PETRI_PLACES=126, PETRI_TRANSITIONS=166} [2025-03-17 06:35:58,992 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2025-03-17 06:35:58,993 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 166 transitions, 2045 flow [2025-03-17 06:35:58,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:58,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:58,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:58,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 06:35:58,993 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:58,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1316286210, now seen corresponding path program 1 times [2025-03-17 06:35:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:58,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163709659] [2025-03-17 06:35:58,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:58,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:59,002 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:59,002 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:59,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163709659] [2025-03-17 06:35:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163709659] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:59,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:35:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452084343] [2025-03-17 06:35:59,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:59,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:59,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:59,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:59,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:59,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 166 transitions, 2045 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:59,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:59,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:59,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:59,509 INFO L124 PetriNetUnfolderBase]: 3187/4963 cut-off events. [2025-03-17 06:35:59,509 INFO L125 PetriNetUnfolderBase]: For 21670/21863 co-relation queries the response was YES. [2025-03-17 06:35:59,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19255 conditions, 4963 events. 3187/4963 cut-off events. For 21670/21863 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29987 event pairs, 1198 based on Foata normal form. 293/5226 useless extension candidates. Maximal degree in co-relation 19211. Up to 2944 conditions per place. [2025-03-17 06:35:59,539 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 73 selfloop transitions, 2 changer transitions 67/149 dead transitions. [2025-03-17 06:35:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1705 flow [2025-03-17 06:35:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:35:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:35:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-17 06:35:59,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-03-17 06:35:59,540 INFO L175 Difference]: Start difference. First operand has 126 places, 166 transitions, 2045 flow. Second operand 5 states and 96 transitions. [2025-03-17 06:35:59,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1705 flow [2025-03-17 06:35:59,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 1590 flow, removed 18 selfloop flow, removed 8 redundant places. [2025-03-17 06:35:59,589 INFO L231 Difference]: Finished difference. Result has 123 places, 82 transitions, 582 flow [2025-03-17 06:35:59,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=123, PETRI_TRANSITIONS=82} [2025-03-17 06:35:59,589 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2025-03-17 06:35:59,590 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 82 transitions, 582 flow [2025-03-17 06:35:59,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:59,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:59,590 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:59,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-17 06:35:59,590 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:59,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1377914690, now seen corresponding path program 1 times [2025-03-17 06:35:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:59,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260901754] [2025-03-17 06:35:59,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:59,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:59,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:59,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:59,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:59,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260901754] [2025-03-17 06:35:59,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260901754] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000921069] [2025-03-17 06:35:59,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:59,671 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) [2025-03-17 06:35:59,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:35:59,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:59,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:59,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:59,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:59,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:35:59,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:59,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:59,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000921069] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:59,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:59,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-17 06:35:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418758477] [2025-03-17 06:35:59,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:59,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:59,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:59,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:35:59,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:35:59,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 82 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:59,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:59,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:35:59,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:00,164 INFO L124 PetriNetUnfolderBase]: 2995/4280 cut-off events. [2025-03-17 06:36:00,164 INFO L125 PetriNetUnfolderBase]: For 14051/14130 co-relation queries the response was YES. [2025-03-17 06:36:00,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16362 conditions, 4280 events. 2995/4280 cut-off events. For 14051/14130 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20144 event pairs, 866 based on Foata normal form. 159/4172 useless extension candidates. Maximal degree in co-relation 16318. Up to 2344 conditions per place. [2025-03-17 06:36:00,191 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 86 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2025-03-17 06:36:00,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 990 flow [2025-03-17 06:36:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2025-03-17 06:36:00,192 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2025-03-17 06:36:00,192 INFO L175 Difference]: Start difference. First operand has 123 places, 82 transitions, 582 flow. Second operand 7 states and 95 transitions. [2025-03-17 06:36:00,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 990 flow [2025-03-17 06:36:00,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 862 flow, removed 62 selfloop flow, removed 17 redundant places. [2025-03-17 06:36:00,217 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 592 flow [2025-03-17 06:36:00,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2025-03-17 06:36:00,217 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2025-03-17 06:36:00,217 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 592 flow [2025-03-17 06:36:00,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:00,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:00,217 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:00,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 06:36:00,418 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,SelfDestructingSolverStorable21 [2025-03-17 06:36:00,418 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:00,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 346608448, now seen corresponding path program 1 times [2025-03-17 06:36:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487154078] [2025-03-17 06:36:00,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:00,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:36:00,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:36:00,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:00,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487154078] [2025-03-17 06:36:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487154078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667084576] [2025-03-17 06:36:00,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:00,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:00,521 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) [2025-03-17 06:36:00,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:36:00,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:36:00,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:36:00,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:00,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:00,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:36:00,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:00,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667084576] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 17 [2025-03-17 06:36:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017352760] [2025-03-17 06:36:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:00,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:00,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:00,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:00,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2025-03-17 06:36:00,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 592 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:00,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:00,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2025-03-17 06:36:00,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:01,217 INFO L124 PetriNetUnfolderBase]: 4022/5719 cut-off events. [2025-03-17 06:36:01,217 INFO L125 PetriNetUnfolderBase]: For 20273/20589 co-relation queries the response was YES. [2025-03-17 06:36:01,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21435 conditions, 5719 events. 4022/5719 cut-off events. For 20273/20589 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27471 event pairs, 1209 based on Foata normal form. 28/5496 useless extension candidates. Maximal degree in co-relation 21404. Up to 2857 conditions per place. [2025-03-17 06:36:01,255 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 102 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2025-03-17 06:36:01,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 1108 flow [2025-03-17 06:36:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2025-03-17 06:36:01,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33214285714285713 [2025-03-17 06:36:01,256 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 592 flow. Second operand 7 states and 93 transitions. [2025-03-17 06:36:01,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 1108 flow [2025-03-17 06:36:01,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1074 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 06:36:01,282 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 632 flow [2025-03-17 06:36:01,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2025-03-17 06:36:01,283 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2025-03-17 06:36:01,283 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 632 flow [2025-03-17 06:36:01,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:01,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:01,283 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:01,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 06:36:01,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:01,484 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:01,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1292809944, now seen corresponding path program 1 times [2025-03-17 06:36:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528645665] [2025-03-17 06:36:01,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:01,490 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:36:01,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:01,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:01,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:02,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:02,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528645665] [2025-03-17 06:36:02,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528645665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:02,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408793722] [2025-03-17 06:36:02,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:02,305 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) [2025-03-17 06:36:02,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:36:02,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:36:02,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:02,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:02,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:02,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 06:36:02,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:02,625 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2025-03-17 06:36:02,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2025-03-17 06:36:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:02,652 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:36:02,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408793722] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:02,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:36:02,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 23 [2025-03-17 06:36:02,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658077831] [2025-03-17 06:36:02,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:02,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:02,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:02,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:02,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:36:02,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:02,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 632 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2025-03-17 06:36:02,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:02,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:02,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:03,650 INFO L124 PetriNetUnfolderBase]: 6069/8755 cut-off events. [2025-03-17 06:36:03,651 INFO L125 PetriNetUnfolderBase]: For 27262/27732 co-relation queries the response was YES. [2025-03-17 06:36:03,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34730 conditions, 8755 events. 6069/8755 cut-off events. For 27262/27732 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 48662 event pairs, 478 based on Foata normal form. 22/8750 useless extension candidates. Maximal degree in co-relation 34697. Up to 3928 conditions per place. [2025-03-17 06:36:03,709 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 210 selfloop transitions, 28 changer transitions 11/255 dead transitions. [2025-03-17 06:36:03,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 255 transitions, 2231 flow [2025-03-17 06:36:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2025-03-17 06:36:03,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-17 06:36:03,715 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 632 flow. Second operand 10 states and 212 transitions. [2025-03-17 06:36:03,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 255 transitions, 2231 flow [2025-03-17 06:36:03,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 255 transitions, 2190 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:03,767 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 921 flow [2025-03-17 06:36:03,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=921, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2025-03-17 06:36:03,768 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2025-03-17 06:36:03,768 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 921 flow [2025-03-17 06:36:03,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2025-03-17 06:36:03,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:03,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:03,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:03,968 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,SelfDestructingSolverStorable23 [2025-03-17 06:36:03,969 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:03,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 445510770, now seen corresponding path program 2 times [2025-03-17 06:36:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:03,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767821064] [2025-03-17 06:36:03,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:03,976 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:03,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 28 of 31 statements. [2025-03-17 06:36:03,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:03,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:04,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:04,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767821064] [2025-03-17 06:36:04,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767821064] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:04,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:04,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-17 06:36:04,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812843105] [2025-03-17 06:36:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:04,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:36:04,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:04,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:36:04,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:36:04,611 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:04,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 921 flow. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:04,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:04,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:04,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:05,796 INFO L124 PetriNetUnfolderBase]: 6401/9293 cut-off events. [2025-03-17 06:36:05,797 INFO L125 PetriNetUnfolderBase]: For 46824/47353 co-relation queries the response was YES. [2025-03-17 06:36:05,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41210 conditions, 9293 events. 6401/9293 cut-off events. For 46824/47353 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 52159 event pairs, 1347 based on Foata normal form. 40/9281 useless extension candidates. Maximal degree in co-relation 41170. Up to 6806 conditions per place. [2025-03-17 06:36:05,864 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 188 selfloop transitions, 39 changer transitions 9/242 dead transitions. [2025-03-17 06:36:05,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 242 transitions, 2368 flow [2025-03-17 06:36:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:36:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:36:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2025-03-17 06:36:05,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4089285714285714 [2025-03-17 06:36:05,865 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 921 flow. Second operand 14 states and 229 transitions. [2025-03-17 06:36:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 242 transitions, 2368 flow [2025-03-17 06:36:05,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 242 transitions, 2329 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:05,953 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 1265 flow [2025-03-17 06:36:05,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1265, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2025-03-17 06:36:05,953 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2025-03-17 06:36:05,953 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 1265 flow [2025-03-17 06:36:05,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:05,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:05,954 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:05,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-17 06:36:05,954 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:05,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1483103548, now seen corresponding path program 3 times [2025-03-17 06:36:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924420361] [2025-03-17 06:36:05,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:05,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:05,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:06,021 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:06,021 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:06,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924420361] [2025-03-17 06:36:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924420361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:06,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522987392] [2025-03-17 06:36:06,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:06,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:06,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:06,537 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) [2025-03-17 06:36:06,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:36:06,597 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:06,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:06,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:06,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:06,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 06:36:06,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:06,854 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2025-03-17 06:36:06,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2025-03-17 06:36:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:06,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:07,593 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2025-03-17 06:36:07,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2025-03-17 06:36:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522987392] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:07,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 26 [2025-03-17 06:36:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373856864] [2025-03-17 06:36:07,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:07,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 06:36:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:07,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 06:36:07,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2025-03-17 06:36:07,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:07,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 1265 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:07,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:07,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:07,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:10,839 INFO L124 PetriNetUnfolderBase]: 8712/12721 cut-off events. [2025-03-17 06:36:10,840 INFO L125 PetriNetUnfolderBase]: For 66116/66871 co-relation queries the response was YES. [2025-03-17 06:36:10,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57838 conditions, 12721 events. 8712/12721 cut-off events. For 66116/66871 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 75011 event pairs, 725 based on Foata normal form. 166/12822 useless extension candidates. Maximal degree in co-relation 57793. Up to 4359 conditions per place. [2025-03-17 06:36:10,968 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 309 selfloop transitions, 91 changer transitions 43/449 dead transitions. [2025-03-17 06:36:10,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 449 transitions, 4383 flow [2025-03-17 06:36:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 06:36:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 06:36:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 487 transitions. [2025-03-17 06:36:10,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4348214285714286 [2025-03-17 06:36:10,970 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 1265 flow. Second operand 28 states and 487 transitions. [2025-03-17 06:36:10,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 449 transitions, 4383 flow [2025-03-17 06:36:11,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 449 transitions, 4253 flow, removed 35 selfloop flow, removed 9 redundant places. [2025-03-17 06:36:11,183 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 2173 flow [2025-03-17 06:36:11,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2173, PETRI_PLACES=147, PETRI_TRANSITIONS=181} [2025-03-17 06:36:11,184 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 110 predicate places. [2025-03-17 06:36:11,184 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 2173 flow [2025-03-17 06:36:11,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:11,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:11,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:11,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 06:36:11,384 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,SelfDestructingSolverStorable25 [2025-03-17 06:36:11,385 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:11,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -364996874, now seen corresponding path program 4 times [2025-03-17 06:36:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:11,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761984608] [2025-03-17 06:36:11,385 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:11,392 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:11,403 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:11,403 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:11,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:11,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:11,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761984608] [2025-03-17 06:36:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761984608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:11,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173366207] [2025-03-17 06:36:11,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:11,676 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) [2025-03-17 06:36:11,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:36:11,736 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:11,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:11,763 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:11,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:11,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-17 06:36:11,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:12,089 INFO L349 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2025-03-17 06:36:12,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 40 [2025-03-17 06:36:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:12,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:12,713 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2025-03-17 06:36:12,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 182 [2025-03-17 06:36:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173366207] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:13,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 28 [2025-03-17 06:36:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828954886] [2025-03-17 06:36:13,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:13,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:36:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:13,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:36:13,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:36:13,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:13,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 181 transitions, 2173 flow. Second operand has 28 states, 28 states have (on average 9.464285714285714) internal successors, (265), 28 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:13,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:13,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:13,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:16,755 INFO L124 PetriNetUnfolderBase]: 10240/15227 cut-off events. [2025-03-17 06:36:16,756 INFO L125 PetriNetUnfolderBase]: For 144593/145628 co-relation queries the response was YES. [2025-03-17 06:36:16,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80429 conditions, 15227 events. 10240/15227 cut-off events. For 144593/145628 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 95681 event pairs, 1023 based on Foata normal form. 168/15321 useless extension candidates. Maximal degree in co-relation 80370. Up to 5331 conditions per place. [2025-03-17 06:36:16,963 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 365 selfloop transitions, 103 changer transitions 25/499 dead transitions. [2025-03-17 06:36:16,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 499 transitions, 5746 flow [2025-03-17 06:36:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 06:36:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-17 06:36:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 539 transitions. [2025-03-17 06:36:16,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4346774193548387 [2025-03-17 06:36:16,964 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 2173 flow. Second operand 31 states and 539 transitions. [2025-03-17 06:36:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 499 transitions, 5746 flow [2025-03-17 06:36:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 499 transitions, 5512 flow, removed 72 selfloop flow, removed 15 redundant places. [2025-03-17 06:36:17,570 INFO L231 Difference]: Finished difference. Result has 170 places, 215 transitions, 2819 flow [2025-03-17 06:36:17,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2819, PETRI_PLACES=170, PETRI_TRANSITIONS=215} [2025-03-17 06:36:17,571 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 133 predicate places. [2025-03-17 06:36:17,571 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 215 transitions, 2819 flow [2025-03-17 06:36:17,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.464285714285714) internal successors, (265), 28 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:17,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:17,571 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:17,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 06:36:17,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 06:36:17,771 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:17,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -774786882, now seen corresponding path program 5 times [2025-03-17 06:36:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281868793] [2025-03-17 06:36:17,772 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:17,777 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:17,800 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:17,800 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:17,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281868793] [2025-03-17 06:36:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281868793] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24925019] [2025-03-17 06:36:18,691 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:18,693 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) [2025-03-17 06:36:18,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 06:36:18,746 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:18,768 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:18,769 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:18,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:18,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 06:36:18,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:18,985 INFO L349 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2025-03-17 06:36:18,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2025-03-17 06:36:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:19,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:39,701 INFO L349 Elim1Store]: treesize reduction 28, result has 89.1 percent of original size [2025-03-17 06:36:39,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 263 [2025-03-17 06:36:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24925019] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:39,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:39,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2025-03-17 06:36:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397875084] [2025-03-17 06:36:39,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:39,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 06:36:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:39,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 06:36:39,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=802, Unknown=5, NotChecked=0, Total=930 [2025-03-17 06:36:43,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 06:36:48,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 06:36:52,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 06:36:52,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2025-03-17 06:36:52,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 215 transitions, 2819 flow. Second operand has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:52,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:52,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2025-03-17 06:36:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:55,241 INFO L124 PetriNetUnfolderBase]: 13764/19489 cut-off events. [2025-03-17 06:36:55,241 INFO L125 PetriNetUnfolderBase]: For 221828/221828 co-relation queries the response was YES. [2025-03-17 06:36:55,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106403 conditions, 19489 events. 13764/19489 cut-off events. For 221828/221828 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 111146 event pairs, 2175 based on Foata normal form. 40/19529 useless extension candidates. Maximal degree in co-relation 106337. Up to 10726 conditions per place. [2025-03-17 06:36:55,487 INFO L140 encePairwiseOnDemand]: 21/40 looper letters, 302 selfloop transitions, 74 changer transitions 26/403 dead transitions. [2025-03-17 06:36:55,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 403 transitions, 5229 flow [2025-03-17 06:36:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 06:36:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 06:36:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 289 transitions. [2025-03-17 06:36:55,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36125 [2025-03-17 06:36:55,489 INFO L175 Difference]: Start difference. First operand has 170 places, 215 transitions, 2819 flow. Second operand 20 states and 289 transitions. [2025-03-17 06:36:55,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 403 transitions, 5229 flow [2025-03-17 06:36:56,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 403 transitions, 4988 flow, removed 77 selfloop flow, removed 12 redundant places. [2025-03-17 06:36:56,434 INFO L231 Difference]: Finished difference. Result has 177 places, 210 transitions, 2676 flow [2025-03-17 06:36:56,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2676, PETRI_PLACES=177, PETRI_TRANSITIONS=210} [2025-03-17 06:36:56,434 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2025-03-17 06:36:56,434 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 210 transitions, 2676 flow [2025-03-17 06:36:56,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:56,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:56,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:56,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 06:36:56,635 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,SelfDestructingSolverStorable27 [2025-03-17 06:36:56,635 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:56,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 109035510, now seen corresponding path program 6 times [2025-03-17 06:36:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28920414] [2025-03-17 06:36:56,636 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:56,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:56,643 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:56,663 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:56,663 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:36:56,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:57,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28920414] [2025-03-17 06:36:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28920414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295944529] [2025-03-17 06:36:57,358 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:57,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:57,360 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) [2025-03-17 06:36:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 06:36:57,417 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:57,438 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:57,438 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:36:57,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:57,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 06:36:57,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:57,673 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2025-03-17 06:36:57,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2025-03-17 06:36:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:57,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:58,401 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2025-03-17 06:36:58,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2025-03-17 06:36:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295944529] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:59,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:59,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 32 [2025-03-17 06:36:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768298200] [2025-03-17 06:36:59,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:59,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 06:36:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:59,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 06:36:59,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2025-03-17 06:36:59,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:36:59,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 210 transitions, 2676 flow. Second operand has 32 states, 32 states have (on average 9.40625) internal successors, (301), 32 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:59,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:59,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:36:59,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand