./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:41:59,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:41:59,129 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:41:59,132 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:41:59,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:41:59,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:41:59,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:41:59,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:41:59,151 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:41:59,151 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:41:59,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:41:59,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:41:59,152 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:41:59,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:41:59,152 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:41:59,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:41:59,153 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:41:59,153 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:41:59,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:41:59,154 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:41:59,155 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2025-03-13 21:41:59,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:41:59,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:41:59,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:41:59,349 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:41:59,349 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:41:59,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-03-13 21:42:00,460 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a96cf780/23b7c9f9c86840a0b7a01b0bf9d15ec1/FLAGe572b9b03 [2025-03-13 21:42:00,652 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:42:00,655 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-03-13 21:42:00,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a96cf780/23b7c9f9c86840a0b7a01b0bf9d15ec1/FLAGe572b9b03 [2025-03-13 21:42:00,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a96cf780/23b7c9f9c86840a0b7a01b0bf9d15ec1 [2025-03-13 21:42:00,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:42:00,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:42:00,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:42:00,672 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:42:00,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:42:00,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230811b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00, skipping insertion in model container [2025-03-13 21:42:00,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:42:00,811 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2025-03-13 21:42:00,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:42:00,830 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:42:00,850 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2025-03-13 21:42:00,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:42:00,866 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:42:00,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00 WrapperNode [2025-03-13 21:42:00,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:42:00,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:42:00,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:42:00,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:42:00,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,905 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 179 [2025-03-13 21:42:00,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:42:00,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:42:00,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:42:00,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:42:00,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,916 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,929 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-13 21:42:00,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,934 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,934 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:42:00,938 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:42:00,938 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:42:00,938 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:42:00,939 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (1/1) ... [2025-03-13 21:42:00,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:42:00,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:00,961 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) [2025-03-13 21:42:00,963 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 [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:42:00,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:42:00,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:42:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:42:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:42:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:42:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:42:00,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:42:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:42:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:42:00,980 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:42:01,057 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:42:01,059 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:42:01,332 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:42:01,332 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:42:01,332 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:42:01,560 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:42:01,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:42:01 BoogieIcfgContainer [2025-03-13 21:42:01,561 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:42:01,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:42:01,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:42:01,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:42:01,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:42:00" (1/3) ... [2025-03-13 21:42:01,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e3ad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:42:01, skipping insertion in model container [2025-03-13 21:42:01,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:00" (2/3) ... [2025-03-13 21:42:01,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e3ad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:42:01, skipping insertion in model container [2025-03-13 21:42:01,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:42:01" (3/3) ... [2025-03-13 21:42:01,567 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2025-03-13 21:42:01,577 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:42:01,578 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-symm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-13 21:42:01,578 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:42:01,618 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:42:01,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2025-03-13 21:42:01,662 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2025-03-13 21:42:01,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:42:01,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2025-03-13 21:42:01,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2025-03-13 21:42:01,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2025-03-13 21:42:01,679 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:42:01,691 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;@7cf56564, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:42:01,692 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:42:01,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:42:01,702 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2025-03-13 21:42:01,702 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:42:01,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:01,703 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:01,703 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:01,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -640687221, now seen corresponding path program 1 times [2025-03-13 21:42:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:01,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194268792] [2025-03-13 21:42:01,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:01,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:42:01,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:42:01,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:01,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:42:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194268792] [2025-03-13 21:42:02,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194268792] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:02,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:02,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:42:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098700913] [2025-03-13 21:42:02,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:02,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:42:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:02,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:42:02,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:42:02,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:02,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:02,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:02,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:02,099 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2025-03-13 21:42:02,099 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-13 21:42:02,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2025-03-13 21:42:02,100 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2025-03-13 21:42:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2025-03-13 21:42:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:42:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:42:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2025-03-13 21:42:02,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2025-03-13 21:42:02,112 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2025-03-13 21:42:02,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2025-03-13 21:42:02,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-13 21:42:02,118 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2025-03-13 21:42:02,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2025-03-13 21:42:02,123 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2025-03-13 21:42:02,123 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2025-03-13 21:42:02,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:02,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:02,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:42:02,125 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:02,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash -449448040, now seen corresponding path program 1 times [2025-03-13 21:42:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527138044] [2025-03-13 21:42:02,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:02,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:42:02,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:42:02,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:02,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:42:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527138044] [2025-03-13 21:42:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527138044] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386929780] [2025-03-13 21:42:02,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:02,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:02,241 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) [2025-03-13 21:42:02,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:42:02,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:42:02,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:42:02,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:02,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:02,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-13 21:42:02,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:42:02,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:42:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386929780] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:02,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:02,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-13 21:42:02,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725711794] [2025-03-13 21:42:02,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:02,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:42:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:02,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:42:02,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:42:02,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:02,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:02,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:02,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:02,471 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2025-03-13 21:42:02,472 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:42:02,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2025-03-13 21:42:02,472 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2025-03-13 21:42:02,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2025-03-13 21:42:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:42:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:42:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2025-03-13 21:42:02,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2025-03-13 21:42:02,474 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2025-03-13 21:42:02,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2025-03-13 21:42:02,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:02,475 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2025-03-13 21:42:02,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2025-03-13 21:42:02,475 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2025-03-13 21:42:02,475 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2025-03-13 21:42:02,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:02,476 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:02,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:02,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:02,680 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:02,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1344505715, now seen corresponding path program 2 times [2025-03-13 21:42:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631331593] [2025-03-13 21:42:02,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:02,693 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:42:02,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-03-13 21:42:02,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:42:02,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-13 21:42:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631331593] [2025-03-13 21:42:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631331593] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908298679] [2025-03-13 21:42:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:02,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:02,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:02,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:02,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:02,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:02,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:02,984 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2025-03-13 21:42:02,985 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:42:02,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2025-03-13 21:42:02,986 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2025-03-13 21:42:02,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2025-03-13 21:42:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2025-03-13 21:42:02,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-03-13 21:42:02,988 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2025-03-13 21:42:02,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2025-03-13 21:42:02,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:02,991 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2025-03-13 21:42:02,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2025-03-13 21:42:02,992 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2025-03-13 21:42:02,992 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2025-03-13 21:42:02,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:02,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:02,993 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:02,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:42:02,993 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:02,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1305307343, now seen corresponding path program 3 times [2025-03-13 21:42:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429849916] [2025-03-13 21:42:02,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:03,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-13 21:42:03,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-03-13 21:42:03,030 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:42:03,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-13 21:42:03,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:03,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429849916] [2025-03-13 21:42:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429849916] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:03,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:03,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560662487] [2025-03-13 21:42:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:03,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:03,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:03,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:03,143 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:03,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:03,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:03,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:03,240 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2025-03-13 21:42:03,241 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-03-13 21:42:03,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 516 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2025-03-13 21:42:03,244 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2025-03-13 21:42:03,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2025-03-13 21:42:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-03-13 21:42:03,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-13 21:42:03,245 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2025-03-13 21:42:03,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2025-03-13 21:42:03,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:03,248 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2025-03-13 21:42:03,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-03-13 21:42:03,249 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2025-03-13 21:42:03,250 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2025-03-13 21:42:03,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:03,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:03,250 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:03,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:42:03,251 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:03,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2079020195, now seen corresponding path program 4 times [2025-03-13 21:42:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:03,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238434448] [2025-03-13 21:42:03,251 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:03,262 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:42:03,273 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:42:03,274 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:03,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:42:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238434448] [2025-03-13 21:42:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238434448] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931316407] [2025-03-13 21:42:03,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:03,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:03,411 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) [2025-03-13 21:42:03,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:42:03,466 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:42:03,494 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:42:03,494 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:03,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:03,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:42:03,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:42:03,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:42:03,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931316407] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:03,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:03,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-13 21:42:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812088487] [2025-03-13 21:42:03,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:03,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:42:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:03,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:42:03,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:42:03,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:03,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:03,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:03,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:03,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:03,676 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2025-03-13 21:42:03,676 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-03-13 21:42:03,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 508 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2025-03-13 21:42:03,678 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2025-03-13 21:42:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2025-03-13 21:42:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:42:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:42:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2025-03-13 21:42:03,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2025-03-13 21:42:03,681 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2025-03-13 21:42:03,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2025-03-13 21:42:03,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:03,684 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2025-03-13 21:42:03,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2025-03-13 21:42:03,686 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2025-03-13 21:42:03,686 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2025-03-13 21:42:03,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:03,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:03,687 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:03,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:03,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:03,887 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:03,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash -517548544, now seen corresponding path program 5 times [2025-03-13 21:42:03,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:03,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521167517] [2025-03-13 21:42:03,888 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:03,900 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 4 equivalence classes. [2025-03-13 21:42:03,922 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:42:03,922 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-13 21:42:03,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:04,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:04,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521167517] [2025-03-13 21:42:04,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521167517] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:04,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:04,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:04,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213782799] [2025-03-13 21:42:04,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:04,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:04,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:04,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:04,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:04,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:04,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:04,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:04,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:04,183 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2025-03-13 21:42:04,183 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-03-13 21:42:04,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 624 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2025-03-13 21:42:04,186 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2025-03-13 21:42:04,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2025-03-13 21:42:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2025-03-13 21:42:04,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-13 21:42:04,188 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2025-03-13 21:42:04,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2025-03-13 21:42:04,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-13 21:42:04,189 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2025-03-13 21:42:04,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2025-03-13 21:42:04,190 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2025-03-13 21:42:04,190 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2025-03-13 21:42:04,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:04,190 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:04,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:42:04,190 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:04,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash -162157616, now seen corresponding path program 6 times [2025-03-13 21:42:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:04,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667238279] [2025-03-13 21:42:04,192 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:04,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:04,204 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 4 equivalence classes. [2025-03-13 21:42:04,212 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 15 of 25 statements. [2025-03-13 21:42:04,217 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:42:04,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:04,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667238279] [2025-03-13 21:42:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667238279] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:04,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:04,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:04,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147165787] [2025-03-13 21:42:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:04,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:04,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:04,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:04,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:04,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:04,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:04,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:04,377 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2025-03-13 21:42:04,378 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2025-03-13 21:42:04,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 454 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2025-03-13 21:42:04,381 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2025-03-13 21:42:04,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2025-03-13 21:42:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-03-13 21:42:04,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-03-13 21:42:04,383 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2025-03-13 21:42:04,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2025-03-13 21:42:04,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:04,385 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2025-03-13 21:42:04,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2025-03-13 21:42:04,385 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-03-13 21:42:04,385 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2025-03-13 21:42:04,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:04,386 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:04,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:42:04,386 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:04,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash 361955509, now seen corresponding path program 1 times [2025-03-13 21:42:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694163190] [2025-03-13 21:42:04,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:04,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:42:04,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:42:04,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:04,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:04,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694163190] [2025-03-13 21:42:04,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694163190] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:04,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:04,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:04,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438681238] [2025-03-13 21:42:04,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:04,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:04,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:04,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:04,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:04,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:04,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:04,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:04,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:04,609 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2025-03-13 21:42:04,609 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2025-03-13 21:42:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 449 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2025-03-13 21:42:04,610 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-03-13 21:42:04,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2025-03-13 21:42:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-03-13 21:42:04,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2025-03-13 21:42:04,611 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2025-03-13 21:42:04,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2025-03-13 21:42:04,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-13 21:42:04,613 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2025-03-13 21:42:04,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2025-03-13 21:42:04,613 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-03-13 21:42:04,613 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2025-03-13 21:42:04,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:04,614 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:04,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-13 21:42:04,614 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:04,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:04,614 INFO L85 PathProgramCache]: Analyzing trace with hash 63274165, now seen corresponding path program 2 times [2025-03-13 21:42:04,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:04,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313686088] [2025-03-13 21:42:04,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:04,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:04,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:42:04,629 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 26 statements. [2025-03-13 21:42:04,629 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:42:04,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:04,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:04,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313686088] [2025-03-13 21:42:04,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313686088] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:04,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:42:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025602193] [2025-03-13 21:42:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:04,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:42:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:04,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:42:04,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:42:04,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:04,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:04,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:04,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:04,783 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2025-03-13 21:42:04,783 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2025-03-13 21:42:04,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 349 event pairs, 25 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2025-03-13 21:42:04,785 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-03-13 21:42:04,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2025-03-13 21:42:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:42:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:42:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-03-13 21:42:04,786 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2025-03-13 21:42:04,786 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2025-03-13 21:42:04,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2025-03-13 21:42:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:04,788 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2025-03-13 21:42:04,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2025-03-13 21:42:04,788 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2025-03-13 21:42:04,788 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2025-03-13 21:42:04,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:04,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:04,789 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:04,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-13 21:42:04,789 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:04,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:04,789 INFO L85 PathProgramCache]: Analyzing trace with hash -689174099, now seen corresponding path program 1 times [2025-03-13 21:42:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111862253] [2025-03-13 21:42:04,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:04,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:04,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:04,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:04,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:05,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:05,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111862253] [2025-03-13 21:42:05,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111862253] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:05,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996250204] [2025-03-13 21:42:05,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:05,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:05,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:05,484 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) [2025-03-13 21:42:05,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:42:05,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:05,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:05,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:05,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:05,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:05,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:05,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:05,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:05,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:06,125 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:06,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2025-03-13 21:42:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:06,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996250204] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:06,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:06,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:06,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338414875] [2025-03-13 21:42:06,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:06,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:06,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:06,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:06,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:06,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:06,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:06,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:06,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:06,606 INFO L124 PetriNetUnfolderBase]: 139/258 cut-off events. [2025-03-13 21:42:06,606 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2025-03-13 21:42:06,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 258 events. 139/258 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 786 event pairs, 12 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 863. Up to 99 conditions per place. [2025-03-13 21:42:06,608 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 55 selfloop transitions, 20 changer transitions 3/79 dead transitions. [2025-03-13 21:42:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 584 flow [2025-03-13 21:42:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:42:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:42:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2025-03-13 21:42:06,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2025-03-13 21:42:06,609 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 12 states and 96 transitions. [2025-03-13 21:42:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 584 flow [2025-03-13 21:42:06,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 550 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-13 21:42:06,611 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 372 flow [2025-03-13 21:42:06,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2025-03-13 21:42:06,611 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-03-13 21:42:06,612 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 372 flow [2025-03-13 21:42:06,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:06,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:06,612 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:06,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:06,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:06,816 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:06,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1133437371, now seen corresponding path program 2 times [2025-03-13 21:42:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714770414] [2025-03-13 21:42:06,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:06,826 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:06,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:06,865 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:06,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714770414] [2025-03-13 21:42:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714770414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965579846] [2025-03-13 21:42:07,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:07,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:07,457 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) [2025-03-13 21:42:07,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:42:07,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:07,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:07,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:07,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:07,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-13 21:42:07,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:07,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:07,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-13 21:42:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:07,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:08,017 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:08,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965579846] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2025-03-13 21:42:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619844473] [2025-03-13 21:42:08,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:08,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:42:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:08,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:42:08,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:42:08,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:08,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 372 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:08,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:08,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:08,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:08,457 INFO L124 PetriNetUnfolderBase]: 159/293 cut-off events. [2025-03-13 21:42:08,457 INFO L125 PetriNetUnfolderBase]: For 771/771 co-relation queries the response was YES. [2025-03-13 21:42:08,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 293 events. 159/293 cut-off events. For 771/771 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 960 event pairs, 23 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1095. Up to 218 conditions per place. [2025-03-13 21:42:08,459 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 50 selfloop transitions, 23 changer transitions 3/77 dead transitions. [2025-03-13 21:42:08,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 640 flow [2025-03-13 21:42:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-03-13 21:42:08,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-03-13 21:42:08,462 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 372 flow. Second operand 13 states and 91 transitions. [2025-03-13 21:42:08,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 640 flow [2025-03-13 21:42:08,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 611 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-13 21:42:08,466 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 478 flow [2025-03-13 21:42:08,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2025-03-13 21:42:08,467 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2025-03-13 21:42:08,468 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 478 flow [2025-03-13 21:42:08,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:08,468 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:08,468 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:08,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-13 21:42:08,668 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 [2025-03-13 21:42:08,669 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:08,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash -707641447, now seen corresponding path program 3 times [2025-03-13 21:42:08,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:08,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367686808] [2025-03-13 21:42:08,669 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:08,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:08,678 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-13 21:42:08,700 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-03-13 21:42:08,701 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:08,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367686808] [2025-03-13 21:42:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367686808] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444366661] [2025-03-13 21:42:09,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:09,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:09,102 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) [2025-03-13 21:42:09,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:42:09,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-13 21:42:09,183 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-03-13 21:42:09,183 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:09,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:09,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-13 21:42:09,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:09,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:09,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-13 21:42:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:09,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:09,578 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:09,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444366661] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:09,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:09,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2025-03-13 21:42:09,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729674612] [2025-03-13 21:42:09,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:09,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:09,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:09,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:09,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:09,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 478 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:09,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:09,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:09,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:10,009 INFO L124 PetriNetUnfolderBase]: 161/301 cut-off events. [2025-03-13 21:42:10,010 INFO L125 PetriNetUnfolderBase]: For 930/930 co-relation queries the response was YES. [2025-03-13 21:42:10,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 301 events. 161/301 cut-off events. For 930/930 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1010 event pairs, 26 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 1264. Up to 215 conditions per place. [2025-03-13 21:42:10,013 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 50 selfloop transitions, 24 changer transitions 2/77 dead transitions. [2025-03-13 21:42:10,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 710 flow [2025-03-13 21:42:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:42:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:42:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 85 transitions. [2025-03-13 21:42:10,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2025-03-13 21:42:10,015 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 478 flow. Second operand 12 states and 85 transitions. [2025-03-13 21:42:10,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 710 flow [2025-03-13 21:42:10,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 650 flow, removed 16 selfloop flow, removed 6 redundant places. [2025-03-13 21:42:10,019 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 507 flow [2025-03-13 21:42:10,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=507, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2025-03-13 21:42:10,021 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2025-03-13 21:42:10,021 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 507 flow [2025-03-13 21:42:10,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:10,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:10,021 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:10,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-13 21:42:10,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-13 21:42:10,226 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:10,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1797758173, now seen corresponding path program 4 times [2025-03-13 21:42:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618693343] [2025-03-13 21:42:10,227 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:10,235 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:10,254 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:10,254 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:10,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618693343] [2025-03-13 21:42:10,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618693343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721384264] [2025-03-13 21:42:10,628 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:10,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:10,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:10,630 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) [2025-03-13 21:42:10,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:42:10,689 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:10,713 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:10,713 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:10,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:10,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:10,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:10,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:10,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:10,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:11,102 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:11,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:11,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721384264] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:11,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:11,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330842269] [2025-03-13 21:42:11,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:11,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:11,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:11,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:11,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:11,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 507 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:11,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:11,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:11,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:11,569 INFO L124 PetriNetUnfolderBase]: 175/326 cut-off events. [2025-03-13 21:42:11,569 INFO L125 PetriNetUnfolderBase]: For 1004/1004 co-relation queries the response was YES. [2025-03-13 21:42:11,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 326 events. 175/326 cut-off events. For 1004/1004 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1124 event pairs, 26 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 1431. Up to 242 conditions per place. [2025-03-13 21:42:11,571 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 59 selfloop transitions, 25 changer transitions 2/87 dead transitions. [2025-03-13 21:42:11,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 815 flow [2025-03-13 21:42:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:42:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:42:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-03-13 21:42:11,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-13 21:42:11,572 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 507 flow. Second operand 12 states and 88 transitions. [2025-03-13 21:42:11,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 815 flow [2025-03-13 21:42:11,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 762 flow, removed 7 selfloop flow, removed 9 redundant places. [2025-03-13 21:42:11,578 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 604 flow [2025-03-13 21:42:11,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=604, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2025-03-13 21:42:11,578 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2025-03-13 21:42:11,579 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 604 flow [2025-03-13 21:42:11,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:11,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:11,580 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:11,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-13 21:42:11,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:11,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:11,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash 938288997, now seen corresponding path program 5 times [2025-03-13 21:42:11,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:11,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633212525] [2025-03-13 21:42:11,782 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:11,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:11,789 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:11,832 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:11,832 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:11,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:42:12,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633212525] [2025-03-13 21:42:12,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633212525] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025758178] [2025-03-13 21:42:12,662 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:12,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:12,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:12,664 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) [2025-03-13 21:42:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:42:12,724 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:12,831 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:12,832 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:12,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:12,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-13 21:42:12,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:12,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-13 21:42:12,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:12,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-13 21:42:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:13,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025758178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2025-03-13 21:42:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080139586] [2025-03-13 21:42:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:13,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-13 21:42:13,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:13,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-13 21:42:13,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2025-03-13 21:42:13,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:13,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 604 flow. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:13,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:13,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:13,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:14,135 INFO L124 PetriNetUnfolderBase]: 179/337 cut-off events. [2025-03-13 21:42:14,136 INFO L125 PetriNetUnfolderBase]: For 1265/1265 co-relation queries the response was YES. [2025-03-13 21:42:14,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 337 events. 179/337 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1198 event pairs, 30 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1618. Up to 241 conditions per place. [2025-03-13 21:42:14,139 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 53 selfloop transitions, 30 changer transitions 3/87 dead transitions. [2025-03-13 21:42:14,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 864 flow [2025-03-13 21:42:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:42:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:42:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 98 transitions. [2025-03-13 21:42:14,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.296969696969697 [2025-03-13 21:42:14,141 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 604 flow. Second operand 15 states and 98 transitions. [2025-03-13 21:42:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 864 flow [2025-03-13 21:42:14,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 795 flow, removed 22 selfloop flow, removed 7 redundant places. [2025-03-13 21:42:14,147 INFO L231 Difference]: Finished difference. Result has 95 places, 70 transitions, 611 flow [2025-03-13 21:42:14,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=611, PETRI_PLACES=95, PETRI_TRANSITIONS=70} [2025-03-13 21:42:14,148 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 73 predicate places. [2025-03-13 21:42:14,148 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 70 transitions, 611 flow [2025-03-13 21:42:14,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:14,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:14,149 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:14,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:14,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:14,353 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:14,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1776244021, now seen corresponding path program 6 times [2025-03-13 21:42:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895350795] [2025-03-13 21:42:14,353 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:14,361 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:14,375 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-03-13 21:42:14,375 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:14,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:14,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895350795] [2025-03-13 21:42:14,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895350795] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:14,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996848681] [2025-03-13 21:42:14,775 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:14,777 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) [2025-03-13 21:42:14,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:42:14,840 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:14,862 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-03-13 21:42:14,862 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:14,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:14,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:14,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:14,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:14,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:14,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:15,248 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:15,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2025-03-13 21:42:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996848681] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:15,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984707009] [2025-03-13 21:42:15,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:15,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:15,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:15,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:15,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 70 transitions, 611 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:16,063 INFO L124 PetriNetUnfolderBase]: 240/455 cut-off events. [2025-03-13 21:42:16,063 INFO L125 PetriNetUnfolderBase]: For 2595/2595 co-relation queries the response was YES. [2025-03-13 21:42:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 455 events. 240/455 cut-off events. For 2595/2595 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1850 event pairs, 31 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 2299. Up to 164 conditions per place. [2025-03-13 21:42:16,065 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 73 selfloop transitions, 40 changer transitions 7/121 dead transitions. [2025-03-13 21:42:16,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 121 transitions, 1264 flow [2025-03-13 21:42:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-13 21:42:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-13 21:42:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 118 transitions. [2025-03-13 21:42:16,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2025-03-13 21:42:16,066 INFO L175 Difference]: Start difference. First operand has 95 places, 70 transitions, 611 flow. Second operand 16 states and 118 transitions. [2025-03-13 21:42:16,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 121 transitions, 1264 flow [2025-03-13 21:42:16,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 1177 flow, removed 3 selfloop flow, removed 15 redundant places. [2025-03-13 21:42:16,072 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 839 flow [2025-03-13 21:42:16,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=839, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2025-03-13 21:42:16,072 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2025-03-13 21:42:16,072 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 839 flow [2025-03-13 21:42:16,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:16,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:16,073 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:16,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:16,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-13 21:42:16,273 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:16,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash -113387339, now seen corresponding path program 7 times [2025-03-13 21:42:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029778414] [2025-03-13 21:42:16,274 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:16,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:16,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:16,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:16,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029778414] [2025-03-13 21:42:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029778414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216337458] [2025-03-13 21:42:16,735 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:16,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:16,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:16,737 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) [2025-03-13 21:42:16,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:42:16,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:16,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:16,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:16,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:16,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:16,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:16,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:16,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:16,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:17,238 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:17,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216337458] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:17,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:17,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606036823] [2025-03-13 21:42:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:17,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:17,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:17,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:17,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:17,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 839 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:17,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:17,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:17,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:17,704 INFO L124 PetriNetUnfolderBase]: 251/477 cut-off events. [2025-03-13 21:42:17,705 INFO L125 PetriNetUnfolderBase]: For 3446/3446 co-relation queries the response was YES. [2025-03-13 21:42:17,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 477 events. 251/477 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1958 event pairs, 75 based on Foata normal form. 4/481 useless extension candidates. Maximal degree in co-relation 2660. Up to 379 conditions per place. [2025-03-13 21:42:17,707 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 76 selfloop transitions, 27 changer transitions 7/111 dead transitions. [2025-03-13 21:42:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 111 transitions, 1263 flow [2025-03-13 21:42:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 93 transitions. [2025-03-13 21:42:17,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2025-03-13 21:42:17,709 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 839 flow. Second operand 13 states and 93 transitions. [2025-03-13 21:42:17,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 111 transitions, 1263 flow [2025-03-13 21:42:17,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1120 flow, removed 48 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:17,718 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 918 flow [2025-03-13 21:42:17,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=918, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2025-03-13 21:42:17,718 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2025-03-13 21:42:17,719 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 918 flow [2025-03-13 21:42:17,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:17,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:17,719 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:17,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:17,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-13 21:42:17,923 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:17,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1073527789, now seen corresponding path program 8 times [2025-03-13 21:42:17,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283913286] [2025-03-13 21:42:17,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:17,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:17,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:17,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:17,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:17,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283913286] [2025-03-13 21:42:18,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283913286] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044755867] [2025-03-13 21:42:18,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:18,322 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) [2025-03-13 21:42:18,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:42:18,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:18,418 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:18,418 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:18,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:18,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:18,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:18,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:18,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:18,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:18,779 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:18,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:18,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044755867] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:18,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:18,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:18,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95330348] [2025-03-13 21:42:18,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:18,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:18,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:18,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:18,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 918 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:19,308 INFO L124 PetriNetUnfolderBase]: 253/478 cut-off events. [2025-03-13 21:42:19,309 INFO L125 PetriNetUnfolderBase]: For 3613/3613 co-relation queries the response was YES. [2025-03-13 21:42:19,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 478 events. 253/478 cut-off events. For 3613/3613 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1949 event pairs, 71 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 2643. Up to 380 conditions per place. [2025-03-13 21:42:19,313 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 86 selfloop transitions, 28 changer transitions 3/118 dead transitions. [2025-03-13 21:42:19,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 118 transitions, 1374 flow [2025-03-13 21:42:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2025-03-13 21:42:19,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3146853146853147 [2025-03-13 21:42:19,314 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 918 flow. Second operand 13 states and 90 transitions. [2025-03-13 21:42:19,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 118 transitions, 1374 flow [2025-03-13 21:42:19,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 118 transitions, 1273 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-03-13 21:42:19,325 INFO L231 Difference]: Finished difference. Result has 116 places, 102 transitions, 1025 flow [2025-03-13 21:42:19,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1025, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2025-03-13 21:42:19,326 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2025-03-13 21:42:19,326 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 1025 flow [2025-03-13 21:42:19,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:19,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:19,326 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:19,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:19,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-13 21:42:19,527 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:19,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1503690447, now seen corresponding path program 9 times [2025-03-13 21:42:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:19,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931179798] [2025-03-13 21:42:19,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:19,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:19,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 27 statements. [2025-03-13 21:42:19,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:19,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:19,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931179798] [2025-03-13 21:42:19,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931179798] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641338689] [2025-03-13 21:42:19,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:19,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:19,839 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) [2025-03-13 21:42:19,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:42:19,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-03-13 21:42:19,920 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 27 statements. [2025-03-13 21:42:19,920 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:19,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:19,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:19,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:19,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:19,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:20,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:20,255 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:20,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641338689] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:20,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:20,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841680143] [2025-03-13 21:42:20,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:20,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:20,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:20,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:20,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:20,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:20,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 1025 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:20,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:20,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:20,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:20,755 INFO L124 PetriNetUnfolderBase]: 252/481 cut-off events. [2025-03-13 21:42:20,755 INFO L125 PetriNetUnfolderBase]: For 3738/3738 co-relation queries the response was YES. [2025-03-13 21:42:20,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 481 events. 252/481 cut-off events. For 3738/3738 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1994 event pairs, 72 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 2672. Up to 372 conditions per place. [2025-03-13 21:42:20,758 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 86 selfloop transitions, 28 changer transitions 4/119 dead transitions. [2025-03-13 21:42:20,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 119 transitions, 1367 flow [2025-03-13 21:42:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:42:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:42:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 86 transitions. [2025-03-13 21:42:20,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32575757575757575 [2025-03-13 21:42:20,759 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 1025 flow. Second operand 12 states and 86 transitions. [2025-03-13 21:42:20,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 119 transitions, 1367 flow [2025-03-13 21:42:20,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 1257 flow, removed 40 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:20,766 INFO L231 Difference]: Finished difference. Result has 120 places, 103 transitions, 1000 flow [2025-03-13 21:42:20,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1000, PETRI_PLACES=120, PETRI_TRANSITIONS=103} [2025-03-13 21:42:20,767 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2025-03-13 21:42:20,767 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 103 transitions, 1000 flow [2025-03-13 21:42:20,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:20,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:20,767 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:20,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:20,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-13 21:42:20,968 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:20,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1145346405, now seen corresponding path program 10 times [2025-03-13 21:42:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012628165] [2025-03-13 21:42:20,969 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:20,976 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:20,990 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:20,990 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:20,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:21,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012628165] [2025-03-13 21:42:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012628165] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677339549] [2025-03-13 21:42:21,349 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:21,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:21,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:21,351 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) [2025-03-13 21:42:21,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:42:21,424 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-13 21:42:21,449 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:21,450 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:21,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:21,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:21,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:21,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:21,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-13 21:42:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:21,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:21,779 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:42:21,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:42:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677339549] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:21,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:21,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-13 21:42:21,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119226082] [2025-03-13 21:42:21,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:21,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:42:21,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:21,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:42:21,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:42:21,849 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:21,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 103 transitions, 1000 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:21,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:21,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:21,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:22,230 INFO L124 PetriNetUnfolderBase]: 252/479 cut-off events. [2025-03-13 21:42:22,230 INFO L125 PetriNetUnfolderBase]: For 3546/3546 co-relation queries the response was YES. [2025-03-13 21:42:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2712 conditions, 479 events. 252/479 cut-off events. For 3546/3546 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1989 event pairs, 74 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 2621. Up to 385 conditions per place. [2025-03-13 21:42:22,234 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 86 selfloop transitions, 27 changer transitions 4/118 dead transitions. [2025-03-13 21:42:22,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 118 transitions, 1316 flow [2025-03-13 21:42:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 88 transitions. [2025-03-13 21:42:22,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2025-03-13 21:42:22,235 INFO L175 Difference]: Start difference. First operand has 120 places, 103 transitions, 1000 flow. Second operand 13 states and 88 transitions. [2025-03-13 21:42:22,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 118 transitions, 1316 flow [2025-03-13 21:42:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1248 flow, removed 7 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:22,244 INFO L231 Difference]: Finished difference. Result has 124 places, 103 transitions, 1012 flow [2025-03-13 21:42:22,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1012, PETRI_PLACES=124, PETRI_TRANSITIONS=103} [2025-03-13 21:42:22,244 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2025-03-13 21:42:22,244 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 103 transitions, 1012 flow [2025-03-13 21:42:22,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:22,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:22,245 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:22,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-13 21:42:22,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:22,446 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:22,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1009895716, now seen corresponding path program 11 times [2025-03-13 21:42:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069031479] [2025-03-13 21:42:22,447 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:22,454 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:22,481 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:22,481 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:22,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-13 21:42:22,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069031479] [2025-03-13 21:42:22,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069031479] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:22,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730880166] [2025-03-13 21:42:22,812 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:22,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:22,814 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) [2025-03-13 21:42:22,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:42:22,885 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:22,929 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:22,929 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:22,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:22,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-13 21:42:22,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:23,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:23,150 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:23,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:42:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730880166] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:23,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:23,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-13 21:42:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681930548] [2025-03-13 21:42:23,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:23,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:42:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:23,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:42:23,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:42:23,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 103 transitions, 1012 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:23,480 INFO L124 PetriNetUnfolderBase]: 262/495 cut-off events. [2025-03-13 21:42:23,480 INFO L125 PetriNetUnfolderBase]: For 3830/3830 co-relation queries the response was YES. [2025-03-13 21:42:23,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 495 events. 262/495 cut-off events. For 3830/3830 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2085 event pairs, 37 based on Foata normal form. 5/500 useless extension candidates. Maximal degree in co-relation 2763. Up to 236 conditions per place. [2025-03-13 21:42:23,484 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 87 selfloop transitions, 45 changer transitions 1/134 dead transitions. [2025-03-13 21:42:23,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 134 transitions, 1532 flow [2025-03-13 21:42:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:42:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:42:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 88 transitions. [2025-03-13 21:42:23,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2025-03-13 21:42:23,485 INFO L175 Difference]: Start difference. First operand has 124 places, 103 transitions, 1012 flow. Second operand 11 states and 88 transitions. [2025-03-13 21:42:23,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 134 transitions, 1532 flow [2025-03-13 21:42:23,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 134 transitions, 1461 flow, removed 9 selfloop flow, removed 12 redundant places. [2025-03-13 21:42:23,494 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 1079 flow [2025-03-13 21:42:23,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1079, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2025-03-13 21:42:23,495 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2025-03-13 21:42:23,495 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 1079 flow [2025-03-13 21:42:23,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:23,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:23,495 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:23,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:23,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2025-03-13 21:42:23,696 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:23,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1285245635, now seen corresponding path program 12 times [2025-03-13 21:42:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938775100] [2025-03-13 21:42:23,696 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:23,711 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:23,736 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:23,736 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:23,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938775100] [2025-03-13 21:42:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938775100] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225077085] [2025-03-13 21:42:24,021 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:24,024 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) [2025-03-13 21:42:24,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-13 21:42:24,103 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:24,121 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:24,122 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:24,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:24,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:24,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:24,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:24,337 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:42:24,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:42:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:24,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225077085] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:24,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:24,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:24,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415365326] [2025-03-13 21:42:24,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:24,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:24,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:24,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:24,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:24,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 1079 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:24,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:24,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:24,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:24,694 INFO L124 PetriNetUnfolderBase]: 265/508 cut-off events. [2025-03-13 21:42:24,694 INFO L125 PetriNetUnfolderBase]: For 4019/4019 co-relation queries the response was YES. [2025-03-13 21:42:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 508 events. 265/508 cut-off events. For 4019/4019 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2232 event pairs, 45 based on Foata normal form. 3/511 useless extension candidates. Maximal degree in co-relation 2857. Up to 186 conditions per place. [2025-03-13 21:42:24,698 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 84 selfloop transitions, 43 changer transitions 16/144 dead transitions. [2025-03-13 21:42:24,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 144 transitions, 1641 flow [2025-03-13 21:42:24,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2025-03-13 21:42:24,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-03-13 21:42:24,699 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 1079 flow. Second operand 9 states and 77 transitions. [2025-03-13 21:42:24,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 144 transitions, 1641 flow [2025-03-13 21:42:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1507 flow, removed 11 selfloop flow, removed 9 redundant places. [2025-03-13 21:42:24,708 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 1096 flow [2025-03-13 21:42:24,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1096, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2025-03-13 21:42:24,708 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2025-03-13 21:42:24,708 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 1096 flow [2025-03-13 21:42:24,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:24,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:24,708 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:24,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:24,909 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:24,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 952067775, now seen corresponding path program 13 times [2025-03-13 21:42:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985814819] [2025-03-13 21:42:24,910 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:24,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:24,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:24,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:24,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:25,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:25,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985814819] [2025-03-13 21:42:25,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985814819] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:25,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095437566] [2025-03-13 21:42:25,329 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:25,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:25,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:25,331 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:25,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-13 21:42:25,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:25,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:25,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:25,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:25,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:25,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:25,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:25,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:25,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:25,685 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:42:25,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:42:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:25,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095437566] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:25,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:25,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:25,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989268660] [2025-03-13 21:42:25,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:25,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:25,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:25,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:25,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:25,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 1096 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:25,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:25,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:25,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:26,039 INFO L124 PetriNetUnfolderBase]: 269/515 cut-off events. [2025-03-13 21:42:26,039 INFO L125 PetriNetUnfolderBase]: For 4349/4349 co-relation queries the response was YES. [2025-03-13 21:42:26,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3089 conditions, 515 events. 269/515 cut-off events. For 4349/4349 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2203 event pairs, 58 based on Foata normal form. 4/519 useless extension candidates. Maximal degree in co-relation 2994. Up to 200 conditions per place. [2025-03-13 21:42:26,043 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 88 selfloop transitions, 43 changer transitions 2/134 dead transitions. [2025-03-13 21:42:26,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 134 transitions, 1577 flow [2025-03-13 21:42:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2025-03-13 21:42:26,044 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2025-03-13 21:42:26,044 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 1096 flow. Second operand 9 states and 83 transitions. [2025-03-13 21:42:26,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 134 transitions, 1577 flow [2025-03-13 21:42:26,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 134 transitions, 1463 flow, removed 33 selfloop flow, removed 6 redundant places. [2025-03-13 21:42:26,054 INFO L231 Difference]: Finished difference. Result has 128 places, 107 transitions, 1104 flow [2025-03-13 21:42:26,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1104, PETRI_PLACES=128, PETRI_TRANSITIONS=107} [2025-03-13 21:42:26,055 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 106 predicate places. [2025-03-13 21:42:26,055 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 107 transitions, 1104 flow [2025-03-13 21:42:26,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:26,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:26,055 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:26,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-13 21:42:26,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:26,260 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:26,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2123224340, now seen corresponding path program 14 times [2025-03-13 21:42:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485267691] [2025-03-13 21:42:26,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:26,270 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:26,284 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:26,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:26,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:26,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485267691] [2025-03-13 21:42:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485267691] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92186239] [2025-03-13 21:42:26,678 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:26,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:26,680 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-13 21:42:26,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:26,790 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:26,790 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:26,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:26,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:26,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:26,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:27,061 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:27,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:42:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92186239] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:27,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408012722] [2025-03-13 21:42:27,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:27,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:27,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:27,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:27,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:27,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 107 transitions, 1104 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:27,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:27,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:27,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:27,630 INFO L124 PetriNetUnfolderBase]: 297/563 cut-off events. [2025-03-13 21:42:27,630 INFO L125 PetriNetUnfolderBase]: For 4751/4751 co-relation queries the response was YES. [2025-03-13 21:42:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3321 conditions, 563 events. 297/563 cut-off events. For 4751/4751 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2485 event pairs, 37 based on Foata normal form. 5/568 useless extension candidates. Maximal degree in co-relation 3227. Up to 237 conditions per place. [2025-03-13 21:42:27,634 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 102 selfloop transitions, 54 changer transitions 1/158 dead transitions. [2025-03-13 21:42:27,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 1808 flow [2025-03-13 21:42:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-13 21:42:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-13 21:42:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2025-03-13 21:42:27,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2025-03-13 21:42:27,636 INFO L175 Difference]: Start difference. First operand has 128 places, 107 transitions, 1104 flow. Second operand 16 states and 130 transitions. [2025-03-13 21:42:27,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 1808 flow [2025-03-13 21:42:27,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 1710 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-13 21:42:27,647 INFO L231 Difference]: Finished difference. Result has 138 places, 112 transitions, 1196 flow [2025-03-13 21:42:27,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1196, PETRI_PLACES=138, PETRI_TRANSITIONS=112} [2025-03-13 21:42:27,647 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 116 predicate places. [2025-03-13 21:42:27,647 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 112 transitions, 1196 flow [2025-03-13 21:42:27,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:27,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:27,647 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:27,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:27,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-13 21:42:27,848 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:27,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1900909951, now seen corresponding path program 15 times [2025-03-13 21:42:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:27,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620523029] [2025-03-13 21:42:27,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:27,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:27,855 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:27,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:27,865 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:27,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:28,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620523029] [2025-03-13 21:42:28,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620523029] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128183098] [2025-03-13 21:42:28,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:28,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:28,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:28,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:28,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-13 21:42:28,366 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:28,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:28,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:28,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:28,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:28,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:28,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:28,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:28,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:28,641 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:42:28,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:42:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:28,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128183098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:28,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:28,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474305730] [2025-03-13 21:42:28,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:28,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:28,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:28,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:28,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:28,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 112 transitions, 1196 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:28,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:28,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:28,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:29,220 INFO L124 PetriNetUnfolderBase]: 298/571 cut-off events. [2025-03-13 21:42:29,220 INFO L125 PetriNetUnfolderBase]: For 4998/4998 co-relation queries the response was YES. [2025-03-13 21:42:29,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 571 events. 298/571 cut-off events. For 4998/4998 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2561 event pairs, 73 based on Foata normal form. 3/574 useless extension candidates. Maximal degree in co-relation 3334. Up to 238 conditions per place. [2025-03-13 21:42:29,224 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 92 selfloop transitions, 43 changer transitions 7/143 dead transitions. [2025-03-13 21:42:29,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 143 transitions, 1685 flow [2025-03-13 21:42:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:42:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:42:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2025-03-13 21:42:29,226 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-13 21:42:29,226 INFO L175 Difference]: Start difference. First operand has 138 places, 112 transitions, 1196 flow. Second operand 10 states and 90 transitions. [2025-03-13 21:42:29,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 143 transitions, 1685 flow [2025-03-13 21:42:29,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 143 transitions, 1572 flow, removed 15 selfloop flow, removed 15 redundant places. [2025-03-13 21:42:29,238 INFO L231 Difference]: Finished difference. Result has 133 places, 112 transitions, 1175 flow [2025-03-13 21:42:29,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1175, PETRI_PLACES=133, PETRI_TRANSITIONS=112} [2025-03-13 21:42:29,239 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2025-03-13 21:42:29,239 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 112 transitions, 1175 flow [2025-03-13 21:42:29,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:29,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:29,239 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:29,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-13 21:42:29,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:29,440 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:29,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1707713370, now seen corresponding path program 16 times [2025-03-13 21:42:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:29,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460438231] [2025-03-13 21:42:29,440 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:29,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:29,459 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:29,459 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:29,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460438231] [2025-03-13 21:42:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460438231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200168932] [2025-03-13 21:42:29,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:29,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:29,847 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:29,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-13 21:42:29,926 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:29,956 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:29,956 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:29,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:29,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:29,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:30,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:30,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:30,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:30,172 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:30,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:42:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:30,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200168932] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:30,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:30,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158525695] [2025-03-13 21:42:30,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:30,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:30,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:30,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:30,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:30,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 112 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:30,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:30,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:30,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:30,577 INFO L124 PetriNetUnfolderBase]: 323/617 cut-off events. [2025-03-13 21:42:30,578 INFO L125 PetriNetUnfolderBase]: For 5131/5131 co-relation queries the response was YES. [2025-03-13 21:42:30,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 617 events. 323/617 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2813 event pairs, 41 based on Foata normal form. 5/622 useless extension candidates. Maximal degree in co-relation 3584. Up to 223 conditions per place. [2025-03-13 21:42:30,582 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 101 selfloop transitions, 57 changer transitions 3/162 dead transitions. [2025-03-13 21:42:30,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 162 transitions, 1890 flow [2025-03-13 21:42:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:42:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:42:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 124 transitions. [2025-03-13 21:42:30,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2025-03-13 21:42:30,583 INFO L175 Difference]: Start difference. First operand has 133 places, 112 transitions, 1175 flow. Second operand 15 states and 124 transitions. [2025-03-13 21:42:30,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 162 transitions, 1890 flow [2025-03-13 21:42:30,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 162 transitions, 1804 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:30,595 INFO L231 Difference]: Finished difference. Result has 140 places, 117 transitions, 1294 flow [2025-03-13 21:42:30,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1294, PETRI_PLACES=140, PETRI_TRANSITIONS=117} [2025-03-13 21:42:30,595 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 118 predicate places. [2025-03-13 21:42:30,595 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 117 transitions, 1294 flow [2025-03-13 21:42:30,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:30,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:30,595 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:30,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:30,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:30,796 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:30,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1686550445, now seen corresponding path program 17 times [2025-03-13 21:42:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120611880] [2025-03-13 21:42:30,797 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:30,804 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:30,822 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:30,822 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:30,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-13 21:42:31,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120611880] [2025-03-13 21:42:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120611880] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166200309] [2025-03-13 21:42:31,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:31,211 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-13 21:42:31,315 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:31,469 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:31,469 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:31,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:31,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-13 21:42:31,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:31,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:31,777 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:42:31,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:42:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166200309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:31,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2025-03-13 21:42:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831310276] [2025-03-13 21:42:31,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:31,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-13 21:42:31,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:31,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-13 21:42:31,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2025-03-13 21:42:31,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:31,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 117 transitions, 1294 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:31,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:31,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:31,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:32,247 INFO L124 PetriNetUnfolderBase]: 316/601 cut-off events. [2025-03-13 21:42:32,247 INFO L125 PetriNetUnfolderBase]: For 5444/5444 co-relation queries the response was YES. [2025-03-13 21:42:32,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 601 events. 316/601 cut-off events. For 5444/5444 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2710 event pairs, 84 based on Foata normal form. 3/604 useless extension candidates. Maximal degree in co-relation 3671. Up to 295 conditions per place. [2025-03-13 21:42:32,253 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 84 selfloop transitions, 47 changer transitions 9/141 dead transitions. [2025-03-13 21:42:32,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 141 transitions, 1732 flow [2025-03-13 21:42:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:42:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:42:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 86 transitions. [2025-03-13 21:42:32,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35537190082644626 [2025-03-13 21:42:32,254 INFO L175 Difference]: Start difference. First operand has 140 places, 117 transitions, 1294 flow. Second operand 11 states and 86 transitions. [2025-03-13 21:42:32,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 141 transitions, 1732 flow [2025-03-13 21:42:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 141 transitions, 1606 flow, removed 11 selfloop flow, removed 11 redundant places. [2025-03-13 21:42:32,266 INFO L231 Difference]: Finished difference. Result has 141 places, 117 transitions, 1273 flow [2025-03-13 21:42:32,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1273, PETRI_PLACES=141, PETRI_TRANSITIONS=117} [2025-03-13 21:42:32,267 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2025-03-13 21:42:32,267 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 117 transitions, 1273 flow [2025-03-13 21:42:32,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:32,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:32,267 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:32,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-13 21:42:32,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:32,468 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:32,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1633516170, now seen corresponding path program 18 times [2025-03-13 21:42:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406573311] [2025-03-13 21:42:32,468 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:32,475 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:32,484 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:32,484 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:32,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:32,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406573311] [2025-03-13 21:42:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406573311] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408497925] [2025-03-13 21:42:32,793 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:32,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:32,795 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:32,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-13 21:42:32,886 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:32,996 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:32,996 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:32,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:32,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-13 21:42:32,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:33,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:33,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-03-13 21:42:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:33,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:33,207 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:33,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:42:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408497925] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:33,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2025-03-13 21:42:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512927111] [2025-03-13 21:42:33,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:33,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:33,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:33,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:33,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:33,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:33,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 117 transitions, 1273 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:33,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:33,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:33,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:33,721 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2025-03-13 21:42:33,722 INFO L125 PetriNetUnfolderBase]: For 4990/4990 co-relation queries the response was YES. [2025-03-13 21:42:33,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3573 conditions, 574 events. 307/574 cut-off events. For 4990/4990 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2511 event pairs, 32 based on Foata normal form. 2/576 useless extension candidates. Maximal degree in co-relation 3480. Up to 201 conditions per place. [2025-03-13 21:42:33,726 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 93 selfloop transitions, 58 changer transitions 3/155 dead transitions. [2025-03-13 21:42:33,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 155 transitions, 1858 flow [2025-03-13 21:42:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-13 21:42:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-13 21:42:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2025-03-13 21:42:33,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2025-03-13 21:42:33,727 INFO L175 Difference]: Start difference. First operand has 141 places, 117 transitions, 1273 flow. Second operand 16 states and 123 transitions. [2025-03-13 21:42:33,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 155 transitions, 1858 flow [2025-03-13 21:42:33,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1759 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:33,739 INFO L231 Difference]: Finished difference. Result has 143 places, 115 transitions, 1274 flow [2025-03-13 21:42:33,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1274, PETRI_PLACES=143, PETRI_TRANSITIONS=115} [2025-03-13 21:42:33,739 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2025-03-13 21:42:33,739 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 115 transitions, 1274 flow [2025-03-13 21:42:33,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:33,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:33,740 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:33,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:33,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-13 21:42:33,940 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:33,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -521759981, now seen corresponding path program 19 times [2025-03-13 21:42:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959719151] [2025-03-13 21:42:33,941 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:33,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:33,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:33,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:33,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959719151] [2025-03-13 21:42:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959719151] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911754425] [2025-03-13 21:42:34,267 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:34,269 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:34,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-13 21:42:34,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:34,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:34,381 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:34,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:34,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:34,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:34,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:34,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:34,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:34,563 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:34,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:34,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911754425] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:34,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:34,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535815282] [2025-03-13 21:42:34,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:34,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:34,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:34,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:34,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 115 transitions, 1274 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:34,961 INFO L124 PetriNetUnfolderBase]: 330/621 cut-off events. [2025-03-13 21:42:34,962 INFO L125 PetriNetUnfolderBase]: For 6234/6234 co-relation queries the response was YES. [2025-03-13 21:42:34,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3931 conditions, 621 events. 330/621 cut-off events. For 6234/6234 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2782 event pairs, 114 based on Foata normal form. 4/625 useless extension candidates. Maximal degree in co-relation 3836. Up to 471 conditions per place. [2025-03-13 21:42:34,967 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 114 selfloop transitions, 34 changer transitions 2/151 dead transitions. [2025-03-13 21:42:34,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 151 transitions, 1824 flow [2025-03-13 21:42:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:42:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:42:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-13 21:42:34,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-13 21:42:34,968 INFO L175 Difference]: Start difference. First operand has 143 places, 115 transitions, 1274 flow. Second operand 14 states and 110 transitions. [2025-03-13 21:42:34,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 151 transitions, 1824 flow [2025-03-13 21:42:34,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 151 transitions, 1677 flow, removed 0 selfloop flow, removed 15 redundant places. [2025-03-13 21:42:34,983 INFO L231 Difference]: Finished difference. Result has 142 places, 120 transitions, 1308 flow [2025-03-13 21:42:34,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1308, PETRI_PLACES=142, PETRI_TRANSITIONS=120} [2025-03-13 21:42:34,983 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2025-03-13 21:42:34,983 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 120 transitions, 1308 flow [2025-03-13 21:42:34,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:34,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:34,984 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:34,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-13 21:42:35,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-13 21:42:35,184 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:35,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1757778267, now seen corresponding path program 20 times [2025-03-13 21:42:35,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:35,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776646846] [2025-03-13 21:42:35,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:35,193 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:35,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:35,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:35,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:35,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:35,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776646846] [2025-03-13 21:42:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776646846] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:35,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971676518] [2025-03-13 21:42:35,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:35,676 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-13 21:42:35,773 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:35,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:35,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:35,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:35,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-13 21:42:35,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:35,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:36,032 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:36,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971676518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:36,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:36,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-13 21:42:36,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425815788] [2025-03-13 21:42:36,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:36,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:42:36,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:36,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:42:36,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:42:36,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 120 transitions, 1308 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:36,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:36,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:36,463 INFO L124 PetriNetUnfolderBase]: 342/655 cut-off events. [2025-03-13 21:42:36,464 INFO L125 PetriNetUnfolderBase]: For 7348/7348 co-relation queries the response was YES. [2025-03-13 21:42:36,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4096 conditions, 655 events. 342/655 cut-off events. For 7348/7348 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3059 event pairs, 120 based on Foata normal form. 6/661 useless extension candidates. Maximal degree in co-relation 3999. Up to 499 conditions per place. [2025-03-13 21:42:36,470 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 114 selfloop transitions, 32 changer transitions 9/156 dead transitions. [2025-03-13 21:42:36,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 156 transitions, 1913 flow [2025-03-13 21:42:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2025-03-13 21:42:36,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3531468531468531 [2025-03-13 21:42:36,471 INFO L175 Difference]: Start difference. First operand has 142 places, 120 transitions, 1308 flow. Second operand 13 states and 101 transitions. [2025-03-13 21:42:36,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 156 transitions, 1913 flow [2025-03-13 21:42:36,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 156 transitions, 1803 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-03-13 21:42:36,485 INFO L231 Difference]: Finished difference. Result has 150 places, 123 transitions, 1355 flow [2025-03-13 21:42:36,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1355, PETRI_PLACES=150, PETRI_TRANSITIONS=123} [2025-03-13 21:42:36,486 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2025-03-13 21:42:36,486 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 123 transitions, 1355 flow [2025-03-13 21:42:36,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:36,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:36,486 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:36,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-13 21:42:36,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-13 21:42:36,687 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:36,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:36,687 INFO L85 PathProgramCache]: Analyzing trace with hash 706233048, now seen corresponding path program 21 times [2025-03-13 21:42:36,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:36,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307742573] [2025-03-13 21:42:36,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:36,694 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:36,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:36,701 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:36,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:37,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307742573] [2025-03-13 21:42:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307742573] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726700869] [2025-03-13 21:42:37,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:37,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:37,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:37,031 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:37,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-13 21:42:37,125 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:37,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:37,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:37,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:37,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:42:37,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:37,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:37,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:37,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:37,331 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:37,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:37,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726700869] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:37,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:37,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:42:37,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934872368] [2025-03-13 21:42:37,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:37,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:42:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:37,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:42:37,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:42:37,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:37,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 123 transitions, 1355 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:37,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:37,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:37,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:37,754 INFO L124 PetriNetUnfolderBase]: 346/662 cut-off events. [2025-03-13 21:42:37,754 INFO L125 PetriNetUnfolderBase]: For 8194/8194 co-relation queries the response was YES. [2025-03-13 21:42:37,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4219 conditions, 662 events. 346/662 cut-off events. For 8194/8194 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3090 event pairs, 124 based on Foata normal form. 5/667 useless extension candidates. Maximal degree in co-relation 4117. Up to 524 conditions per place. [2025-03-13 21:42:37,759 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 31 changer transitions 1/140 dead transitions. [2025-03-13 21:42:37,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 140 transitions, 1752 flow [2025-03-13 21:42:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2025-03-13 21:42:37,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2025-03-13 21:42:37,761 INFO L175 Difference]: Start difference. First operand has 150 places, 123 transitions, 1355 flow. Second operand 9 states and 74 transitions. [2025-03-13 21:42:37,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 140 transitions, 1752 flow [2025-03-13 21:42:37,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 1654 flow, removed 23 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:37,779 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1358 flow [2025-03-13 21:42:37,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2025-03-13 21:42:37,779 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2025-03-13 21:42:37,779 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1358 flow [2025-03-13 21:42:37,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:37,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:37,780 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:37,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-13 21:42:37,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:37,980 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:37,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1247291422, now seen corresponding path program 22 times [2025-03-13 21:42:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292037314] [2025-03-13 21:42:37,981 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:37,989 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:38,002 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:38,002 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:38,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292037314] [2025-03-13 21:42:38,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292037314] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270437996] [2025-03-13 21:42:38,316 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:38,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:38,318 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:38,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-13 21:42:38,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:38,446 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:38,447 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:38,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:38,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:38,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:38,513 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:42:38,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-13 21:42:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:38,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:38,617 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:38,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:38,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270437996] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:38,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207046645] [2025-03-13 21:42:38,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:38,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:38,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:38,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:38,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:38,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1358 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:38,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:38,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:38,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:38,925 INFO L124 PetriNetUnfolderBase]: 353/674 cut-off events. [2025-03-13 21:42:38,925 INFO L125 PetriNetUnfolderBase]: For 8013/8013 co-relation queries the response was YES. [2025-03-13 21:42:38,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4281 conditions, 674 events. 353/674 cut-off events. For 8013/8013 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3175 event pairs, 138 based on Foata normal form. 5/679 useless extension candidates. Maximal degree in co-relation 4179. Up to 572 conditions per place. [2025-03-13 21:42:38,930 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 113 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2025-03-13 21:42:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 140 transitions, 1757 flow [2025-03-13 21:42:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2025-03-13 21:42:38,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-03-13 21:42:38,931 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1358 flow. Second operand 9 states and 69 transitions. [2025-03-13 21:42:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 140 transitions, 1757 flow [2025-03-13 21:42:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 140 transitions, 1682 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-03-13 21:42:38,949 INFO L231 Difference]: Finished difference. Result has 151 places, 125 transitions, 1373 flow [2025-03-13 21:42:38,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1373, PETRI_PLACES=151, PETRI_TRANSITIONS=125} [2025-03-13 21:42:38,949 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-03-13 21:42:38,949 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 125 transitions, 1373 flow [2025-03-13 21:42:38,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:38,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:38,949 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:38,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:39,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:39,150 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:39,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1787868298, now seen corresponding path program 23 times [2025-03-13 21:42:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:39,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479281109] [2025-03-13 21:42:39,151 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:39,161 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:39,181 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:39,181 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:39,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-13 21:42:39,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479281109] [2025-03-13 21:42:39,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479281109] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406211370] [2025-03-13 21:42:39,616 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:39,618 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:39,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-13 21:42:39,720 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:39,777 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:39,777 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:39,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:39,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-13 21:42:39,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:39,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-13 21:42:39,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:39,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-03-13 21:42:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:39,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406211370] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:40,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-13 21:42:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870253166] [2025-03-13 21:42:40,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:40,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:42:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:40,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:42:40,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:42:40,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:40,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 125 transitions, 1373 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:40,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:40,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:40,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:40,541 INFO L124 PetriNetUnfolderBase]: 351/672 cut-off events. [2025-03-13 21:42:40,541 INFO L125 PetriNetUnfolderBase]: For 7490/7490 co-relation queries the response was YES. [2025-03-13 21:42:40,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4208 conditions, 672 events. 351/672 cut-off events. For 7490/7490 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3168 event pairs, 130 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 4105. Up to 548 conditions per place. [2025-03-13 21:42:40,545 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 106 selfloop transitions, 32 changer transitions 6/145 dead transitions. [2025-03-13 21:42:40,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 145 transitions, 1757 flow [2025-03-13 21:42:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:42:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:42:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2025-03-13 21:42:40,546 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3446969696969697 [2025-03-13 21:42:40,546 INFO L175 Difference]: Start difference. First operand has 151 places, 125 transitions, 1373 flow. Second operand 12 states and 91 transitions. [2025-03-13 21:42:40,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 145 transitions, 1757 flow [2025-03-13 21:42:40,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 145 transitions, 1685 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-03-13 21:42:40,562 INFO L231 Difference]: Finished difference. Result has 155 places, 123 transitions, 1345 flow [2025-03-13 21:42:40,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1345, PETRI_PLACES=155, PETRI_TRANSITIONS=123} [2025-03-13 21:42:40,562 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2025-03-13 21:42:40,562 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 123 transitions, 1345 flow [2025-03-13 21:42:40,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:40,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:40,563 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:40,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:40,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-13 21:42:40,763 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:40,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:40,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1667522910, now seen corresponding path program 24 times [2025-03-13 21:42:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:40,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460530562] [2025-03-13 21:42:40,764 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:40,771 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:40,780 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:40,781 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:40,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:41,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460530562] [2025-03-13 21:42:41,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460530562] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143383980] [2025-03-13 21:42:41,088 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:41,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:41,090 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-13 21:42:41,195 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:41,213 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:41,213 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:41,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:41,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:42:41,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:41,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:41,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:41,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:41,387 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:41,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143383980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:41,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:42:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30898236] [2025-03-13 21:42:41,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:41,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:42:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:41,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:42:41,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:42:41,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:41,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 123 transitions, 1345 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:41,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:41,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:41,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:41,839 INFO L124 PetriNetUnfolderBase]: 362/695 cut-off events. [2025-03-13 21:42:41,839 INFO L125 PetriNetUnfolderBase]: For 7763/7763 co-relation queries the response was YES. [2025-03-13 21:42:41,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4323 conditions, 695 events. 362/695 cut-off events. For 7763/7763 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3307 event pairs, 126 based on Foata normal form. 5/700 useless extension candidates. Maximal degree in co-relation 4217. Up to 549 conditions per place. [2025-03-13 21:42:41,843 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 34 changer transitions 3/160 dead transitions. [2025-03-13 21:42:41,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 160 transitions, 1933 flow [2025-03-13 21:42:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:42:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:42:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-13 21:42:41,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-13 21:42:41,844 INFO L175 Difference]: Start difference. First operand has 155 places, 123 transitions, 1345 flow. Second operand 14 states and 110 transitions. [2025-03-13 21:42:41,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 160 transitions, 1933 flow [2025-03-13 21:42:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 160 transitions, 1864 flow, removed 1 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:41,862 INFO L231 Difference]: Finished difference. Result has 160 places, 126 transitions, 1412 flow [2025-03-13 21:42:41,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1412, PETRI_PLACES=160, PETRI_TRANSITIONS=126} [2025-03-13 21:42:41,863 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2025-03-13 21:42:41,863 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 126 transitions, 1412 flow [2025-03-13 21:42:41,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:41,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:41,863 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:41,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:42,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-03-13 21:42:42,064 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:42,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:42,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2064378688, now seen corresponding path program 25 times [2025-03-13 21:42:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:42,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106162471] [2025-03-13 21:42:42,064 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:42,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:42,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:42,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:42,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:42,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106162471] [2025-03-13 21:42:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106162471] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688935865] [2025-03-13 21:42:42,424 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:42,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:42,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-13 21:42:42,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:42,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:42,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:42,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:42,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:42,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:42,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:42,712 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:42,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:42,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688935865] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:42,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:42,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:42:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142983189] [2025-03-13 21:42:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:42,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:42:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:42,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:42:42,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:42:42,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 126 transitions, 1412 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:43,020 INFO L124 PetriNetUnfolderBase]: 356/677 cut-off events. [2025-03-13 21:42:43,020 INFO L125 PetriNetUnfolderBase]: For 7471/7471 co-relation queries the response was YES. [2025-03-13 21:42:43,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 677 events. 356/677 cut-off events. For 7471/7471 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3150 event pairs, 140 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 4194. Up to 591 conditions per place. [2025-03-13 21:42:43,025 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 22 changer transitions 7/137 dead transitions. [2025-03-13 21:42:43,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 137 transitions, 1725 flow [2025-03-13 21:42:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2025-03-13 21:42:43,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-13 21:42:43,027 INFO L175 Difference]: Start difference. First operand has 160 places, 126 transitions, 1412 flow. Second operand 9 states and 66 transitions. [2025-03-13 21:42:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 137 transitions, 1725 flow [2025-03-13 21:42:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 137 transitions, 1624 flow, removed 19 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:43,048 INFO L231 Difference]: Finished difference. Result has 158 places, 123 transitions, 1323 flow [2025-03-13 21:42:43,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1323, PETRI_PLACES=158, PETRI_TRANSITIONS=123} [2025-03-13 21:42:43,049 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2025-03-13 21:42:43,049 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 123 transitions, 1323 flow [2025-03-13 21:42:43,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:43,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:43,049 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:43,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:43,249 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:43,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash 133343040, now seen corresponding path program 26 times [2025-03-13 21:42:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070210808] [2025-03-13 21:42:43,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:43,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:43,271 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:43,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:43,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:43,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070210808] [2025-03-13 21:42:43,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070210808] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462129385] [2025-03-13 21:42:43,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:43,684 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:43,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-13 21:42:43,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:43,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:43,840 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:43,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:43,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:43,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:43,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:43,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:43,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:44,035 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:44,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:44,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462129385] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:44,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:44,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:44,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232683596] [2025-03-13 21:42:44,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:44,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:44,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:44,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:44,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:44,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:44,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 123 transitions, 1323 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:44,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:44,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:44,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:44,434 INFO L124 PetriNetUnfolderBase]: 349/654 cut-off events. [2025-03-13 21:42:44,434 INFO L125 PetriNetUnfolderBase]: For 6630/6630 co-relation queries the response was YES. [2025-03-13 21:42:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 654 events. 349/654 cut-off events. For 6630/6630 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2949 event pairs, 124 based on Foata normal form. 2/656 useless extension candidates. Maximal degree in co-relation 3969. Up to 530 conditions per place. [2025-03-13 21:42:44,439 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 30 changer transitions 2/140 dead transitions. [2025-03-13 21:42:44,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 140 transitions, 1688 flow [2025-03-13 21:42:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:42:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:42:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2025-03-13 21:42:44,440 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33884297520661155 [2025-03-13 21:42:44,440 INFO L175 Difference]: Start difference. First operand has 158 places, 123 transitions, 1323 flow. Second operand 11 states and 82 transitions. [2025-03-13 21:42:44,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 140 transitions, 1688 flow [2025-03-13 21:42:44,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 140 transitions, 1626 flow, removed 6 selfloop flow, removed 9 redundant places. [2025-03-13 21:42:44,457 INFO L231 Difference]: Finished difference. Result has 154 places, 121 transitions, 1300 flow [2025-03-13 21:42:44,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1300, PETRI_PLACES=154, PETRI_TRANSITIONS=121} [2025-03-13 21:42:44,458 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2025-03-13 21:42:44,458 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 121 transitions, 1300 flow [2025-03-13 21:42:44,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:44,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:44,458 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:44,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:44,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:44,659 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:44,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 105735861, now seen corresponding path program 27 times [2025-03-13 21:42:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032814099] [2025-03-13 21:42:44,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:44,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:44,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:44,681 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:44,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032814099] [2025-03-13 21:42:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032814099] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037677290] [2025-03-13 21:42:44,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:44,963 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:44,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-13 21:42:45,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:45,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:45,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:45,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:45,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-13 21:42:45,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:45,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:45,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:45,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:45,319 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:45,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037677290] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:45,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:45,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-13 21:42:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327335554] [2025-03-13 21:42:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:45,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:42:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:45,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:42:45,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:42:45,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:45,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 121 transitions, 1300 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:45,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:45,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:45,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:45,738 INFO L124 PetriNetUnfolderBase]: 338/632 cut-off events. [2025-03-13 21:42:45,738 INFO L125 PetriNetUnfolderBase]: For 6555/6555 co-relation queries the response was YES. [2025-03-13 21:42:45,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3952 conditions, 632 events. 338/632 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2826 event pairs, 113 based on Foata normal form. 6/638 useless extension candidates. Maximal degree in co-relation 3848. Up to 500 conditions per place. [2025-03-13 21:42:45,745 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 110 selfloop transitions, 30 changer transitions 3/144 dead transitions. [2025-03-13 21:42:45,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 144 transitions, 1708 flow [2025-03-13 21:42:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:42:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:42:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2025-03-13 21:42:45,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33916083916083917 [2025-03-13 21:42:45,747 INFO L175 Difference]: Start difference. First operand has 154 places, 121 transitions, 1300 flow. Second operand 13 states and 97 transitions. [2025-03-13 21:42:45,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 144 transitions, 1708 flow [2025-03-13 21:42:45,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 144 transitions, 1646 flow, removed 1 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:45,765 INFO L231 Difference]: Finished difference. Result has 153 places, 118 transitions, 1274 flow [2025-03-13 21:42:45,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1274, PETRI_PLACES=153, PETRI_TRANSITIONS=118} [2025-03-13 21:42:45,767 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2025-03-13 21:42:45,767 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 118 transitions, 1274 flow [2025-03-13 21:42:45,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:45,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:45,767 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:45,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-13 21:42:45,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:45,968 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:45,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1380961893, now seen corresponding path program 28 times [2025-03-13 21:42:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:45,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348515144] [2025-03-13 21:42:45,969 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:45,975 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:46,004 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:46,005 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:46,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:46,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348515144] [2025-03-13 21:42:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348515144] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456727479] [2025-03-13 21:42:46,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:46,382 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:46,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-13 21:42:46,491 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:46,514 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:46,514 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:46,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:46,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:42:46,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:46,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:46,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:46,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:46,684 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:46,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456727479] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:46,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:46,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:42:46,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929604451] [2025-03-13 21:42:46,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:46,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:42:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:46,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:42:46,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:42:46,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:46,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 118 transitions, 1274 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:46,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:46,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:46,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:46,993 INFO L124 PetriNetUnfolderBase]: 329/611 cut-off events. [2025-03-13 21:42:46,993 INFO L125 PetriNetUnfolderBase]: For 6336/6336 co-relation queries the response was YES. [2025-03-13 21:42:46,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3851 conditions, 611 events. 329/611 cut-off events. For 6336/6336 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2680 event pairs, 120 based on Foata normal form. 4/615 useless extension candidates. Maximal degree in co-relation 3748. Up to 509 conditions per place. [2025-03-13 21:42:46,997 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 103 selfloop transitions, 27 changer transitions 0/131 dead transitions. [2025-03-13 21:42:46,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 131 transitions, 1586 flow [2025-03-13 21:42:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2025-03-13 21:42:46,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2025-03-13 21:42:46,998 INFO L175 Difference]: Start difference. First operand has 153 places, 118 transitions, 1274 flow. Second operand 9 states and 71 transitions. [2025-03-13 21:42:46,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 131 transitions, 1586 flow [2025-03-13 21:42:47,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 131 transitions, 1513 flow, removed 4 selfloop flow, removed 12 redundant places. [2025-03-13 21:42:47,012 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 1235 flow [2025-03-13 21:42:47,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1235, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2025-03-13 21:42:47,013 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2025-03-13 21:42:47,013 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 1235 flow [2025-03-13 21:42:47,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:47,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:47,013 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:47,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-13 21:42:47,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-13 21:42:47,213 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:47,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash 480392447, now seen corresponding path program 29 times [2025-03-13 21:42:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:47,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920659195] [2025-03-13 21:42:47,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:47,221 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:47,237 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:47,237 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:47,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-13 21:42:47,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:47,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920659195] [2025-03-13 21:42:47,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920659195] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:47,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343139184] [2025-03-13 21:42:47,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:47,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:47,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:47,540 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:47,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-13 21:42:47,647 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:47,694 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:47,694 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:47,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:47,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-13 21:42:47,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:47,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:47,907 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:47,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343139184] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:47,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-03-13 21:42:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121763892] [2025-03-13 21:42:47,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:47,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:42:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:47,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:42:47,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:42:47,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:47,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 1235 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:47,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:47,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:47,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:48,158 INFO L124 PetriNetUnfolderBase]: 330/607 cut-off events. [2025-03-13 21:42:48,158 INFO L125 PetriNetUnfolderBase]: For 6334/6334 co-relation queries the response was YES. [2025-03-13 21:42:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 607 events. 330/607 cut-off events. For 6334/6334 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2627 event pairs, 122 based on Foata normal form. 4/611 useless extension candidates. Maximal degree in co-relation 3696. Up to 520 conditions per place. [2025-03-13 21:42:48,163 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 101 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2025-03-13 21:42:48,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 129 transitions, 1558 flow [2025-03-13 21:42:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:42:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:42:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2025-03-13 21:42:48,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2025-03-13 21:42:48,164 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 1235 flow. Second operand 10 states and 72 transitions. [2025-03-13 21:42:48,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 129 transitions, 1558 flow [2025-03-13 21:42:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 129 transitions, 1497 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:48,180 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 1235 flow [2025-03-13 21:42:48,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1235, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2025-03-13 21:42:48,181 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2025-03-13 21:42:48,181 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 1235 flow [2025-03-13 21:42:48,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:48,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:48,181 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:48,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-13 21:42:48,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-13 21:42:48,382 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:48,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2026947199, now seen corresponding path program 30 times [2025-03-13 21:42:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:48,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659470766] [2025-03-13 21:42:48,383 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:48,390 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:48,398 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:48,398 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:48,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659470766] [2025-03-13 21:42:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659470766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615386481] [2025-03-13 21:42:48,683 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:48,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:48,685 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:48,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-13 21:42:48,798 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:48,817 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:48,817 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:48,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:48,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:48,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:48,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:48,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:48,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:49,015 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:49,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:49,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615386481] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:49,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:49,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41552648] [2025-03-13 21:42:49,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:49,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:49,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:49,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:49,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:49,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 1235 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:49,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:49,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:49,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:49,331 INFO L124 PetriNetUnfolderBase]: 326/594 cut-off events. [2025-03-13 21:42:49,331 INFO L125 PetriNetUnfolderBase]: For 6338/6338 co-relation queries the response was YES. [2025-03-13 21:42:49,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 594 events. 326/594 cut-off events. For 6338/6338 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2575 event pairs, 115 based on Foata normal form. 3/597 useless extension candidates. Maximal degree in co-relation 3633. Up to 506 conditions per place. [2025-03-13 21:42:49,335 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 98 selfloop transitions, 26 changer transitions 3/128 dead transitions. [2025-03-13 21:42:49,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 128 transitions, 1535 flow [2025-03-13 21:42:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:42:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:42:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2025-03-13 21:42:49,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2025-03-13 21:42:49,336 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 1235 flow. Second operand 10 states and 72 transitions. [2025-03-13 21:42:49,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 128 transitions, 1535 flow [2025-03-13 21:42:49,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 128 transitions, 1474 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:49,350 INFO L231 Difference]: Finished difference. Result has 145 places, 114 transitions, 1211 flow [2025-03-13 21:42:49,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1211, PETRI_PLACES=145, PETRI_TRANSITIONS=114} [2025-03-13 21:42:49,350 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2025-03-13 21:42:49,350 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 114 transitions, 1211 flow [2025-03-13 21:42:49,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:49,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:49,350 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:49,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-13 21:42:49,551 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:49,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1478203315, now seen corresponding path program 31 times [2025-03-13 21:42:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885623805] [2025-03-13 21:42:49,551 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:49,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:49,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:49,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:49,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885623805] [2025-03-13 21:42:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885623805] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220944708] [2025-03-13 21:42:49,863 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:49,865 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-13 21:42:49,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:49,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:49,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:49,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:50,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:50,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:50,050 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:42:50,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-13 21:42:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:50,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:50,139 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:50,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:50,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220944708] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:50,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:50,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273582090] [2025-03-13 21:42:50,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:50,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:50,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:50,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:50,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:50,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 114 transitions, 1211 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:50,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:50,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:50,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:50,364 INFO L124 PetriNetUnfolderBase]: 337/610 cut-off events. [2025-03-13 21:42:50,364 INFO L125 PetriNetUnfolderBase]: For 6807/6807 co-relation queries the response was YES. [2025-03-13 21:42:50,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3858 conditions, 610 events. 337/610 cut-off events. For 6807/6807 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2632 event pairs, 115 based on Foata normal form. 4/614 useless extension candidates. Maximal degree in co-relation 3757. Up to 505 conditions per place. [2025-03-13 21:42:50,369 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 103 selfloop transitions, 24 changer transitions 0/128 dead transitions. [2025-03-13 21:42:50,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 128 transitions, 1580 flow [2025-03-13 21:42:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2025-03-13 21:42:50,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2025-03-13 21:42:50,369 INFO L175 Difference]: Start difference. First operand has 145 places, 114 transitions, 1211 flow. Second operand 9 states and 67 transitions. [2025-03-13 21:42:50,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 128 transitions, 1580 flow [2025-03-13 21:42:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 128 transitions, 1516 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-03-13 21:42:50,385 INFO L231 Difference]: Finished difference. Result has 143 places, 116 transitions, 1255 flow [2025-03-13 21:42:50,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=143, PETRI_TRANSITIONS=116} [2025-03-13 21:42:50,385 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2025-03-13 21:42:50,385 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 116 transitions, 1255 flow [2025-03-13 21:42:50,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:50,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:50,386 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:50,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-13 21:42:50,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-13 21:42:50,586 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:50,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1282803085, now seen corresponding path program 32 times [2025-03-13 21:42:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:50,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38979580] [2025-03-13 21:42:50,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:50,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:50,604 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:50,604 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:50,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:50,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:50,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38979580] [2025-03-13 21:42:50,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38979580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:50,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402023601] [2025-03-13 21:42:50,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:50,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:50,989 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:50,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-13 21:42:51,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:51,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:51,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:51,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:51,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-13 21:42:51,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:51,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:51,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:51,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:51,340 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:51,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402023601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:51,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:51,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-13 21:42:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14273244] [2025-03-13 21:42:51,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:51,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:42:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:51,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:42:51,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:42:51,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:51,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 116 transitions, 1255 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:51,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:51,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:51,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:51,808 INFO L124 PetriNetUnfolderBase]: 348/639 cut-off events. [2025-03-13 21:42:51,808 INFO L125 PetriNetUnfolderBase]: For 8390/8390 co-relation queries the response was YES. [2025-03-13 21:42:51,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 639 events. 348/639 cut-off events. For 8390/8390 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2828 event pairs, 104 based on Foata normal form. 15/654 useless extension candidates. Maximal degree in co-relation 4032. Up to 477 conditions per place. [2025-03-13 21:42:51,812 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 111 selfloop transitions, 28 changer transitions 10/150 dead transitions. [2025-03-13 21:42:51,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 150 transitions, 1859 flow [2025-03-13 21:42:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:42:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:42:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 116 transitions. [2025-03-13 21:42:51,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2025-03-13 21:42:51,812 INFO L175 Difference]: Start difference. First operand has 143 places, 116 transitions, 1255 flow. Second operand 15 states and 116 transitions. [2025-03-13 21:42:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 150 transitions, 1859 flow [2025-03-13 21:42:51,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 150 transitions, 1785 flow, removed 15 selfloop flow, removed 6 redundant places. [2025-03-13 21:42:51,829 INFO L231 Difference]: Finished difference. Result has 155 places, 114 transitions, 1298 flow [2025-03-13 21:42:51,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1298, PETRI_PLACES=155, PETRI_TRANSITIONS=114} [2025-03-13 21:42:51,830 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2025-03-13 21:42:51,830 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 114 transitions, 1298 flow [2025-03-13 21:42:51,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:51,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:51,830 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:51,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-13 21:42:52,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:52,031 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:52,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 747573283, now seen corresponding path program 33 times [2025-03-13 21:42:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444599559] [2025-03-13 21:42:52,031 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:52,039 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:52,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:52,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:52,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:52,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:52,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444599559] [2025-03-13 21:42:52,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444599559] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:52,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397798360] [2025-03-13 21:42:52,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:52,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:52,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:52,360 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:52,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-13 21:42:52,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:52,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:42:52,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:42:52,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:52,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:42:52,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:52,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:52,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:52,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:52,723 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:42:52,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:42:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397798360] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:52,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:52,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:42:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558758577] [2025-03-13 21:42:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:52,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:42:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:52,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:42:52,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:42:52,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 114 transitions, 1298 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:52,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:52,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:53,165 INFO L124 PetriNetUnfolderBase]: 347/634 cut-off events. [2025-03-13 21:42:53,165 INFO L125 PetriNetUnfolderBase]: For 9010/9010 co-relation queries the response was YES. [2025-03-13 21:42:53,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4195 conditions, 634 events. 347/634 cut-off events. For 9010/9010 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2768 event pairs, 20 based on Foata normal form. 6/640 useless extension candidates. Maximal degree in co-relation 4106. Up to 249 conditions per place. [2025-03-13 21:42:53,168 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 53 changer transitions 6/150 dead transitions. [2025-03-13 21:42:53,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 150 transitions, 1948 flow [2025-03-13 21:42:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:42:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:42:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-13 21:42:53,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-13 21:42:53,169 INFO L175 Difference]: Start difference. First operand has 155 places, 114 transitions, 1298 flow. Second operand 14 states and 110 transitions. [2025-03-13 21:42:53,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 150 transitions, 1948 flow [2025-03-13 21:42:53,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 150 transitions, 1795 flow, removed 52 selfloop flow, removed 11 redundant places. [2025-03-13 21:42:53,189 INFO L231 Difference]: Finished difference. Result has 155 places, 116 transitions, 1355 flow [2025-03-13 21:42:53,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1355, PETRI_PLACES=155, PETRI_TRANSITIONS=116} [2025-03-13 21:42:53,190 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2025-03-13 21:42:53,190 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 116 transitions, 1355 flow [2025-03-13 21:42:53,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:53,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:53,190 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:53,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2025-03-13 21:42:53,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2025-03-13 21:42:53,391 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:53,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1884768118, now seen corresponding path program 34 times [2025-03-13 21:42:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:53,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378139043] [2025-03-13 21:42:53,391 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:53,399 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:53,409 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:53,409 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:53,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378139043] [2025-03-13 21:42:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378139043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230196316] [2025-03-13 21:42:53,687 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:42:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:53,689 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:53,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-13 21:42:53,808 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:53,831 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:53,831 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:42:53,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:53,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:53,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:53,891 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:42:53,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-13 21:42:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:53,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:53,981 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:53,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230196316] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:54,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805054392] [2025-03-13 21:42:54,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:54,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:54,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:54,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:54,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:54,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 116 transitions, 1355 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:54,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:54,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:54,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:54,265 INFO L124 PetriNetUnfolderBase]: 348/629 cut-off events. [2025-03-13 21:42:54,265 INFO L125 PetriNetUnfolderBase]: For 8594/8594 co-relation queries the response was YES. [2025-03-13 21:42:54,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 629 events. 348/629 cut-off events. For 8594/8594 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2707 event pairs, 119 based on Foata normal form. 5/634 useless extension candidates. Maximal degree in co-relation 4047. Up to 534 conditions per place. [2025-03-13 21:42:54,270 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 109 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2025-03-13 21:42:54,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 131 transitions, 1740 flow [2025-03-13 21:42:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2025-03-13 21:42:54,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2025-03-13 21:42:54,270 INFO L175 Difference]: Start difference. First operand has 155 places, 116 transitions, 1355 flow. Second operand 9 states and 68 transitions. [2025-03-13 21:42:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 131 transitions, 1740 flow [2025-03-13 21:42:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 131 transitions, 1573 flow, removed 35 selfloop flow, removed 13 redundant places. [2025-03-13 21:42:54,290 INFO L231 Difference]: Finished difference. Result has 150 places, 117 transitions, 1270 flow [2025-03-13 21:42:54,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1270, PETRI_PLACES=150, PETRI_TRANSITIONS=117} [2025-03-13 21:42:54,291 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2025-03-13 21:42:54,291 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 117 transitions, 1270 flow [2025-03-13 21:42:54,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:54,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:54,291 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:54,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-03-13 21:42:54,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:54,492 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:54,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 511651917, now seen corresponding path program 35 times [2025-03-13 21:42:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721199814] [2025-03-13 21:42:54,492 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:54,499 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:54,517 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:54,517 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:54,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:42:55,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721199814] [2025-03-13 21:42:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721199814] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677677766] [2025-03-13 21:42:55,340 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:42:55,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:55,342 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:55,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-13 21:42:55,465 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:55,512 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:55,512 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:42:55,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:55,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-13 21:42:55,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:55,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:55,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2025-03-13 21:42:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:55,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:55,887 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:55,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-03-13 21:42:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:55,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677677766] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:55,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:55,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 8] total 34 [2025-03-13 21:42:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72620619] [2025-03-13 21:42:55,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:55,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-13 21:42:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:55,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-13 21:42:55,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2025-03-13 21:42:55,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:55,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 117 transitions, 1270 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:55,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:55,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:55,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:56,609 INFO L124 PetriNetUnfolderBase]: 363/670 cut-off events. [2025-03-13 21:42:56,609 INFO L125 PetriNetUnfolderBase]: For 9153/9153 co-relation queries the response was YES. [2025-03-13 21:42:56,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 670 events. 363/670 cut-off events. For 9153/9153 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2981 event pairs, 115 based on Foata normal form. 13/683 useless extension candidates. Maximal degree in co-relation 4129. Up to 514 conditions per place. [2025-03-13 21:42:56,613 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 109 selfloop transitions, 35 changer transitions 1/146 dead transitions. [2025-03-13 21:42:56,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 146 transitions, 1783 flow [2025-03-13 21:42:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:42:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:42:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 111 transitions. [2025-03-13 21:42:56,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2025-03-13 21:42:56,614 INFO L175 Difference]: Start difference. First operand has 150 places, 117 transitions, 1270 flow. Second operand 15 states and 111 transitions. [2025-03-13 21:42:56,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 146 transitions, 1783 flow [2025-03-13 21:42:56,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 146 transitions, 1703 flow, removed 12 selfloop flow, removed 8 redundant places. [2025-03-13 21:42:56,634 INFO L231 Difference]: Finished difference. Result has 158 places, 120 transitions, 1344 flow [2025-03-13 21:42:56,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1344, PETRI_PLACES=158, PETRI_TRANSITIONS=120} [2025-03-13 21:42:56,635 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2025-03-13 21:42:56,635 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 120 transitions, 1344 flow [2025-03-13 21:42:56,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:56,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:56,635 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:56,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-03-13 21:42:56,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:56,835 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:56,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2054349450, now seen corresponding path program 36 times [2025-03-13 21:42:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493932063] [2025-03-13 21:42:56,836 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:56,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:56,846 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:56,860 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:56,860 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:56,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:57,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:57,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493932063] [2025-03-13 21:42:57,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493932063] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:57,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160068153] [2025-03-13 21:42:57,258 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:42:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:57,260 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:57,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-13 21:42:57,381 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:42:57,399 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:42:57,399 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:42:57,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:57,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:42:57,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:57,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:57,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:42:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:57,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:57,618 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:42:57,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:42:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:57,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160068153] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:57,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:57,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:42:57,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479628875] [2025-03-13 21:42:57,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:57,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:42:57,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:57,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:42:57,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:42:57,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:57,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 120 transitions, 1344 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:57,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:57,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:58,007 INFO L124 PetriNetUnfolderBase]: 355/657 cut-off events. [2025-03-13 21:42:58,007 INFO L125 PetriNetUnfolderBase]: For 6561/6561 co-relation queries the response was YES. [2025-03-13 21:42:58,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 657 events. 355/657 cut-off events. For 6561/6561 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2892 event pairs, 73 based on Foata normal form. 5/662 useless extension candidates. Maximal degree in co-relation 3962. Up to 352 conditions per place. [2025-03-13 21:42:58,012 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 87 selfloop transitions, 51 changer transitions 0/139 dead transitions. [2025-03-13 21:42:58,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 139 transitions, 1758 flow [2025-03-13 21:42:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:42:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:42:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2025-03-13 21:42:58,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2025-03-13 21:42:58,012 INFO L175 Difference]: Start difference. First operand has 158 places, 120 transitions, 1344 flow. Second operand 9 states and 76 transitions. [2025-03-13 21:42:58,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 139 transitions, 1758 flow [2025-03-13 21:42:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 139 transitions, 1597 flow, removed 42 selfloop flow, removed 20 redundant places. [2025-03-13 21:42:58,029 INFO L231 Difference]: Finished difference. Result has 147 places, 121 transitions, 1328 flow [2025-03-13 21:42:58,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1328, PETRI_PLACES=147, PETRI_TRANSITIONS=121} [2025-03-13 21:42:58,030 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2025-03-13 21:42:58,030 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 121 transitions, 1328 flow [2025-03-13 21:42:58,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:58,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:58,030 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:58,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-03-13 21:42:58,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2025-03-13 21:42:58,230 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:58,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash 333960909, now seen corresponding path program 37 times [2025-03-13 21:42:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:58,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308294336] [2025-03-13 21:42:58,231 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:58,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:58,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:58,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:58,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308294336] [2025-03-13 21:42:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308294336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923350052] [2025-03-13 21:42:58,563 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:42:58,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:58,565 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:58,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-13 21:42:58,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:42:58,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:58,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:58,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:58,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:42:58,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:58,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:42:58,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:42:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:58,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:58,867 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:42:58,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:42:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:42:58,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923350052] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:58,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:58,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:42:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369223403] [2025-03-13 21:42:58,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:58,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:42:58,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:58,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:42:58,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:42:58,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:42:58,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 121 transitions, 1328 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:58,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:58,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:42:58,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:59,235 INFO L124 PetriNetUnfolderBase]: 356/653 cut-off events. [2025-03-13 21:42:59,236 INFO L125 PetriNetUnfolderBase]: For 4956/4956 co-relation queries the response was YES. [2025-03-13 21:42:59,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3974 conditions, 653 events. 356/653 cut-off events. For 4956/4956 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2876 event pairs, 111 based on Foata normal form. 4/657 useless extension candidates. Maximal degree in co-relation 3878. Up to 531 conditions per place. [2025-03-13 21:42:59,240 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 108 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2025-03-13 21:42:59,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 137 transitions, 1696 flow [2025-03-13 21:42:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:42:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:42:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2025-03-13 21:42:59,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2025-03-13 21:42:59,241 INFO L175 Difference]: Start difference. First operand has 147 places, 121 transitions, 1328 flow. Second operand 11 states and 79 transitions. [2025-03-13 21:42:59,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 137 transitions, 1696 flow [2025-03-13 21:42:59,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 137 transitions, 1598 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-03-13 21:42:59,257 INFO L231 Difference]: Finished difference. Result has 150 places, 122 transitions, 1304 flow [2025-03-13 21:42:59,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1304, PETRI_PLACES=150, PETRI_TRANSITIONS=122} [2025-03-13 21:42:59,258 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2025-03-13 21:42:59,258 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 122 transitions, 1304 flow [2025-03-13 21:42:59,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:59,258 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:59,258 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:59,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-03-13 21:42:59,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-03-13 21:42:59,459 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:42:59,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash -349993176, now seen corresponding path program 38 times [2025-03-13 21:42:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:59,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806465342] [2025-03-13 21:42:59,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:59,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:42:59,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:42:59,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:42:59,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:59,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806465342] [2025-03-13 21:42:59,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806465342] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159581927] [2025-03-13 21:42:59,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:59,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:59,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:59,868 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:59,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-13 21:43:00,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:43:00,033 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:00,033 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:00,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:00,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:43:00,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:00,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:00,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:43:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:00,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:00,228 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-13 21:43:00,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-13 21:43:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:00,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159581927] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:00,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:43:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198432091] [2025-03-13 21:43:00,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:00,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:43:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:00,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:43:00,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:43:00,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:00,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 122 transitions, 1304 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:00,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:00,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:00,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:00,607 INFO L124 PetriNetUnfolderBase]: 352/641 cut-off events. [2025-03-13 21:43:00,607 INFO L125 PetriNetUnfolderBase]: For 4081/4081 co-relation queries the response was YES. [2025-03-13 21:43:00,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 641 events. 352/641 cut-off events. For 4081/4081 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2785 event pairs, 111 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 3718. Up to 527 conditions per place. [2025-03-13 21:43:00,611 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 110 selfloop transitions, 25 changer transitions 2/138 dead transitions. [2025-03-13 21:43:00,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 138 transitions, 1665 flow [2025-03-13 21:43:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:43:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:43:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2025-03-13 21:43:00,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3347107438016529 [2025-03-13 21:43:00,611 INFO L175 Difference]: Start difference. First operand has 150 places, 122 transitions, 1304 flow. Second operand 11 states and 81 transitions. [2025-03-13 21:43:00,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 138 transitions, 1665 flow [2025-03-13 21:43:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 138 transitions, 1605 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-03-13 21:43:00,623 INFO L231 Difference]: Finished difference. Result has 151 places, 120 transitions, 1273 flow [2025-03-13 21:43:00,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1273, PETRI_PLACES=151, PETRI_TRANSITIONS=120} [2025-03-13 21:43:00,623 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-03-13 21:43:00,623 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 120 transitions, 1273 flow [2025-03-13 21:43:00,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:00,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:00,623 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:00,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-03-13 21:43:00,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-03-13 21:43:00,824 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:00,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash 564582432, now seen corresponding path program 39 times [2025-03-13 21:43:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209534860] [2025-03-13 21:43:00,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:00,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:00,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:43:00,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:00,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:01,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209534860] [2025-03-13 21:43:01,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209534860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832349838] [2025-03-13 21:43:01,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:01,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:01,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:01,129 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:01,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-13 21:43:01,256 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:01,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:43:01,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:01,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:01,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:43:01,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:01,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:01,479 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:43:01,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:43:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832349838] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:01,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:43:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983053012] [2025-03-13 21:43:01,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:01,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:43:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:01,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:43:01,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:43:01,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:01,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 120 transitions, 1273 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:01,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:01,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:01,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:02,005 INFO L124 PetriNetUnfolderBase]: 350/639 cut-off events. [2025-03-13 21:43:02,006 INFO L125 PetriNetUnfolderBase]: For 3958/3958 co-relation queries the response was YES. [2025-03-13 21:43:02,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 639 events. 350/639 cut-off events. For 3958/3958 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2771 event pairs, 66 based on Foata normal form. 2/641 useless extension candidates. Maximal degree in co-relation 3695. Up to 349 conditions per place. [2025-03-13 21:43:02,009 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 83 selfloop transitions, 51 changer transitions 4/139 dead transitions. [2025-03-13 21:43:02,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 139 transitions, 1651 flow [2025-03-13 21:43:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:43:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:43:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2025-03-13 21:43:02,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2025-03-13 21:43:02,010 INFO L175 Difference]: Start difference. First operand has 151 places, 120 transitions, 1273 flow. Second operand 12 states and 87 transitions. [2025-03-13 21:43:02,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 139 transitions, 1651 flow [2025-03-13 21:43:02,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 139 transitions, 1561 flow, removed 20 selfloop flow, removed 10 redundant places. [2025-03-13 21:43:02,021 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 1275 flow [2025-03-13 21:43:02,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1275, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2025-03-13 21:43:02,022 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-03-13 21:43:02,022 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 1275 flow [2025-03-13 21:43:02,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:02,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:02,022 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:02,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-03-13 21:43:02,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-03-13 21:43:02,222 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:02,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -201268893, now seen corresponding path program 40 times [2025-03-13 21:43:02,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:02,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209191385] [2025-03-13 21:43:02,223 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:02,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:02,231 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:43:02,241 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:02,241 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:02,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:02,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209191385] [2025-03-13 21:43:02,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209191385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:02,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647974724] [2025-03-13 21:43:02,557 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:02,559 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-13 21:43:02,686 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:43:02,708 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:02,708 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:02,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:02,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:43:02,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:02,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:02,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:43:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:02,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:02,876 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:43:02,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:43:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647974724] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:02,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:43:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136681167] [2025-03-13 21:43:02,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:02,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:43:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:02,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:43:02,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:43:02,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:02,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 118 transitions, 1275 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:02,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:02,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:02,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:03,268 INFO L124 PetriNetUnfolderBase]: 354/643 cut-off events. [2025-03-13 21:43:03,268 INFO L125 PetriNetUnfolderBase]: For 3790/3790 co-relation queries the response was YES. [2025-03-13 21:43:03,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 643 events. 354/643 cut-off events. For 3790/3790 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2782 event pairs, 14 based on Foata normal form. 4/647 useless extension candidates. Maximal degree in co-relation 3716. Up to 278 conditions per place. [2025-03-13 21:43:03,272 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 91 selfloop transitions, 57 changer transitions 0/149 dead transitions. [2025-03-13 21:43:03,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 149 transitions, 1752 flow [2025-03-13 21:43:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:43:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:43:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2025-03-13 21:43:03,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3474025974025974 [2025-03-13 21:43:03,273 INFO L175 Difference]: Start difference. First operand has 151 places, 118 transitions, 1275 flow. Second operand 14 states and 107 transitions. [2025-03-13 21:43:03,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 149 transitions, 1752 flow [2025-03-13 21:43:03,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 149 transitions, 1648 flow, removed 1 selfloop flow, removed 10 redundant places. [2025-03-13 21:43:03,284 INFO L231 Difference]: Finished difference. Result has 152 places, 120 transitions, 1314 flow [2025-03-13 21:43:03,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1314, PETRI_PLACES=152, PETRI_TRANSITIONS=120} [2025-03-13 21:43:03,285 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2025-03-13 21:43:03,285 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 120 transitions, 1314 flow [2025-03-13 21:43:03,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:03,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:03,285 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:03,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-03-13 21:43:03,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:03,485 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:03,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -951304409, now seen corresponding path program 41 times [2025-03-13 21:43:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501690526] [2025-03-13 21:43:03,486 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:03,494 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:03,510 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:03,510 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:03,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-13 21:43:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501690526] [2025-03-13 21:43:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501690526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470272654] [2025-03-13 21:43:03,839 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:03,841 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:03,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-03-13 21:43:03,972 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:04,198 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:04,198 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:04,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:04,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-13 21:43:04,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:04,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-13 21:43:04,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-13 21:43:04,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-13 21:43:04,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:04,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-03-13 21:43:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:43:04,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470272654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:04,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:04,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 7] total 28 [2025-03-13 21:43:04,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149412765] [2025-03-13 21:43:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:04,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-13 21:43:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:04,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-13 21:43:04,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2025-03-13 21:43:04,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:04,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 120 transitions, 1314 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:04,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:04,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:04,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:05,190 INFO L124 PetriNetUnfolderBase]: 343/614 cut-off events. [2025-03-13 21:43:05,190 INFO L125 PetriNetUnfolderBase]: For 4383/4383 co-relation queries the response was YES. [2025-03-13 21:43:05,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3722 conditions, 614 events. 343/614 cut-off events. For 4383/4383 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2645 event pairs, 72 based on Foata normal form. 3/617 useless extension candidates. Maximal degree in co-relation 3625. Up to 390 conditions per place. [2025-03-13 21:43:05,198 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 110 selfloop transitions, 39 changer transitions 3/153 dead transitions. [2025-03-13 21:43:05,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 153 transitions, 1891 flow [2025-03-13 21:43:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-13 21:43:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-13 21:43:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 104 transitions. [2025-03-13 21:43:05,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2025-03-13 21:43:05,199 INFO L175 Difference]: Start difference. First operand has 152 places, 120 transitions, 1314 flow. Second operand 16 states and 104 transitions. [2025-03-13 21:43:05,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 153 transitions, 1891 flow [2025-03-13 21:43:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 153 transitions, 1758 flow, removed 6 selfloop flow, removed 12 redundant places. [2025-03-13 21:43:05,212 INFO L231 Difference]: Finished difference. Result has 155 places, 121 transitions, 1273 flow [2025-03-13 21:43:05,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1273, PETRI_PLACES=155, PETRI_TRANSITIONS=121} [2025-03-13 21:43:05,212 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2025-03-13 21:43:05,212 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 121 transitions, 1273 flow [2025-03-13 21:43:05,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:05,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:05,213 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:05,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-03-13 21:43:05,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-03-13 21:43:05,413 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:05,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1300898027, now seen corresponding path program 42 times [2025-03-13 21:43:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:05,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433824371] [2025-03-13 21:43:05,414 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:05,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:05,421 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:05,428 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:43:05,428 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:43:05,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:05,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433824371] [2025-03-13 21:43:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433824371] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353814519] [2025-03-13 21:43:05,699 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:05,701 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:05,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-13 21:43:05,839 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:05,858 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-03-13 21:43:05,858 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:43:05,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:05,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:43:05,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:05,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:06,061 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:43:06,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:43:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353814519] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:06,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:43:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851080786] [2025-03-13 21:43:06,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:06,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:43:06,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:06,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:43:06,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:43:06,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 121 transitions, 1273 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:06,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:06,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:06,498 INFO L124 PetriNetUnfolderBase]: 366/650 cut-off events. [2025-03-13 21:43:06,498 INFO L125 PetriNetUnfolderBase]: For 3809/3809 co-relation queries the response was YES. [2025-03-13 21:43:06,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3899 conditions, 650 events. 366/650 cut-off events. For 3809/3809 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2783 event pairs, 19 based on Foata normal form. 4/654 useless extension candidates. Maximal degree in co-relation 3794. Up to 290 conditions per place. [2025-03-13 21:43:06,502 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 98 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2025-03-13 21:43:06,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 153 transitions, 1827 flow [2025-03-13 21:43:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:43:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:43:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2025-03-13 21:43:06,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2025-03-13 21:43:06,503 INFO L175 Difference]: Start difference. First operand has 155 places, 121 transitions, 1273 flow. Second operand 13 states and 98 transitions. [2025-03-13 21:43:06,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 153 transitions, 1827 flow [2025-03-13 21:43:06,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 153 transitions, 1769 flow, removed 3 selfloop flow, removed 12 redundant places. [2025-03-13 21:43:06,515 INFO L231 Difference]: Finished difference. Result has 156 places, 126 transitions, 1403 flow [2025-03-13 21:43:06,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1403, PETRI_PLACES=156, PETRI_TRANSITIONS=126} [2025-03-13 21:43:06,515 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2025-03-13 21:43:06,515 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 126 transitions, 1403 flow [2025-03-13 21:43:06,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:06,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:06,516 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:06,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:06,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:06,717 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:06,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1146030876, now seen corresponding path program 43 times [2025-03-13 21:43:06,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:06,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058843897] [2025-03-13 21:43:06,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:43:06,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:06,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:43:06,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:06,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:06,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:07,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:07,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058843897] [2025-03-13 21:43:07,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058843897] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:07,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348965338] [2025-03-13 21:43:07,141 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:43:07,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:07,143 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:07,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-03-13 21:43:07,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:43:07,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:07,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:07,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:07,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:43:07,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:07,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:07,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-03-13 21:43:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:07,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:07,518 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:43:07,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:43:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348965338] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:07,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-03-13 21:43:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714146841] [2025-03-13 21:43:07,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:07,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:43:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:07,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:43:07,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:43:07,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:07,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 126 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:07,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:07,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:07,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:07,872 INFO L124 PetriNetUnfolderBase]: 364/648 cut-off events. [2025-03-13 21:43:07,872 INFO L125 PetriNetUnfolderBase]: For 4550/4550 co-relation queries the response was YES. [2025-03-13 21:43:07,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4084 conditions, 648 events. 364/648 cut-off events. For 4550/4550 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2798 event pairs, 75 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3989. Up to 372 conditions per place. [2025-03-13 21:43:07,876 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 91 selfloop transitions, 48 changer transitions 2/142 dead transitions. [2025-03-13 21:43:07,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 142 transitions, 1766 flow [2025-03-13 21:43:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:43:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:43:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2025-03-13 21:43:07,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2025-03-13 21:43:07,877 INFO L175 Difference]: Start difference. First operand has 156 places, 126 transitions, 1403 flow. Second operand 10 states and 77 transitions. [2025-03-13 21:43:07,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 142 transitions, 1766 flow [2025-03-13 21:43:07,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 142 transitions, 1654 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-03-13 21:43:07,889 INFO L231 Difference]: Finished difference. Result has 156 places, 124 transitions, 1368 flow [2025-03-13 21:43:07,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1368, PETRI_PLACES=156, PETRI_TRANSITIONS=124} [2025-03-13 21:43:07,889 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2025-03-13 21:43:07,889 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 124 transitions, 1368 flow [2025-03-13 21:43:07,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:07,889 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:07,890 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:07,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-03-13 21:43:08,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2025-03-13 21:43:08,090 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:08,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash -751574872, now seen corresponding path program 44 times [2025-03-13 21:43:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124106526] [2025-03-13 21:43:08,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:08,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:43:08,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:08,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:08,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124106526] [2025-03-13 21:43:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124106526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222782063] [2025-03-13 21:43:08,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:08,478 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:08,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-13 21:43:08,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:43:08,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:43:08,643 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:08,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:08,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:43:08,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:08,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:08,822 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-03-13 21:43:08,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-03-13 21:43:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:08,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222782063] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:08,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:08,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:43:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470026546] [2025-03-13 21:43:08,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:08,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:43:08,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:08,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:43:08,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:43:08,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:08,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 124 transitions, 1368 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:08,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:08,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:08,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:09,148 INFO L124 PetriNetUnfolderBase]: 359/633 cut-off events. [2025-03-13 21:43:09,148 INFO L125 PetriNetUnfolderBase]: For 4415/4415 co-relation queries the response was YES. [2025-03-13 21:43:09,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3996 conditions, 633 events. 359/633 cut-off events. For 4415/4415 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2701 event pairs, 75 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3902. Up to 372 conditions per place. [2025-03-13 21:43:09,151 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 85 selfloop transitions, 42 changer transitions 6/134 dead transitions. [2025-03-13 21:43:09,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 134 transitions, 1681 flow [2025-03-13 21:43:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:43:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:43:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 64 transitions. [2025-03-13 21:43:09,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32323232323232326 [2025-03-13 21:43:09,152 INFO L175 Difference]: Start difference. First operand has 156 places, 124 transitions, 1368 flow. Second operand 9 states and 64 transitions. [2025-03-13 21:43:09,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 134 transitions, 1681 flow [2025-03-13 21:43:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 134 transitions, 1585 flow, removed 1 selfloop flow, removed 9 redundant places. [2025-03-13 21:43:09,174 INFO L231 Difference]: Finished difference. Result has 153 places, 120 transitions, 1278 flow [2025-03-13 21:43:09,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1278, PETRI_PLACES=153, PETRI_TRANSITIONS=120} [2025-03-13 21:43:09,174 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2025-03-13 21:43:09,174 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 120 transitions, 1278 flow [2025-03-13 21:43:09,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:09,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:09,174 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:09,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:09,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:09,375 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:09,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 126853259, now seen corresponding path program 45 times [2025-03-13 21:43:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:09,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251563636] [2025-03-13 21:43:09,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:09,383 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:09,389 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:43:09,389 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:09,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251563636] [2025-03-13 21:43:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251563636] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783862099] [2025-03-13 21:43:09,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:09,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:09,645 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-13 21:43:09,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-13 21:43:09,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-03-13 21:43:09,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:09,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:09,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:43:09,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:09,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:09,994 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:43:09,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:43:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783862099] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:10,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:10,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-13 21:43:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985301926] [2025-03-13 21:43:10,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:10,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:43:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:10,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:43:10,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:43:10,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:10,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 120 transitions, 1278 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:10,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:10,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:10,318 INFO L124 PetriNetUnfolderBase]: 369/640 cut-off events. [2025-03-13 21:43:10,318 INFO L125 PetriNetUnfolderBase]: For 4017/4017 co-relation queries the response was YES. [2025-03-13 21:43:10,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 640 events. 369/640 cut-off events. For 4017/4017 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2693 event pairs, 16 based on Foata normal form. 4/644 useless extension candidates. Maximal degree in co-relation 3926. Up to 303 conditions per place. [2025-03-13 21:43:10,322 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 50 changer transitions 0/141 dead transitions. [2025-03-13 21:43:10,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 141 transitions, 1723 flow [2025-03-13 21:43:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:43:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:43:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 75 transitions. [2025-03-13 21:43:10,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2025-03-13 21:43:10,322 INFO L175 Difference]: Start difference. First operand has 153 places, 120 transitions, 1278 flow. Second operand 10 states and 75 transitions. [2025-03-13 21:43:10,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 141 transitions, 1723 flow [2025-03-13 21:43:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 141 transitions, 1553 flow, removed 4 selfloop flow, removed 10 redundant places. [2025-03-13 21:43:10,333 INFO L231 Difference]: Finished difference. Result has 144 places, 122 transitions, 1243 flow [2025-03-13 21:43:10,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1243, PETRI_PLACES=144, PETRI_TRANSITIONS=122} [2025-03-13 21:43:10,333 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2025-03-13 21:43:10,333 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 122 transitions, 1243 flow [2025-03-13 21:43:10,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:10,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:10,333 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:10,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-03-13 21:43:10,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:10,534 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:10,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1749835468, now seen corresponding path program 46 times [2025-03-13 21:43:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:10,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603778067] [2025-03-13 21:43:10,535 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:10,543 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:10,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:10,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:10,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:43:11,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:11,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603778067] [2025-03-13 21:43:11,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603778067] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:11,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309986635] [2025-03-13 21:43:11,056 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:11,058 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:11,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-13 21:43:11,200 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:11,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:11,224 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:11,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:11,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:11,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:11,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:11,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:11,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:11,631 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-03-13 21:43:11,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2025-03-13 21:43:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309986635] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:11,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2025-03-13 21:43:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106270818] [2025-03-13 21:43:11,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:11,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:43:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:11,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:43:11,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:43:11,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:11,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 122 transitions, 1243 flow. Second operand has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:11,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:11,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:12,397 INFO L124 PetriNetUnfolderBase]: 506/880 cut-off events. [2025-03-13 21:43:12,397 INFO L125 PetriNetUnfolderBase]: For 4593/4593 co-relation queries the response was YES. [2025-03-13 21:43:12,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5362 conditions, 880 events. 506/880 cut-off events. For 4593/4593 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4104 event pairs, 34 based on Foata normal form. 1/881 useless extension candidates. Maximal degree in co-relation 5270. Up to 342 conditions per place. [2025-03-13 21:43:12,403 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 104 selfloop transitions, 72 changer transitions 3/180 dead transitions. [2025-03-13 21:43:12,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 180 transitions, 2069 flow [2025-03-13 21:43:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-13 21:43:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-13 21:43:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 141 transitions. [2025-03-13 21:43:12,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32045454545454544 [2025-03-13 21:43:12,403 INFO L175 Difference]: Start difference. First operand has 144 places, 122 transitions, 1243 flow. Second operand 20 states and 141 transitions. [2025-03-13 21:43:12,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 180 transitions, 2069 flow [2025-03-13 21:43:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 180 transitions, 1945 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-13 21:43:12,417 INFO L231 Difference]: Finished difference. Result has 160 places, 134 transitions, 1489 flow [2025-03-13 21:43:12,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1489, PETRI_PLACES=160, PETRI_TRANSITIONS=134} [2025-03-13 21:43:12,417 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2025-03-13 21:43:12,417 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 134 transitions, 1489 flow [2025-03-13 21:43:12,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:12,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:12,418 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:12,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:12,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2025-03-13 21:43:12,618 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:12,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash -531234722, now seen corresponding path program 47 times [2025-03-13 21:43:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668589272] [2025-03-13 21:43:12,619 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:12,627 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:12,647 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:12,647 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:12,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-13 21:43:13,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668589272] [2025-03-13 21:43:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668589272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085704542] [2025-03-13 21:43:13,021 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:13,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:13,023 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:13,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-13 21:43:13,168 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:13,305 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:13,305 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:13,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:13,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-13 21:43:13,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:13,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-13 21:43:13,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:13,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2025-03-13 21:43:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-13 21:43:13,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085704542] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:14,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 34 [2025-03-13 21:43:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956831153] [2025-03-13 21:43:14,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:14,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-13 21:43:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:14,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-13 21:43:14,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2025-03-13 21:43:14,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:14,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 134 transitions, 1489 flow. Second operand has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:14,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:14,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:14,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:15,280 INFO L124 PetriNetUnfolderBase]: 568/994 cut-off events. [2025-03-13 21:43:15,280 INFO L125 PetriNetUnfolderBase]: For 6070/6070 co-relation queries the response was YES. [2025-03-13 21:43:15,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6243 conditions, 994 events. 568/994 cut-off events. For 6070/6070 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4728 event pairs, 52 based on Foata normal form. 2/996 useless extension candidates. Maximal degree in co-relation 6136. Up to 654 conditions per place. [2025-03-13 21:43:15,285 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 112 selfloop transitions, 75 changer transitions 2/190 dead transitions. [2025-03-13 21:43:15,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 190 transitions, 2288 flow [2025-03-13 21:43:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-13 21:43:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-13 21:43:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 163 transitions. [2025-03-13 21:43:15,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3367768595041322 [2025-03-13 21:43:15,286 INFO L175 Difference]: Start difference. First operand has 160 places, 134 transitions, 1489 flow. Second operand 22 states and 163 transitions. [2025-03-13 21:43:15,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 190 transitions, 2288 flow [2025-03-13 21:43:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 190 transitions, 2100 flow, removed 31 selfloop flow, removed 14 redundant places. [2025-03-13 21:43:15,303 INFO L231 Difference]: Finished difference. Result has 170 places, 150 transitions, 1724 flow [2025-03-13 21:43:15,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1724, PETRI_PLACES=170, PETRI_TRANSITIONS=150} [2025-03-13 21:43:15,303 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-03-13 21:43:15,303 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 150 transitions, 1724 flow [2025-03-13 21:43:15,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:15,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:15,303 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:15,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-03-13 21:43:15,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-03-13 21:43:15,508 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:15,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2045983514, now seen corresponding path program 48 times [2025-03-13 21:43:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:15,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807108774] [2025-03-13 21:43:15,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:15,516 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:15,532 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:15,532 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-13 21:43:15,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807108774] [2025-03-13 21:43:15,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807108774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493625592] [2025-03-13 21:43:15,852 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:15,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:15,854 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:15,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-13 21:43:16,003 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:16,035 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:16,035 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-13 21:43:16,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:16,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-13 21:43:16,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:16,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:16,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-13 21:43:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:16,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:16,436 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:43:16,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:43:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493625592] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:16,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 31 [2025-03-13 21:43:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702641168] [2025-03-13 21:43:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:16,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-13 21:43:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:16,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-13 21:43:16,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2025-03-13 21:43:16,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:16,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 150 transitions, 1724 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:16,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:16,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:16,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:17,257 INFO L124 PetriNetUnfolderBase]: 632/1116 cut-off events. [2025-03-13 21:43:17,258 INFO L125 PetriNetUnfolderBase]: For 7674/7674 co-relation queries the response was YES. [2025-03-13 21:43:17,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7177 conditions, 1116 events. 632/1116 cut-off events. For 7674/7674 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5486 event pairs, 58 based on Foata normal form. 3/1119 useless extension candidates. Maximal degree in co-relation 7077. Up to 661 conditions per place. [2025-03-13 21:43:17,265 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 117 selfloop transitions, 86 changer transitions 5/209 dead transitions. [2025-03-13 21:43:17,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 209 transitions, 2591 flow [2025-03-13 21:43:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-13 21:43:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-13 21:43:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2025-03-13 21:43:17,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3528138528138528 [2025-03-13 21:43:17,265 INFO L175 Difference]: Start difference. First operand has 170 places, 150 transitions, 1724 flow. Second operand 21 states and 163 transitions. [2025-03-13 21:43:17,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 209 transitions, 2591 flow [2025-03-13 21:43:17,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 209 transitions, 2383 flow, removed 79 selfloop flow, removed 13 redundant places. [2025-03-13 21:43:17,290 INFO L231 Difference]: Finished difference. Result has 182 places, 164 transitions, 1947 flow [2025-03-13 21:43:17,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1947, PETRI_PLACES=182, PETRI_TRANSITIONS=164} [2025-03-13 21:43:17,290 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2025-03-13 21:43:17,290 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 164 transitions, 1947 flow [2025-03-13 21:43:17,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:17,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:17,290 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:17,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-03-13 21:43:17,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-03-13 21:43:17,491 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:17,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -931461086, now seen corresponding path program 49 times [2025-03-13 21:43:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:17,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15903037] [2025-03-13 21:43:17,492 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:43:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:17,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:43:17,510 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:17,510 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:17,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:43:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15903037] [2025-03-13 21:43:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15903037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568847900] [2025-03-13 21:43:18,006 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:43:18,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:18,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:18,008 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:18,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-03-13 21:43:18,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:43:18,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:18,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:18,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:18,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:18,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:18,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:18,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:18,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:18,575 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-13 21:43:18,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-03-13 21:43:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568847900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:18,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2025-03-13 21:43:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657801469] [2025-03-13 21:43:18,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:18,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:43:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:18,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:43:18,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:43:18,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:18,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 164 transitions, 1947 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:18,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:18,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:18,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:19,361 INFO L124 PetriNetUnfolderBase]: 648/1146 cut-off events. [2025-03-13 21:43:19,361 INFO L125 PetriNetUnfolderBase]: For 7558/7558 co-relation queries the response was YES. [2025-03-13 21:43:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7431 conditions, 1146 events. 648/1146 cut-off events. For 7558/7558 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5688 event pairs, 80 based on Foata normal form. 1/1147 useless extension candidates. Maximal degree in co-relation 7330. Up to 847 conditions per place. [2025-03-13 21:43:19,369 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 119 selfloop transitions, 76 changer transitions 2/198 dead transitions. [2025-03-13 21:43:19,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 198 transitions, 2589 flow [2025-03-13 21:43:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-13 21:43:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-13 21:43:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 139 transitions. [2025-03-13 21:43:19,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3008658008658009 [2025-03-13 21:43:19,369 INFO L175 Difference]: Start difference. First operand has 182 places, 164 transitions, 1947 flow. Second operand 21 states and 139 transitions. [2025-03-13 21:43:19,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 198 transitions, 2589 flow [2025-03-13 21:43:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 198 transitions, 2409 flow, removed 37 selfloop flow, removed 13 redundant places. [2025-03-13 21:43:19,390 INFO L231 Difference]: Finished difference. Result has 190 places, 175 transitions, 2077 flow [2025-03-13 21:43:19,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2077, PETRI_PLACES=190, PETRI_TRANSITIONS=175} [2025-03-13 21:43:19,391 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2025-03-13 21:43:19,391 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 175 transitions, 2077 flow [2025-03-13 21:43:19,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:19,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:19,391 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:19,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:19,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2025-03-13 21:43:19,592 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:19,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 428905728, now seen corresponding path program 50 times [2025-03-13 21:43:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:19,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572681172] [2025-03-13 21:43:19,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:19,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:19,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:19,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:19,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:43:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572681172] [2025-03-13 21:43:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572681172] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481249] [2025-03-13 21:43:20,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:20,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:20,103 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:20,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-03-13 21:43:20,253 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:20,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:20,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:20,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:20,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:20,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:20,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:20,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:20,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:20,666 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:43:20,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:43:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:20,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2025-03-13 21:43:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962624559] [2025-03-13 21:43:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:20,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:43:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:20,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:43:20,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:43:20,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:20,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 175 transitions, 2077 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:20,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:21,702 INFO L124 PetriNetUnfolderBase]: 712/1268 cut-off events. [2025-03-13 21:43:21,702 INFO L125 PetriNetUnfolderBase]: For 8153/8153 co-relation queries the response was YES. [2025-03-13 21:43:21,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 1268 events. 712/1268 cut-off events. For 8153/8153 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6432 event pairs, 70 based on Foata normal form. 6/1274 useless extension candidates. Maximal degree in co-relation 8080. Up to 845 conditions per place. [2025-03-13 21:43:21,709 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 140 selfloop transitions, 91 changer transitions 5/237 dead transitions. [2025-03-13 21:43:21,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 237 transitions, 3012 flow [2025-03-13 21:43:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:43:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:43:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 197 transitions. [2025-03-13 21:43:21,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33164983164983164 [2025-03-13 21:43:21,710 INFO L175 Difference]: Start difference. First operand has 190 places, 175 transitions, 2077 flow. Second operand 27 states and 197 transitions. [2025-03-13 21:43:21,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 237 transitions, 3012 flow [2025-03-13 21:43:21,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 237 transitions, 2801 flow, removed 38 selfloop flow, removed 14 redundant places. [2025-03-13 21:43:21,734 INFO L231 Difference]: Finished difference. Result has 207 places, 189 transitions, 2284 flow [2025-03-13 21:43:21,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2284, PETRI_PLACES=207, PETRI_TRANSITIONS=189} [2025-03-13 21:43:21,735 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 185 predicate places. [2025-03-13 21:43:21,735 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 189 transitions, 2284 flow [2025-03-13 21:43:21,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:21,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:21,735 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:21,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-03-13 21:43:21,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-03-13 21:43:21,935 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:21,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1805201766, now seen corresponding path program 51 times [2025-03-13 21:43:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79581476] [2025-03-13 21:43:21,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:21,944 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:21,951 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-03-13 21:43:21,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:21,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79581476] [2025-03-13 21:43:22,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79581476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792343949] [2025-03-13 21:43:22,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:22,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:22,249 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:22,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-03-13 21:43:22,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:22,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-03-13 21:43:22,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:43:22,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:22,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:22,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:22,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:22,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:22,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:22,821 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-13 21:43:22,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2025-03-13 21:43:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:22,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792343949] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:22,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:22,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2025-03-13 21:43:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676306572] [2025-03-13 21:43:22,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:22,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-13 21:43:22,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:22,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-13 21:43:22,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:43:22,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:22,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 189 transitions, 2284 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:22,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:22,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:22,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:23,451 INFO L124 PetriNetUnfolderBase]: 716/1279 cut-off events. [2025-03-13 21:43:23,451 INFO L125 PetriNetUnfolderBase]: For 9165/9165 co-relation queries the response was YES. [2025-03-13 21:43:23,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 1279 events. 716/1279 cut-off events. For 9165/9165 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6556 event pairs, 95 based on Foata normal form. 1/1280 useless extension candidates. Maximal degree in co-relation 8400. Up to 965 conditions per place. [2025-03-13 21:43:23,460 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 145 selfloop transitions, 67 changer transitions 3/216 dead transitions. [2025-03-13 21:43:23,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 216 transitions, 2855 flow [2025-03-13 21:43:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:43:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:43:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 113 transitions. [2025-03-13 21:43:23,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2025-03-13 21:43:23,461 INFO L175 Difference]: Start difference. First operand has 207 places, 189 transitions, 2284 flow. Second operand 15 states and 113 transitions. [2025-03-13 21:43:23,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 216 transitions, 2855 flow [2025-03-13 21:43:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 216 transitions, 2648 flow, removed 43 selfloop flow, removed 19 redundant places. [2025-03-13 21:43:23,491 INFO L231 Difference]: Finished difference. Result has 204 places, 191 transitions, 2251 flow [2025-03-13 21:43:23,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2251, PETRI_PLACES=204, PETRI_TRANSITIONS=191} [2025-03-13 21:43:23,491 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 182 predicate places. [2025-03-13 21:43:23,491 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 191 transitions, 2251 flow [2025-03-13 21:43:23,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:23,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:23,492 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:23,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-03-13 21:43:23,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-03-13 21:43:23,692 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:23,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1457806464, now seen corresponding path program 52 times [2025-03-13 21:43:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137796737] [2025-03-13 21:43:23,693 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:23,704 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:23,717 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:23,717 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:23,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:43:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137796737] [2025-03-13 21:43:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137796737] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479069231] [2025-03-13 21:43:24,262 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:24,264 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:24,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-03-13 21:43:24,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-13 21:43:24,444 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:24,444 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:24,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:24,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:24,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:24,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:24,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:24,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:24,810 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-13 21:43:24,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-03-13 21:43:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:24,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479069231] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:24,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:24,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 31 [2025-03-13 21:43:24,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796461882] [2025-03-13 21:43:24,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:24,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-13 21:43:24,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:24,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-13 21:43:24,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2025-03-13 21:43:24,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:24,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 191 transitions, 2251 flow. Second operand has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:24,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:24,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:24,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:25,622 INFO L124 PetriNetUnfolderBase]: 720/1290 cut-off events. [2025-03-13 21:43:25,623 INFO L125 PetriNetUnfolderBase]: For 9261/9261 co-relation queries the response was YES. [2025-03-13 21:43:25,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 1290 events. 720/1290 cut-off events. For 9261/9261 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6659 event pairs, 103 based on Foata normal form. 1/1291 useless extension candidates. Maximal degree in co-relation 8443. Up to 964 conditions per place. [2025-03-13 21:43:25,632 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 132 selfloop transitions, 77 changer transitions 1/211 dead transitions. [2025-03-13 21:43:25,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 211 transitions, 2771 flow [2025-03-13 21:43:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-13 21:43:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-13 21:43:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 126 transitions. [2025-03-13 21:43:25,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3014354066985646 [2025-03-13 21:43:25,633 INFO L175 Difference]: Start difference. First operand has 204 places, 191 transitions, 2251 flow. Second operand 19 states and 126 transitions. [2025-03-13 21:43:25,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 211 transitions, 2771 flow [2025-03-13 21:43:25,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 211 transitions, 2627 flow, removed 7 selfloop flow, removed 12 redundant places. [2025-03-13 21:43:25,664 INFO L231 Difference]: Finished difference. Result has 211 places, 192 transitions, 2289 flow [2025-03-13 21:43:25,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2289, PETRI_PLACES=211, PETRI_TRANSITIONS=192} [2025-03-13 21:43:25,665 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 189 predicate places. [2025-03-13 21:43:25,665 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 192 transitions, 2289 flow [2025-03-13 21:43:25,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:25,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:25,665 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:25,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-03-13 21:43:25,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:25,866 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:25,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash -894326484, now seen corresponding path program 53 times [2025-03-13 21:43:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:25,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608862112] [2025-03-13 21:43:25,866 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:25,874 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:25,894 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:25,894 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:25,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:26,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:26,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608862112] [2025-03-13 21:43:26,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608862112] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:26,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112777652] [2025-03-13 21:43:26,673 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:26,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:26,675 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:26,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-03-13 21:43:26,828 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:26,873 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:43:26,873 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-13 21:43:26,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:26,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-13 21:43:26,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:27,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:27,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-13 21:43:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:27,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:27,371 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-03-13 21:43:27,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-03-13 21:43:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112777652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:27,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 41 [2025-03-13 21:43:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628007698] [2025-03-13 21:43:27,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:27,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-13 21:43:27,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:27,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-13 21:43:27,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2025-03-13 21:43:27,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:27,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 192 transitions, 2289 flow. Second operand has 41 states, 41 states have (on average 4.609756097560975) internal successors, (189), 41 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:27,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:27,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:27,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:28,326 INFO L124 PetriNetUnfolderBase]: 771/1384 cut-off events. [2025-03-13 21:43:28,326 INFO L125 PetriNetUnfolderBase]: For 10769/10769 co-relation queries the response was YES. [2025-03-13 21:43:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 1384 events. 771/1384 cut-off events. For 10769/10769 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7285 event pairs, 100 based on Foata normal form. 2/1386 useless extension candidates. Maximal degree in co-relation 9100. Up to 1192 conditions per place. [2025-03-13 21:43:28,335 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 183 selfloop transitions, 55 changer transitions 2/241 dead transitions. [2025-03-13 21:43:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 241 transitions, 3189 flow [2025-03-13 21:43:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-13 21:43:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-13 21:43:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 153 transitions. [2025-03-13 21:43:28,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2025-03-13 21:43:28,336 INFO L175 Difference]: Start difference. First operand has 211 places, 192 transitions, 2289 flow. Second operand 21 states and 153 transitions. [2025-03-13 21:43:28,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 241 transitions, 3189 flow [2025-03-13 21:43:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 241 transitions, 3021 flow, removed 10 selfloop flow, removed 18 redundant places. [2025-03-13 21:43:28,368 INFO L231 Difference]: Finished difference. Result has 218 places, 210 transitions, 2552 flow [2025-03-13 21:43:28,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2552, PETRI_PLACES=218, PETRI_TRANSITIONS=210} [2025-03-13 21:43:28,368 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 196 predicate places. [2025-03-13 21:43:28,368 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 210 transitions, 2552 flow [2025-03-13 21:43:28,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.609756097560975) internal successors, (189), 41 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:28,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:28,368 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:28,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-03-13 21:43:28,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:28,569 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:28,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 72602432, now seen corresponding path program 54 times [2025-03-13 21:43:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270168126] [2025-03-13 21:43:28,569 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:28,577 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:28,586 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-03-13 21:43:28,586 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:43:28,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:43:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270168126] [2025-03-13 21:43:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270168126] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602066773] [2025-03-13 21:43:28,867 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:28,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:28,869 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:28,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-03-13 21:43:29,032 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-03-13 21:43:29,053 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-03-13 21:43:29,053 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:43:29,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:29,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:43:29,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:29,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:43:29,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-03-13 21:43:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:29,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:29,411 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-13 21:43:29,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-03-13 21:43:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-13 21:43:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602066773] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:29,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2025-03-13 21:43:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042682064] [2025-03-13 21:43:29,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:29,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-13 21:43:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:29,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-13 21:43:29,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2025-03-13 21:43:29,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-03-13 21:43:29,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 210 transitions, 2552 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:29,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:29,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-03-13 21:43:29,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand