./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:36:44,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:36:44,482 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:36:44,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:36:44,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:36:44,500 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:36:44,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:36:44,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:36:44,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:36:44,501 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:36:44,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:36:44,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:36:44,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:36:44,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:36:44,502 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:36:44,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:36:44,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:36:44,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:36:44,503 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 -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2025-03-08 17:36:44,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:36:44,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:36:44,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:36:44,744 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:36:44,744 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:36:44,745 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-03-08 17:36:45,839 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f6235ab/c7d99d7985a348c782976a6dd0b2d6c2/FLAG9453c71c8 [2025-03-08 17:36:46,079 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:36:46,080 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-03-08 17:36:46,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f6235ab/c7d99d7985a348c782976a6dd0b2d6c2/FLAG9453c71c8 [2025-03-08 17:36:46,401 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f6235ab/c7d99d7985a348c782976a6dd0b2d6c2 [2025-03-08 17:36:46,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:36:46,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:36:46,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:36:46,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:36:46,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:36:46,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0b2988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46, skipping insertion in model container [2025-03-08 17:36:46,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,424 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:36:46,546 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/popl20-more-sorted.wvr.c[2473,2486] [2025-03-08 17:36:46,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:36:46,568 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:36:46,587 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/popl20-more-sorted.wvr.c[2473,2486] [2025-03-08 17:36:46,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:36:46,606 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:36:46,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46 WrapperNode [2025-03-08 17:36:46,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:36:46,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:36:46,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:36:46,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:36:46,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,637 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2025-03-08 17:36:46,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:36:46,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:36:46,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:36:46,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:36:46,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,648 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,659 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 17:36:46,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,666 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,668 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:36:46,670 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:36:46,670 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:36:46,670 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:36:46,671 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (1/1) ... [2025-03-08 17:36:46,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:36:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:46,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:36:46,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:36:46,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:36:46,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:36:46,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:36:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:36:46,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:36:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:36:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:36:46,724 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:36:46,810 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:36:46,812 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:36:47,038 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:36:47,038 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:36:47,195 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:36:47,196 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:36:47,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:36:47 BoogieIcfgContainer [2025-03-08 17:36:47,197 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:36:47,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:36:47,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:36:47,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:36:47,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:36:46" (1/3) ... [2025-03-08 17:36:47,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11eb4a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:36:47, skipping insertion in model container [2025-03-08 17:36:47,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:46" (2/3) ... [2025-03-08 17:36:47,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11eb4a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:36:47, skipping insertion in model container [2025-03-08 17:36:47,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:36:47" (3/3) ... [2025-03-08 17:36:47,206 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2025-03-08 17:36:47,217 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:36:47,220 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sorted.wvr.c that has 4 procedures, 24 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 17:36:47,220 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:36:47,272 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-08 17:36:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2025-03-08 17:36:47,323 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2025-03-08 17:36:47,328 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:36:47,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-03-08 17:36:47,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2025-03-08 17:36:47,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2025-03-08 17:36:47,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:36:47,367 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;@7e4e2ed8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:36:47,367 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:36:47,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:36:47,381 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2025-03-08 17:36:47,381 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:36:47,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:47,382 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:47,382 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:47,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1375377675, now seen corresponding path program 1 times [2025-03-08 17:36:47,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:47,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741773260] [2025-03-08 17:36:47,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:47,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:47,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:36:47,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:36:47,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:47,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741773260] [2025-03-08 17:36:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741773260] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:47,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:36:47,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:36:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685413009] [2025-03-08 17:36:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:47,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:36:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:47,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:36:47,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:36:47,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:47,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:47,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:47,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:47,874 INFO L124 PetriNetUnfolderBase]: 200/296 cut-off events. [2025-03-08 17:36:47,875 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-08 17:36:47,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 296 events. 200/296 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 685 event pairs, 124 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 534. Up to 295 conditions per place. [2025-03-08 17:36:47,880 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2025-03-08 17:36:47,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 112 flow [2025-03-08 17:36:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:36:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:36:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2025-03-08 17:36:47,892 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-03-08 17:36:47,893 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 36 transitions. [2025-03-08 17:36:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 112 flow [2025-03-08 17:36:47,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-08 17:36:47,899 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 64 flow [2025-03-08 17:36:47,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2025-03-08 17:36:47,904 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2025-03-08 17:36:47,905 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 64 flow [2025-03-08 17:36:47,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:47,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:47,905 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:47,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:36:47,906 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:47,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1348069956, now seen corresponding path program 1 times [2025-03-08 17:36:47,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:47,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740666492] [2025-03-08 17:36:47,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:47,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 17:36:47,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:36:47,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:47,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740666492] [2025-03-08 17:36:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740666492] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:36:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:36:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911063299] [2025-03-08 17:36:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:48,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:36:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:48,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:36:48,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:36:48,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:48,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:48,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:48,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:48,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:48,297 INFO L124 PetriNetUnfolderBase]: 387/568 cut-off events. [2025-03-08 17:36:48,297 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-08 17:36:48,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 568 events. 387/568 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1767 event pairs, 124 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1156. Up to 352 conditions per place. [2025-03-08 17:36:48,302 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 35 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2025-03-08 17:36:48,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 183 flow [2025-03-08 17:36:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:36:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:36:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2025-03-08 17:36:48,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2025-03-08 17:36:48,305 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 64 flow. Second operand 3 states and 52 transitions. [2025-03-08 17:36:48,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 183 flow [2025-03-08 17:36:48,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 179 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:36:48,306 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 86 flow [2025-03-08 17:36:48,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2025-03-08 17:36:48,307 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2025-03-08 17:36:48,307 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 86 flow [2025-03-08 17:36:48,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:48,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:48,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:48,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:36:48,307 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:48,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash 438726264, now seen corresponding path program 1 times [2025-03-08 17:36:48,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:48,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533065036] [2025-03-08 17:36:48,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:48,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:48,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:48,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:48,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:48,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:48,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533065036] [2025-03-08 17:36:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533065036] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118173104] [2025-03-08 17:36:48,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:48,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:48,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:48,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:48,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:36:48,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:48,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:48,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:48,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:48,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:36:48,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:48,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118173104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:48,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:48,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 17:36:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779062461] [2025-03-08 17:36:48,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:48,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:36:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:48,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:36:48,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:36:48,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:48,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 86 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:48,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:48,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:48,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:48,968 INFO L124 PetriNetUnfolderBase]: 721/1078 cut-off events. [2025-03-08 17:36:48,968 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2025-03-08 17:36:48,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 1078 events. 721/1078 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3942 event pairs, 417 based on Foata normal form. 42/1120 useless extension candidates. Maximal degree in co-relation 1376. Up to 567 conditions per place. [2025-03-08 17:36:48,973 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 53 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2025-03-08 17:36:48,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 60 transitions, 307 flow [2025-03-08 17:36:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2025-03-08 17:36:48,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2025-03-08 17:36:48,976 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 86 flow. Second operand 6 states and 77 transitions. [2025-03-08 17:36:48,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 60 transitions, 307 flow [2025-03-08 17:36:48,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 60 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:36:48,978 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 128 flow [2025-03-08 17:36:48,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2025-03-08 17:36:48,978 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2025-03-08 17:36:48,979 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 128 flow [2025-03-08 17:36:48,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:48,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:48,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:48,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:36:49,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:49,180 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:49,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash 40395592, now seen corresponding path program 1 times [2025-03-08 17:36:49,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:49,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135237306] [2025-03-08 17:36:49,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:49,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:49,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:49,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:49,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:49,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135237306] [2025-03-08 17:36:49,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135237306] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619610404] [2025-03-08 17:36:49,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:49,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:49,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:49,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:36:49,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:49,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:49,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:49,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:49,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:36:49,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:49,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619610404] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:49,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 17:36:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695172863] [2025-03-08 17:36:49,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:49,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:36:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:49,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:36:49,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:36:49,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:49,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:49,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:49,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:49,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:49,659 INFO L124 PetriNetUnfolderBase]: 636/970 cut-off events. [2025-03-08 17:36:49,659 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2025-03-08 17:36:49,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 970 events. 636/970 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3624 event pairs, 391 based on Foata normal form. 42/1012 useless extension candidates. Maximal degree in co-relation 1440. Up to 567 conditions per place. [2025-03-08 17:36:49,664 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 51 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2025-03-08 17:36:49,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 322 flow [2025-03-08 17:36:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2025-03-08 17:36:49,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2025-03-08 17:36:49,666 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 128 flow. Second operand 6 states and 77 transitions. [2025-03-08 17:36:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 322 flow [2025-03-08 17:36:49,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 312 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-08 17:36:49,673 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 147 flow [2025-03-08 17:36:49,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2025-03-08 17:36:49,674 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2025-03-08 17:36:49,674 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 147 flow [2025-03-08 17:36:49,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:49,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:49,674 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:49,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:36:49,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 17:36:49,879 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:49,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -836740367, now seen corresponding path program 1 times [2025-03-08 17:36:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201069567] [2025-03-08 17:36:49,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:49,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:49,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:49,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:49,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:50,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:50,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201069567] [2025-03-08 17:36:50,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201069567] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:50,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229555130] [2025-03-08 17:36:50,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:50,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:50,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:36:50,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:36:50,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:50,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:50,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:50,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:36:50,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:50,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:50,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229555130] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:50,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:50,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-08 17:36:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851149714] [2025-03-08 17:36:50,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:50,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:36:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:50,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:36:50,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:36:50,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:50,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 147 flow. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:50,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:50,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:50,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:50,420 INFO L124 PetriNetUnfolderBase]: 511/785 cut-off events. [2025-03-08 17:36:50,421 INFO L125 PetriNetUnfolderBase]: For 689/689 co-relation queries the response was YES. [2025-03-08 17:36:50,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 785 events. 511/785 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2742 event pairs, 324 based on Foata normal form. 27/812 useless extension candidates. Maximal degree in co-relation 1590. Up to 567 conditions per place. [2025-03-08 17:36:50,426 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 3 changer transitions 24/52 dead transitions. [2025-03-08 17:36:50,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 311 flow [2025-03-08 17:36:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2025-03-08 17:36:50,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2025-03-08 17:36:50,429 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 147 flow. Second operand 6 states and 73 transitions. [2025-03-08 17:36:50,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 311 flow [2025-03-08 17:36:50,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 304 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:36:50,431 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 118 flow [2025-03-08 17:36:50,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2025-03-08 17:36:50,434 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2025-03-08 17:36:50,434 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 118 flow [2025-03-08 17:36:50,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:50,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:50,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:50,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:50,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:50,636 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:50,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash -264439399, now seen corresponding path program 2 times [2025-03-08 17:36:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:50,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366862603] [2025-03-08 17:36:50,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:50,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:50,649 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:50,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:50,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:50,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366862603] [2025-03-08 17:36:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366862603] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277572701] [2025-03-08 17:36:50,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:50,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:50,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:36:50,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:50,804 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:50,804 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:50,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:50,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:50,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:50,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277572701] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:50,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:50,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-03-08 17:36:50,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659474806] [2025-03-08 17:36:50,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:50,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:36:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:50,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:36:50,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:36:50,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:50,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:50,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:50,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:50,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:51,144 INFO L124 PetriNetUnfolderBase]: 517/765 cut-off events. [2025-03-08 17:36:51,145 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-03-08 17:36:51,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 765 events. 517/765 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2635 event pairs, 150 based on Foata normal form. 14/779 useless extension candidates. Maximal degree in co-relation 2317. Up to 379 conditions per place. [2025-03-08 17:36:51,150 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2025-03-08 17:36:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 66 transitions, 406 flow [2025-03-08 17:36:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:36:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:36:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2025-03-08 17:36:51,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41203703703703703 [2025-03-08 17:36:51,152 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 118 flow. Second operand 8 states and 89 transitions. [2025-03-08 17:36:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 66 transitions, 406 flow [2025-03-08 17:36:51,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 332 flow, removed 34 selfloop flow, removed 9 redundant places. [2025-03-08 17:36:51,157 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 149 flow [2025-03-08 17:36:51,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2025-03-08 17:36:51,157 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2025-03-08 17:36:51,158 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 149 flow [2025-03-08 17:36:51,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:51,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:51,160 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:51,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:51,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:51,361 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:51,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash 383011149, now seen corresponding path program 3 times [2025-03-08 17:36:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:51,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308757678] [2025-03-08 17:36:51,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:36:51,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:51,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:51,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:51,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:36:51,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308757678] [2025-03-08 17:36:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308757678] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169263666] [2025-03-08 17:36:51,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:36:51,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:51,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:51,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:51,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:36:51,484 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:51,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:51,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:36:51,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:51,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:51,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:51,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169263666] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-03-08 17:36:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365644574] [2025-03-08 17:36:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:51,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:36:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:51,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:36:51,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:36:51,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:51,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:51,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:51,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:51,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:51,799 INFO L124 PetriNetUnfolderBase]: 678/1006 cut-off events. [2025-03-08 17:36:51,799 INFO L125 PetriNetUnfolderBase]: For 907/907 co-relation queries the response was YES. [2025-03-08 17:36:51,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1006 events. 678/1006 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3615 event pairs, 240 based on Foata normal form. 12/1018 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2025-03-08 17:36:51,806 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2025-03-08 17:36:51,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 447 flow [2025-03-08 17:36:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:36:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:36:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2025-03-08 17:36:51,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2025-03-08 17:36:51,808 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 149 flow. Second operand 8 states and 85 transitions. [2025-03-08 17:36:51,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 447 flow [2025-03-08 17:36:51,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 410 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-08 17:36:51,812 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 206 flow [2025-03-08 17:36:51,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2025-03-08 17:36:51,813 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2025-03-08 17:36:51,814 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 206 flow [2025-03-08 17:36:51,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:51,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:51,814 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:51,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:52,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:52,015 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:52,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash 512570425, now seen corresponding path program 4 times [2025-03-08 17:36:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:52,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078478429] [2025-03-08 17:36:52,016 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:36:52,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:52,022 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:52,027 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:52,027 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:36:52,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078478429] [2025-03-08 17:36:52,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078478429] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683913403] [2025-03-08 17:36:52,097 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:36:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:52,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:52,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:36:52,143 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:52,160 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:52,161 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:36:52,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:52,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:52,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:52,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683913403] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:52,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:52,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-03-08 17:36:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321559602] [2025-03-08 17:36:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:52,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:36:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:52,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:36:52,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:36:52,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:52,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:52,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:52,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:52,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:52,522 INFO L124 PetriNetUnfolderBase]: 784/1168 cut-off events. [2025-03-08 17:36:52,522 INFO L125 PetriNetUnfolderBase]: For 1935/1935 co-relation queries the response was YES. [2025-03-08 17:36:52,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4080 conditions, 1168 events. 784/1168 cut-off events. For 1935/1935 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4384 event pairs, 319 based on Foata normal form. 14/1182 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2025-03-08 17:36:52,530 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2025-03-08 17:36:52,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 531 flow [2025-03-08 17:36:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:36:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:36:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2025-03-08 17:36:52,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2025-03-08 17:36:52,532 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 206 flow. Second operand 8 states and 87 transitions. [2025-03-08 17:36:52,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 531 flow [2025-03-08 17:36:52,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 488 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-03-08 17:36:52,537 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 303 flow [2025-03-08 17:36:52,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2025-03-08 17:36:52,538 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2025-03-08 17:36:52,538 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 303 flow [2025-03-08 17:36:52,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:52,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:52,538 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:52,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:36:52,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:52,739 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:52,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash -824638035, now seen corresponding path program 5 times [2025-03-08 17:36:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396447395] [2025-03-08 17:36:52,740 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:36:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:52,746 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:52,752 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:52,752 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:52,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396447395] [2025-03-08 17:36:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396447395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257575190] [2025-03-08 17:36:52,828 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:36:52,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:52,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:52,830 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:36:52,874 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:52,890 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:52,891 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:52,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:52,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:36:52,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:52,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257575190] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:52,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:52,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-08 17:36:52,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055200099] [2025-03-08 17:36:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:52,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:36:52,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:52,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:36:52,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:36:52,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:52,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 303 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:52,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:52,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:52,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:53,440 INFO L124 PetriNetUnfolderBase]: 770/1154 cut-off events. [2025-03-08 17:36:53,441 INFO L125 PetriNetUnfolderBase]: For 3005/3005 co-relation queries the response was YES. [2025-03-08 17:36:53,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1154 events. 770/1154 cut-off events. For 3005/3005 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4480 event pairs, 143 based on Foata normal form. 14/1168 useless extension candidates. Maximal degree in co-relation 4412. Up to 385 conditions per place. [2025-03-08 17:36:53,447 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 92 selfloop transitions, 72 changer transitions 0/165 dead transitions. [2025-03-08 17:36:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 165 transitions, 1348 flow [2025-03-08 17:36:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:36:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:36:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 187 transitions. [2025-03-08 17:36:53,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3645224171539961 [2025-03-08 17:36:53,449 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 303 flow. Second operand 19 states and 187 transitions. [2025-03-08 17:36:53,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 165 transitions, 1348 flow [2025-03-08 17:36:53,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 165 transitions, 1226 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-03-08 17:36:53,455 INFO L231 Difference]: Finished difference. Result has 66 places, 100 transitions, 840 flow [2025-03-08 17:36:53,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=840, PETRI_PLACES=66, PETRI_TRANSITIONS=100} [2025-03-08 17:36:53,456 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2025-03-08 17:36:53,456 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 100 transitions, 840 flow [2025-03-08 17:36:53,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:53,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:53,456 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:53,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:53,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:53,657 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:53,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash -583937171, now seen corresponding path program 6 times [2025-03-08 17:36:53,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:53,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211477095] [2025-03-08 17:36:53,657 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:36:53,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:53,664 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:53,673 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:53,673 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:36:53,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211477095] [2025-03-08 17:36:53,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211477095] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489347767] [2025-03-08 17:36:53,732 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:36:53,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:53,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:53,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:36:53,783 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:53,800 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:53,801 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:36:53,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:53,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:53,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:53,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489347767] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:53,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2025-03-08 17:36:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633129893] [2025-03-08 17:36:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:53,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:36:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:53,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:36:53,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:36:53,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 100 transitions, 840 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:54,165 INFO L124 PetriNetUnfolderBase]: 753/1119 cut-off events. [2025-03-08 17:36:54,165 INFO L125 PetriNetUnfolderBase]: For 3218/3218 co-relation queries the response was YES. [2025-03-08 17:36:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4779 conditions, 1119 events. 753/1119 cut-off events. For 3218/3218 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4215 event pairs, 234 based on Foata normal form. 12/1131 useless extension candidates. Maximal degree in co-relation 4741. Up to 806 conditions per place. [2025-03-08 17:36:54,173 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 85 selfloop transitions, 47 changer transitions 0/133 dead transitions. [2025-03-08 17:36:54,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 133 transitions, 1250 flow [2025-03-08 17:36:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:36:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:36:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2025-03-08 17:36:54,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2025-03-08 17:36:54,175 INFO L175 Difference]: Start difference. First operand has 66 places, 100 transitions, 840 flow. Second operand 9 states and 95 transitions. [2025-03-08 17:36:54,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 133 transitions, 1250 flow [2025-03-08 17:36:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 133 transitions, 1113 flow, removed 42 selfloop flow, removed 5 redundant places. [2025-03-08 17:36:54,187 INFO L231 Difference]: Finished difference. Result has 70 places, 104 transitions, 848 flow [2025-03-08 17:36:54,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=848, PETRI_PLACES=70, PETRI_TRANSITIONS=104} [2025-03-08 17:36:54,188 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2025-03-08 17:36:54,188 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 104 transitions, 848 flow [2025-03-08 17:36:54,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:54,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:54,189 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:54,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:36:54,393 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,SelfDestructingSolverStorable9 [2025-03-08 17:36:54,393 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:54,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1757237107, now seen corresponding path program 7 times [2025-03-08 17:36:54,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:54,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324799121] [2025-03-08 17:36:54,394 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:36:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:54,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-08 17:36:54,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:54,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:54,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:54,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:54,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324799121] [2025-03-08 17:36:54,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324799121] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:54,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89735013] [2025-03-08 17:36:54,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:36:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:54,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:54,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:36:54,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-08 17:36:54,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:54,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:54,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:54,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:54,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:54,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89735013] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:54,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2025-03-08 17:36:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148033511] [2025-03-08 17:36:54,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:54,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:36:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:54,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:36:54,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:36:54,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:54,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 104 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:54,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:54,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:54,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:54,966 INFO L124 PetriNetUnfolderBase]: 736/1084 cut-off events. [2025-03-08 17:36:54,966 INFO L125 PetriNetUnfolderBase]: For 3263/3263 co-relation queries the response was YES. [2025-03-08 17:36:54,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 1084 events. 736/1084 cut-off events. For 3263/3263 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4021 event pairs, 211 based on Foata normal form. 12/1096 useless extension candidates. Maximal degree in co-relation 4616. Up to 619 conditions per place. [2025-03-08 17:36:54,973 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 68 selfloop transitions, 51 changer transitions 0/120 dead transitions. [2025-03-08 17:36:54,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 1122 flow [2025-03-08 17:36:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:36:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:36:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2025-03-08 17:36:54,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2025-03-08 17:36:54,979 INFO L175 Difference]: Start difference. First operand has 70 places, 104 transitions, 848 flow. Second operand 8 states and 86 transitions. [2025-03-08 17:36:54,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 1122 flow [2025-03-08 17:36:54,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 120 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-03-08 17:36:54,988 INFO L231 Difference]: Finished difference. Result has 68 places, 100 transitions, 812 flow [2025-03-08 17:36:54,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=812, PETRI_PLACES=68, PETRI_TRANSITIONS=100} [2025-03-08 17:36:54,989 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2025-03-08 17:36:54,989 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 100 transitions, 812 flow [2025-03-08 17:36:54,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:54,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:54,989 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:54,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:55,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:55,190 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:55,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -152755277, now seen corresponding path program 2 times [2025-03-08 17:36:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:55,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598510594] [2025-03-08 17:36:55,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:55,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:55,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:55,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:55,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598510594] [2025-03-08 17:36:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598510594] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:55,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:36:55,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:36:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699243785] [2025-03-08 17:36:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:55,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:36:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:55,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:36:55,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:36:55,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:55,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 812 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:55,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:55,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:55,468 INFO L124 PetriNetUnfolderBase]: 980/1460 cut-off events. [2025-03-08 17:36:55,469 INFO L125 PetriNetUnfolderBase]: For 4390/4390 co-relation queries the response was YES. [2025-03-08 17:36:55,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6028 conditions, 1460 events. 980/1460 cut-off events. For 4390/4390 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6065 event pairs, 214 based on Foata normal form. 28/1488 useless extension candidates. Maximal degree in co-relation 5988. Up to 814 conditions per place. [2025-03-08 17:36:55,477 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 160 selfloop transitions, 20 changer transitions 3/184 dead transitions. [2025-03-08 17:36:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 184 transitions, 1802 flow [2025-03-08 17:36:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2025-03-08 17:36:55,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2025-03-08 17:36:55,478 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 812 flow. Second operand 6 states and 82 transitions. [2025-03-08 17:36:55,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 184 transitions, 1802 flow [2025-03-08 17:36:55,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 184 transitions, 1639 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-03-08 17:36:55,488 INFO L231 Difference]: Finished difference. Result has 69 places, 112 transitions, 893 flow [2025-03-08 17:36:55,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=893, PETRI_PLACES=69, PETRI_TRANSITIONS=112} [2025-03-08 17:36:55,489 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2025-03-08 17:36:55,489 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 112 transitions, 893 flow [2025-03-08 17:36:55,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:55,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:55,490 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:55,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 17:36:55,490 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:55,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1081657204, now seen corresponding path program 2 times [2025-03-08 17:36:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691596151] [2025-03-08 17:36:55,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:55,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:55,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:55,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:55,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:36:55,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691596151] [2025-03-08 17:36:55,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691596151] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739514610] [2025-03-08 17:36:55,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:55,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:36:55,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 17:36:55,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 17:36:55,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:55,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:55,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:36:55,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:55,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:55,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739514610] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:55,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:55,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2025-03-08 17:36:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828031399] [2025-03-08 17:36:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:55,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:36:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:55,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:36:55,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:36:55,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 112 transitions, 893 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:55,845 INFO L124 PetriNetUnfolderBase]: 721/1054 cut-off events. [2025-03-08 17:36:55,845 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2025-03-08 17:36:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 1054 events. 721/1054 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3844 event pairs, 207 based on Foata normal form. 70/1124 useless extension candidates. Maximal degree in co-relation 4539. Up to 816 conditions per place. [2025-03-08 17:36:55,853 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 114 selfloop transitions, 11 changer transitions 0/126 dead transitions. [2025-03-08 17:36:55,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 126 transitions, 1201 flow [2025-03-08 17:36:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2025-03-08 17:36:55,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3765432098765432 [2025-03-08 17:36:55,855 INFO L175 Difference]: Start difference. First operand has 69 places, 112 transitions, 893 flow. Second operand 6 states and 61 transitions. [2025-03-08 17:36:55,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 126 transitions, 1201 flow [2025-03-08 17:36:55,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 126 transitions, 1161 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-08 17:36:55,863 INFO L231 Difference]: Finished difference. Result has 68 places, 101 transitions, 754 flow [2025-03-08 17:36:55,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=68, PETRI_TRANSITIONS=101} [2025-03-08 17:36:55,864 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2025-03-08 17:36:55,864 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 101 transitions, 754 flow [2025-03-08 17:36:55,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:55,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:55,865 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:55,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:56,069 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,SelfDestructingSolverStorable12 [2025-03-08 17:36:56,069 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:36:56,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1238676715, now seen corresponding path program 1 times [2025-03-08 17:36:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701596147] [2025-03-08 17:36:56,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:56,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:36:56,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:36:56,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:56,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:57,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:57,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701596147] [2025-03-08 17:36:57,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701596147] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:57,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189430098] [2025-03-08 17:36:57,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:57,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:57,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:57,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:36:57,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:36:57,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:36:57,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:57,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:57,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-08 17:36:57,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:57,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:36:57,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:36:57,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2025-03-08 17:36:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:57,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:59,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2025-03-08 17:36:59,065 INFO L349 Elim1Store]: treesize reduction 23, result has 34.3 percent of original size [2025-03-08 17:36:59,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 91 [2025-03-08 17:36:59,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2025-03-08 17:36:59,111 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2025-03-08 17:36:59,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 122 treesize of output 1 [2025-03-08 17:36:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:59,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189430098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:59,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:59,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-03-08 17:36:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71450913] [2025-03-08 17:36:59,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:59,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:36:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:59,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:36:59,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:36:59,166 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:36:59,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 754 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:59,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:59,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:36:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:00,680 INFO L124 PetriNetUnfolderBase]: 1831/2662 cut-off events. [2025-03-08 17:37:00,681 INFO L125 PetriNetUnfolderBase]: For 6967/6967 co-relation queries the response was YES. [2025-03-08 17:37:00,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11424 conditions, 2662 events. 1831/2662 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11614 event pairs, 197 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 7529. Up to 1051 conditions per place. [2025-03-08 17:37:00,698 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 261 selfloop transitions, 120 changer transitions 1/383 dead transitions. [2025-03-08 17:37:00,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 383 transitions, 3662 flow [2025-03-08 17:37:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:37:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:37:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2025-03-08 17:37:00,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2025-03-08 17:37:00,700 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 754 flow. Second operand 14 states and 185 transitions. [2025-03-08 17:37:00,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 383 transitions, 3662 flow [2025-03-08 17:37:00,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 383 transitions, 3612 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-08 17:37:00,718 INFO L231 Difference]: Finished difference. Result has 82 places, 197 transitions, 1966 flow [2025-03-08 17:37:00,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1966, PETRI_PLACES=82, PETRI_TRANSITIONS=197} [2025-03-08 17:37:00,718 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2025-03-08 17:37:00,718 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 197 transitions, 1966 flow [2025-03-08 17:37:00,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:00,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:00,718 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:00,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 17:37:00,919 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,SelfDestructingSolverStorable13 [2025-03-08 17:37:00,919 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:00,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 382942184, now seen corresponding path program 1 times [2025-03-08 17:37:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:00,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975122546] [2025-03-08 17:37:00,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:00,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:00,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:37:00,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:00,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:00,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975122546] [2025-03-08 17:37:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975122546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114536687] [2025-03-08 17:37:01,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:01,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:01,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:37:01,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:37:01,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:01,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:01,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:01,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:37:01,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:01,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:01,777 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 72 treesize of output 32 [2025-03-08 17:37:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:01,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:02,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:02,157 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 147 treesize of output 132 [2025-03-08 17:37:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114536687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:02,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-08 17:37:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116257883] [2025-03-08 17:37:02,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:02,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:37:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:02,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:37:02,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:37:02,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:02,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 197 transitions, 1966 flow. Second operand has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:02,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:02,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:02,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:03,045 INFO L124 PetriNetUnfolderBase]: 2303/3319 cut-off events. [2025-03-08 17:37:03,045 INFO L125 PetriNetUnfolderBase]: For 12404/12404 co-relation queries the response was YES. [2025-03-08 17:37:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16427 conditions, 3319 events. 2303/3319 cut-off events. For 12404/12404 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14800 event pairs, 308 based on Foata normal form. 2/3321 useless extension candidates. Maximal degree in co-relation 15127. Up to 2610 conditions per place. [2025-03-08 17:37:03,063 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 200 selfloop transitions, 140 changer transitions 1/342 dead transitions. [2025-03-08 17:37:03,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 342 transitions, 3955 flow [2025-03-08 17:37:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2025-03-08 17:37:03,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2025-03-08 17:37:03,066 INFO L175 Difference]: Start difference. First operand has 82 places, 197 transitions, 1966 flow. Second operand 10 states and 119 transitions. [2025-03-08 17:37:03,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 342 transitions, 3955 flow [2025-03-08 17:37:03,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 342 transitions, 3730 flow, removed 74 selfloop flow, removed 4 redundant places. [2025-03-08 17:37:03,129 INFO L231 Difference]: Finished difference. Result has 91 places, 280 transitions, 3096 flow [2025-03-08 17:37:03,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3096, PETRI_PLACES=91, PETRI_TRANSITIONS=280} [2025-03-08 17:37:03,129 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2025-03-08 17:37:03,130 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 280 transitions, 3096 flow [2025-03-08 17:37:03,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:03,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:03,130 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:03,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:03,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:37:03,335 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:03,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1226468367, now seen corresponding path program 2 times [2025-03-08 17:37:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033046575] [2025-03-08 17:37:03,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:03,340 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:03,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:03,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:03,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:03,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033046575] [2025-03-08 17:37:03,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033046575] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:03,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496953518] [2025-03-08 17:37:03,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:03,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:03,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:03,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:37:04,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:04,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:04,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:04,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:04,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 17:37:04,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:04,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:37:04,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:04,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2025-03-08 17:37:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:04,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:05,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496953518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:05,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:05,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 31 [2025-03-08 17:37:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635622522] [2025-03-08 17:37:05,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:05,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 17:37:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:05,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 17:37:05,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2025-03-08 17:37:05,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:05,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 280 transitions, 3096 flow. Second operand has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 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) [2025-03-08 17:37:05,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:05,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:05,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:06,262 INFO L124 PetriNetUnfolderBase]: 2677/3931 cut-off events. [2025-03-08 17:37:06,262 INFO L125 PetriNetUnfolderBase]: For 18187/18187 co-relation queries the response was YES. [2025-03-08 17:37:06,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21046 conditions, 3931 events. 2677/3931 cut-off events. For 18187/18187 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18789 event pairs, 274 based on Foata normal form. 2/3933 useless extension candidates. Maximal degree in co-relation 19639. Up to 3129 conditions per place. [2025-03-08 17:37:06,281 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 262 selfloop transitions, 156 changer transitions 4/423 dead transitions. [2025-03-08 17:37:06,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 423 transitions, 5120 flow [2025-03-08 17:37:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:37:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:37:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 196 transitions. [2025-03-08 17:37:06,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3820662768031189 [2025-03-08 17:37:06,283 INFO L175 Difference]: Start difference. First operand has 91 places, 280 transitions, 3096 flow. Second operand 19 states and 196 transitions. [2025-03-08 17:37:06,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 423 transitions, 5120 flow [2025-03-08 17:37:06,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 423 transitions, 5061 flow, removed 26 selfloop flow, removed 3 redundant places. [2025-03-08 17:37:06,327 INFO L231 Difference]: Finished difference. Result has 113 places, 348 transitions, 4256 flow [2025-03-08 17:37:06,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4256, PETRI_PLACES=113, PETRI_TRANSITIONS=348} [2025-03-08 17:37:06,328 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2025-03-08 17:37:06,328 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 348 transitions, 4256 flow [2025-03-08 17:37:06,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 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) [2025-03-08 17:37:06,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:06,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:06,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 17:37:06,528 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,SelfDestructingSolverStorable15 [2025-03-08 17:37:06,529 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:06,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash 320005051, now seen corresponding path program 3 times [2025-03-08 17:37:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727686069] [2025-03-08 17:37:06,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:06,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:06,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:06,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:06,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:06,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:07,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:07,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727686069] [2025-03-08 17:37:07,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727686069] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:07,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457877974] [2025-03-08 17:37:07,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:07,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:07,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:07,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:37:07,411 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:07,436 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:07,436 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:07,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:07,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 17:37:07,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:07,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:37:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:37:07,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:07,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 56 [2025-03-08 17:37:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:07,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:08,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457877974] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:08,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:08,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 31 [2025-03-08 17:37:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643286904] [2025-03-08 17:37:08,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:08,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 17:37:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:08,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 17:37:08,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2025-03-08 17:37:08,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:08,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 348 transitions, 4256 flow. Second operand has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 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) [2025-03-08 17:37:08,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:08,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:08,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:12,796 INFO L124 PetriNetUnfolderBase]: 5523/8229 cut-off events. [2025-03-08 17:37:12,796 INFO L125 PetriNetUnfolderBase]: For 46541/46541 co-relation queries the response was YES. [2025-03-08 17:37:12,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46171 conditions, 8229 events. 5523/8229 cut-off events. For 46541/46541 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 46018 event pairs, 256 based on Foata normal form. 4/8233 useless extension candidates. Maximal degree in co-relation 45790. Up to 3855 conditions per place. [2025-03-08 17:37:12,843 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 309 selfloop transitions, 611 changer transitions 9/930 dead transitions. [2025-03-08 17:37:12,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 930 transitions, 11652 flow [2025-03-08 17:37:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-08 17:37:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-03-08 17:37:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 535 transitions. [2025-03-08 17:37:12,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2025-03-08 17:37:12,845 INFO L175 Difference]: Start difference. First operand has 113 places, 348 transitions, 4256 flow. Second operand 50 states and 535 transitions. [2025-03-08 17:37:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 930 transitions, 11652 flow [2025-03-08 17:37:13,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 930 transitions, 11295 flow, removed 89 selfloop flow, removed 5 redundant places. [2025-03-08 17:37:13,031 INFO L231 Difference]: Finished difference. Result has 180 places, 729 transitions, 10396 flow [2025-03-08 17:37:13,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10396, PETRI_PLACES=180, PETRI_TRANSITIONS=729} [2025-03-08 17:37:13,031 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2025-03-08 17:37:13,031 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 729 transitions, 10396 flow [2025-03-08 17:37:13,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 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) [2025-03-08 17:37:13,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:13,032 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:13,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 17:37:13,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:13,232 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:13,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2057675024, now seen corresponding path program 2 times [2025-03-08 17:37:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843641951] [2025-03-08 17:37:13,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:13,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:13,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:13,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:13,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:13,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:13,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843641951] [2025-03-08 17:37:13,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843641951] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:13,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540172446] [2025-03-08 17:37:13,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:13,808 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:13,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:37:13,863 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:13,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:13,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:13,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:13,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:37:13,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:14,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:14,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2025-03-08 17:37:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:14,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:14,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:14,544 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 133 treesize of output 130 [2025-03-08 17:37:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540172446] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:14,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:14,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2025-03-08 17:37:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318714312] [2025-03-08 17:37:14,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:14,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:37:14,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:14,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:37:14,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:37:14,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:14,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 729 transitions, 10396 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:14,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:14,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:16,547 INFO L124 PetriNetUnfolderBase]: 6085/9047 cut-off events. [2025-03-08 17:37:16,548 INFO L125 PetriNetUnfolderBase]: For 72281/72281 co-relation queries the response was YES. [2025-03-08 17:37:16,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59979 conditions, 9047 events. 6085/9047 cut-off events. For 72281/72281 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 51129 event pairs, 647 based on Foata normal form. 8/9055 useless extension candidates. Maximal degree in co-relation 59542. Up to 6909 conditions per place. [2025-03-08 17:37:16,613 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 435 selfloop transitions, 461 changer transitions 1/898 dead transitions. [2025-03-08 17:37:16,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 898 transitions, 14295 flow [2025-03-08 17:37:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2025-03-08 17:37:16,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2025-03-08 17:37:16,614 INFO L175 Difference]: Start difference. First operand has 180 places, 729 transitions, 10396 flow. Second operand 10 states and 128 transitions. [2025-03-08 17:37:16,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 898 transitions, 14295 flow [2025-03-08 17:37:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 898 transitions, 12654 flow, removed 750 selfloop flow, removed 4 redundant places. [2025-03-08 17:37:17,463 INFO L231 Difference]: Finished difference. Result has 188 places, 820 transitions, 11496 flow [2025-03-08 17:37:17,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8925, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11496, PETRI_PLACES=188, PETRI_TRANSITIONS=820} [2025-03-08 17:37:17,464 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2025-03-08 17:37:17,464 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 820 transitions, 11496 flow [2025-03-08 17:37:17,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:17,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:17,464 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:17,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:17,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:37:17,665 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:17,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash 782833394, now seen corresponding path program 3 times [2025-03-08 17:37:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:17,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28881770] [2025-03-08 17:37:17,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:17,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:17,671 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:17,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:17,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:17,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28881770] [2025-03-08 17:37:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28881770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764319330] [2025-03-08 17:37:18,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:18,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:18,158 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:18,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:37:18,212 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:18,238 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:18,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:18,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:18,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:37:18,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:18,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:18,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2025-03-08 17:37:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:18,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:18,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:18,763 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 147 treesize of output 132 [2025-03-08 17:37:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764319330] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:19,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2025-03-08 17:37:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454294206] [2025-03-08 17:37:19,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:19,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:37:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:19,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:37:19,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:37:19,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:19,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 820 transitions, 11496 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:19,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:19,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:19,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:20,740 INFO L124 PetriNetUnfolderBase]: 6267/9309 cut-off events. [2025-03-08 17:37:20,740 INFO L125 PetriNetUnfolderBase]: For 63170/63170 co-relation queries the response was YES. [2025-03-08 17:37:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58375 conditions, 9309 events. 6267/9309 cut-off events. For 63170/63170 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 53132 event pairs, 834 based on Foata normal form. 4/9313 useless extension candidates. Maximal degree in co-relation 57947. Up to 8247 conditions per place. [2025-03-08 17:37:20,814 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 634 selfloop transitions, 259 changer transitions 1/895 dead transitions. [2025-03-08 17:37:20,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 895 transitions, 14084 flow [2025-03-08 17:37:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2025-03-08 17:37:20,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2025-03-08 17:37:20,816 INFO L175 Difference]: Start difference. First operand has 188 places, 820 transitions, 11496 flow. Second operand 10 states and 122 transitions. [2025-03-08 17:37:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 895 transitions, 14084 flow [2025-03-08 17:37:21,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 895 transitions, 13675 flow, removed 110 selfloop flow, removed 5 redundant places. [2025-03-08 17:37:21,330 INFO L231 Difference]: Finished difference. Result has 194 places, 838 transitions, 12070 flow [2025-03-08 17:37:21,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11087, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12070, PETRI_PLACES=194, PETRI_TRANSITIONS=838} [2025-03-08 17:37:21,331 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2025-03-08 17:37:21,331 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 838 transitions, 12070 flow [2025-03-08 17:37:21,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:21,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:21,331 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:21,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 17:37:21,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:21,531 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:21,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1165254193, now seen corresponding path program 4 times [2025-03-08 17:37:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:21,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75186809] [2025-03-08 17:37:21,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:21,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:21,537 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:21,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:21,545 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:21,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75186809] [2025-03-08 17:37:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75186809] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445628393] [2025-03-08 17:37:22,083 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:22,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:22,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:37:22,139 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:22,158 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:22,158 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:22,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:22,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 17:37:22,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:22,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:37:22,452 INFO L349 Elim1Store]: treesize reduction 52, result has 50.5 percent of original size [2025-03-08 17:37:22,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 100 [2025-03-08 17:37:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:22,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:37:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445628393] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:23,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:23,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 10] total 28 [2025-03-08 17:37:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249409078] [2025-03-08 17:37:23,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:23,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:37:23,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:23,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:37:23,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:37:23,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:23,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 838 transitions, 12070 flow. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:23,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:23,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:23,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:27,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:37:38,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:37:39,769 INFO L124 PetriNetUnfolderBase]: 6723/9979 cut-off events. [2025-03-08 17:37:39,769 INFO L125 PetriNetUnfolderBase]: For 67910/67910 co-relation queries the response was YES. [2025-03-08 17:37:39,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63906 conditions, 9979 events. 6723/9979 cut-off events. For 67910/67910 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57451 event pairs, 705 based on Foata normal form. 6/9985 useless extension candidates. Maximal degree in co-relation 63679. Up to 7286 conditions per place. [2025-03-08 17:37:39,838 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 457 selfloop transitions, 655 changer transitions 8/1121 dead transitions. [2025-03-08 17:37:39,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1121 transitions, 17410 flow [2025-03-08 17:37:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 17:37:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-08 17:37:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 307 transitions. [2025-03-08 17:37:39,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39208173690932313 [2025-03-08 17:37:39,839 INFO L175 Difference]: Start difference. First operand has 194 places, 838 transitions, 12070 flow. Second operand 29 states and 307 transitions. [2025-03-08 17:37:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1121 transitions, 17410 flow [2025-03-08 17:37:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1121 transitions, 16705 flow, removed 134 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:40,350 INFO L231 Difference]: Finished difference. Result has 228 places, 1011 transitions, 15486 flow [2025-03-08 17:37:40,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11421, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15486, PETRI_PLACES=228, PETRI_TRANSITIONS=1011} [2025-03-08 17:37:40,351 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 199 predicate places. [2025-03-08 17:37:40,351 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 1011 transitions, 15486 flow [2025-03-08 17:37:40,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:40,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:40,351 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:40,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:37:40,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:40,552 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:37:40,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1893337551, now seen corresponding path program 5 times [2025-03-08 17:37:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451429888] [2025-03-08 17:37:40,552 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:40,557 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:40,574 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:40,574 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:40,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451429888] [2025-03-08 17:37:41,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451429888] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613567886] [2025-03-08 17:37:41,332 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:41,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:41,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:41,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:37:41,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:37:41,392 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:37:41,417 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:41,417 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:41,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:41,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 17:37:41,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:41,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:37:41,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:37:41,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:37:41,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2025-03-08 17:37:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:41,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:47,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2025-03-08 17:37:47,162 INFO L349 Elim1Store]: treesize reduction 23, result has 34.3 percent of original size [2025-03-08 17:37:47,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1057 treesize of output 860 [2025-03-08 17:37:47,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2025-03-08 17:37:47,251 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2025-03-08 17:37:47,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1273 treesize of output 1 [2025-03-08 17:37:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613567886] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:47,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2025-03-08 17:37:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760505975] [2025-03-08 17:37:47,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:47,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:37:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:47,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:37:47,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=641, Unknown=1, NotChecked=0, Total=756 [2025-03-08 17:37:47,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:37:47,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 1011 transitions, 15486 flow. Second operand has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:47,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:47,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:37:47,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:53,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:37:57,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:38:01,490 INFO L124 PetriNetUnfolderBase]: 7635/11272 cut-off events. [2025-03-08 17:38:01,490 INFO L125 PetriNetUnfolderBase]: For 87467/87467 co-relation queries the response was YES. [2025-03-08 17:38:01,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75510 conditions, 11272 events. 7635/11272 cut-off events. For 87467/87467 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65350 event pairs, 812 based on Foata normal form. 5/11277 useless extension candidates. Maximal degree in co-relation 75248. Up to 4609 conditions per place. [2025-03-08 17:38:01,606 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1118 selfloop transitions, 502 changer transitions 7/1628 dead transitions. [2025-03-08 17:38:01,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1628 transitions, 25845 flow [2025-03-08 17:38:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 17:38:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-08 17:38:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 373 transitions. [2025-03-08 17:38:01,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4604938271604938 [2025-03-08 17:38:01,609 INFO L175 Difference]: Start difference. First operand has 228 places, 1011 transitions, 15486 flow. Second operand 30 states and 373 transitions. [2025-03-08 17:38:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1628 transitions, 25845 flow [2025-03-08 17:38:02,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1628 transitions, 24828 flow, removed 451 selfloop flow, removed 6 redundant places. [2025-03-08 17:38:02,417 INFO L231 Difference]: Finished difference. Result has 270 places, 1155 transitions, 18038 flow [2025-03-08 17:38:02,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=14737, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18038, PETRI_PLACES=270, PETRI_TRANSITIONS=1155} [2025-03-08 17:38:02,418 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 241 predicate places. [2025-03-08 17:38:02,418 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 1155 transitions, 18038 flow [2025-03-08 17:38:02,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:02,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:02,419 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:02,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:38:02,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:02,619 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:38:02,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 710758484, now seen corresponding path program 4 times [2025-03-08 17:38:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:02,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943618289] [2025-03-08 17:38:02,620 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:02,625 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:38:02,634 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:38:02,634 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:02,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943618289] [2025-03-08 17:38:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943618289] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713605101] [2025-03-08 17:38:03,581 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:03,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:03,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:03,583 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:03,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:38:03,637 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:38:03,658 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:38:03,658 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:03,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:03,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:38:03,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:03,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:38:03,792 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 72 treesize of output 32 [2025-03-08 17:38:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:03,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:04,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:38:04,099 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 137 treesize of output 122 [2025-03-08 17:38:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713605101] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:04,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-08 17:38:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212417748] [2025-03-08 17:38:04,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:04,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:38:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:04,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:38:04,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:38:04,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:38:04,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1155 transitions, 18038 flow. Second operand has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:04,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:04,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:38:04,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:07,363 INFO L124 PetriNetUnfolderBase]: 7917/11679 cut-off events. [2025-03-08 17:38:07,363 INFO L125 PetriNetUnfolderBase]: For 101895/101895 co-relation queries the response was YES. [2025-03-08 17:38:07,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81728 conditions, 11679 events. 7917/11679 cut-off events. For 101895/101895 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 67960 event pairs, 948 based on Foata normal form. 6/11685 useless extension candidates. Maximal degree in co-relation 81438. Up to 10605 conditions per place. [2025-03-08 17:38:07,507 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 974 selfloop transitions, 248 changer transitions 1/1224 dead transitions. [2025-03-08 17:38:07,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1224 transitions, 21142 flow [2025-03-08 17:38:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:38:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:38:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2025-03-08 17:38:07,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-03-08 17:38:07,508 INFO L175 Difference]: Start difference. First operand has 270 places, 1155 transitions, 18038 flow. Second operand 10 states and 120 transitions. [2025-03-08 17:38:07,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1224 transitions, 21142 flow [2025-03-08 17:38:08,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1224 transitions, 20715 flow, removed 123 selfloop flow, removed 7 redundant places. [2025-03-08 17:38:08,469 INFO L231 Difference]: Finished difference. Result has 274 places, 1180 transitions, 18553 flow [2025-03-08 17:38:08,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=17611, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18553, PETRI_PLACES=274, PETRI_TRANSITIONS=1180} [2025-03-08 17:38:08,470 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 245 predicate places. [2025-03-08 17:38:08,470 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 1180 transitions, 18553 flow [2025-03-08 17:38:08,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:08,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:08,470 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:08,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:38:08,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:08,671 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:38:08,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 113175021, now seen corresponding path program 6 times [2025-03-08 17:38:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966821630] [2025-03-08 17:38:08,672 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:38:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:08,677 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:38:08,686 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:38:08,686 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:38:08,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:09,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:09,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966821630] [2025-03-08 17:38:09,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966821630] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:09,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892648921] [2025-03-08 17:38:09,235 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:38:09,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:09,237 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:09,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:38:09,294 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:38:09,319 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:38:09,319 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:38:09,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:09,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 17:38:09,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:09,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:38:09,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2025-03-08 17:38:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:09,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:10,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:38:10,020 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 147 treesize of output 132 [2025-03-08 17:38:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892648921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:10,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2025-03-08 17:38:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283777329] [2025-03-08 17:38:10,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:10,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:38:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:10,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:38:10,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:38:10,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-03-08 17:38:10,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1180 transitions, 18553 flow. Second operand has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:10,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:10,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-03-08 17:38:10,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:14,327 INFO L124 PetriNetUnfolderBase]: 8141/12019 cut-off events. [2025-03-08 17:38:14,328 INFO L125 PetriNetUnfolderBase]: For 106772/106772 co-relation queries the response was YES. [2025-03-08 17:38:14,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84755 conditions, 12019 events. 8141/12019 cut-off events. For 106772/106772 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 70760 event pairs, 971 based on Foata normal form. 2/12021 useless extension candidates. Maximal degree in co-relation 84464. Up to 10715 conditions per place. [2025-03-08 17:38:14,430 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 996 selfloop transitions, 302 changer transitions 2/1301 dead transitions. [2025-03-08 17:38:14,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1301 transitions, 22335 flow [2025-03-08 17:38:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:38:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:38:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 205 transitions. [2025-03-08 17:38:14,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4218106995884774 [2025-03-08 17:38:14,432 INFO L175 Difference]: Start difference. First operand has 274 places, 1180 transitions, 18553 flow. Second operand 18 states and 205 transitions. [2025-03-08 17:38:14,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1301 transitions, 22335 flow