./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:11:09,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:11:09,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:11:09,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:11:09,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:11:09,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:11:09,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:11:09,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:11:09,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:11:09,479 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:11:09,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:11:09,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:11:09,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:11:09,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:11:09,480 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:11:09,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:11:09,481 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:11:09,482 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:11:09,482 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:11:09,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:11:09,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:11:09,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:11:09,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:11:09,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:11:09,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:11:09,484 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-jdk21/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 -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2025-02-08 01:11:09,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:11:09,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:11:09,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:11:09,728 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:11:09,728 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:11:09,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-08 01:11:10,875 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d10bc389d/790f8dbae49f4cc0b8d68f0281944e76/FLAG1d0297e24 [2025-02-08 01:11:11,158 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:11:11,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-08 01:11:11,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d10bc389d/790f8dbae49f4cc0b8d68f0281944e76/FLAG1d0297e24 [2025-02-08 01:11:11,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d10bc389d/790f8dbae49f4cc0b8d68f0281944e76 [2025-02-08 01:11:11,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:11:11,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:11:11,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:11:11,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:11:11,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:11:11,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0c22e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11, skipping insertion in model container [2025-02-08 01:11:11,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,470 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:11:11,577 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2025-02-08 01:11:11,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:11:11,594 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:11:11,611 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2025-02-08 01:11:11,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:11:11,628 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:11:11,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11 WrapperNode [2025-02-08 01:11:11,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:11:11,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:11:11,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:11:11,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:11:11,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,659 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 99 [2025-02-08 01:11:11,660 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:11:11,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:11:11,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:11:11,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:11:11,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,684 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 01:11:11,687 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,687 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,692 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:11:11,696 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:11:11,697 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:11:11,697 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:11:11,697 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (1/1) ... [2025-02-08 01:11:11,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:11:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:11,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:11:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:11:11,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:11:11,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 01:11:11,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 01:11:11,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 01:11:11,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 01:11:11,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:11:11,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:11:11,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:11:11,756 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:11:11,847 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:11:11,848 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:11:12,091 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:11:12,092 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:11:12,245 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:11:12,246 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:11:12,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:11:12 BoogieIcfgContainer [2025-02-08 01:11:12,246 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:11:12,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:11:12,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:11:12,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:11:12,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:11:11" (1/3) ... [2025-02-08 01:11:12,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a050051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:11:12, skipping insertion in model container [2025-02-08 01:11:12,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:11:11" (2/3) ... [2025-02-08 01:11:12,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a050051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:11:12, skipping insertion in model container [2025-02-08 01:11:12,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:11:12" (3/3) ... [2025-02-08 01:11:12,254 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2025-02-08 01:11:12,263 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:11:12,265 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-symm.wvr.c that has 3 procedures, 23 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-08 01:11:12,265 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:11:12,302 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 01:11:12,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2025-02-08 01:11:12,352 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2025-02-08 01:11:12,353 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:11:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-02-08 01:11:12,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2025-02-08 01:11:12,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2025-02-08 01:11:12,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:11:12,377 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;@105791ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:11:12,377 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-08 01:11:12,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:11:12,389 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2025-02-08 01:11:12,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:11:12,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:12,390 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:12,390 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:12,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2137700248, now seen corresponding path program 1 times [2025-02-08 01:11:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:12,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212863431] [2025-02-08 01:11:12,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:12,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 01:11:12,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 01:11:12,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:12,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:12,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:12,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212863431] [2025-02-08 01:11:12,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212863431] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:12,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:11:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929026264] [2025-02-08 01:11:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:12,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:11:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:12,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:11:12,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:11:12,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:12,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:12,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:12,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:12,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:12,859 INFO L124 PetriNetUnfolderBase]: 171/287 cut-off events. [2025-02-08 01:11:12,859 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 01:11:12,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 287 events. 171/287 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1107 event pairs, 35 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 501. Up to 159 conditions per place. [2025-02-08 01:11:12,865 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 29 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2025-02-08 01:11:12,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 163 flow [2025-02-08 01:11:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:11:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:11:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-02-08 01:11:12,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2025-02-08 01:11:12,876 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 55 transitions. [2025-02-08 01:11:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 163 flow [2025-02-08 01:11:12,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 01:11:12,884 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 73 flow [2025-02-08 01:11:12,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2025-02-08 01:11:12,890 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2025-02-08 01:11:12,891 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 73 flow [2025-02-08 01:11:12,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:12,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:12,892 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:12,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:11:12,892 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:12,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash 195816200, now seen corresponding path program 1 times [2025-02-08 01:11:12,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:12,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307931955] [2025-02-08 01:11:12,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:12,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 01:11:12,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 01:11:12,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:12,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307931955] [2025-02-08 01:11:13,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307931955] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:13,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:13,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 01:11:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614347632] [2025-02-08 01:11:13,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:13,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:11:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:13,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:11:13,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:11:13,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:13,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:13,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:13,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:13,142 INFO L124 PetriNetUnfolderBase]: 222/394 cut-off events. [2025-02-08 01:11:13,142 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-08 01:11:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 394 events. 222/394 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1736 event pairs, 112 based on Foata normal form. 15/394 useless extension candidates. Maximal degree in co-relation 318. Up to 268 conditions per place. [2025-02-08 01:11:13,144 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 36 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2025-02-08 01:11:13,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 204 flow [2025-02-08 01:11:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:11:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:11:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2025-02-08 01:11:13,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2025-02-08 01:11:13,145 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 73 flow. Second operand 5 states and 74 transitions. [2025-02-08 01:11:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 204 flow [2025-02-08 01:11:13,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:11:13,146 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 106 flow [2025-02-08 01:11:13,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2025-02-08 01:11:13,147 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2025-02-08 01:11:13,147 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 106 flow [2025-02-08 01:11:13,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:13,147 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:13,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:11:13,147 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:13,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 393214444, now seen corresponding path program 1 times [2025-02-08 01:11:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943596852] [2025-02-08 01:11:13,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:13,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 01:11:13,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 01:11:13,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:13,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:13,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:13,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943596852] [2025-02-08 01:11:13,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943596852] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:13,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:13,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 01:11:13,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876985730] [2025-02-08 01:11:13,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:13,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:11:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:13,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:11:13,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:11:13,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:13,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:13,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:13,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:13,343 INFO L124 PetriNetUnfolderBase]: 185/326 cut-off events. [2025-02-08 01:11:13,343 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-02-08 01:11:13,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 326 events. 185/326 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1308 event pairs, 90 based on Foata normal form. 5/318 useless extension candidates. Maximal degree in co-relation 634. Up to 268 conditions per place. [2025-02-08 01:11:13,344 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 21 selfloop transitions, 2 changer transitions 13/41 dead transitions. [2025-02-08 01:11:13,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 206 flow [2025-02-08 01:11:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:11:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:11:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-02-08 01:11:13,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 01:11:13,347 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 106 flow. Second operand 5 states and 70 transitions. [2025-02-08 01:11:13,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 206 flow [2025-02-08 01:11:13,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 200 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-08 01:11:13,349 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 90 flow [2025-02-08 01:11:13,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2025-02-08 01:11:13,349 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2025-02-08 01:11:13,349 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 90 flow [2025-02-08 01:11:13,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:13,349 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] [2025-02-08 01:11:13,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:11:13,350 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:13,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 825967760, now seen corresponding path program 1 times [2025-02-08 01:11:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703808870] [2025-02-08 01:11:13,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:13,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 01:11:13,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 01:11:13,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:13,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:13,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703808870] [2025-02-08 01:11:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703808870] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:13,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:13,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:11:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411949520] [2025-02-08 01:11:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:13,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:11:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:13,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:11:13,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:11:13,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:13,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:13,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:13,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:13,577 INFO L124 PetriNetUnfolderBase]: 259/461 cut-off events. [2025-02-08 01:11:13,577 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2025-02-08 01:11:13,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 461 events. 259/461 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2099 event pairs, 105 based on Foata normal form. 15/465 useless extension candidates. Maximal degree in co-relation 1027. Up to 188 conditions per place. [2025-02-08 01:11:13,579 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 46 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2025-02-08 01:11:13,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 57 transitions, 281 flow [2025-02-08 01:11:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:11:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:11:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-02-08 01:11:13,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-08 01:11:13,580 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 90 flow. Second operand 5 states and 84 transitions. [2025-02-08 01:11:13,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 57 transitions, 281 flow [2025-02-08 01:11:13,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 57 transitions, 259 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:13,582 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 115 flow [2025-02-08 01:11:13,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2025-02-08 01:11:13,583 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-02-08 01:11:13,583 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 115 flow [2025-02-08 01:11:13,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:13,583 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] [2025-02-08 01:11:13,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 01:11:13,583 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:13,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1766308932, now seen corresponding path program 1 times [2025-02-08 01:11:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:13,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828521715] [2025-02-08 01:11:13,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:13,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 01:11:13,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 01:11:13,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:13,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:13,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:13,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828521715] [2025-02-08 01:11:13,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828521715] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:13,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:13,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:11:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312364450] [2025-02-08 01:11:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:13,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:11:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:13,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:11:13,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:11:13,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:13,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:13,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:13,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:13,763 INFO L124 PetriNetUnfolderBase]: 262/463 cut-off events. [2025-02-08 01:11:13,763 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-02-08 01:11:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 463 events. 262/463 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2007 event pairs, 87 based on Foata normal form. 5/457 useless extension candidates. Maximal degree in co-relation 1042. Up to 213 conditions per place. [2025-02-08 01:11:13,765 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 32 selfloop transitions, 5 changer transitions 9/51 dead transitions. [2025-02-08 01:11:13,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 263 flow [2025-02-08 01:11:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:11:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:11:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-02-08 01:11:13,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-02-08 01:11:13,766 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 115 flow. Second operand 5 states and 78 transitions. [2025-02-08 01:11:13,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 263 flow [2025-02-08 01:11:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 258 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 01:11:13,767 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 127 flow [2025-02-08 01:11:13,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2025-02-08 01:11:13,767 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2025-02-08 01:11:13,767 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 127 flow [2025-02-08 01:11:13,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:13,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:13,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:13,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 01:11:13,768 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:13,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 901502294, now seen corresponding path program 1 times [2025-02-08 01:11:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6944166] [2025-02-08 01:11:13,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:13,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 01:11:13,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 01:11:13,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:13,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6944166] [2025-02-08 01:11:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6944166] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927662817] [2025-02-08 01:11:13,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:13,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:13,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:11:13,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 01:11:14,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 01:11:14,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:14,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:14,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:11:14,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:14,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927662817] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:14,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:11:14,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2025-02-08 01:11:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540736622] [2025-02-08 01:11:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:14,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:11:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:14,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:11:14,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:11:14,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-02-08 01:11:14,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2025-02-08 01:11:14,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:14,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-02-08 01:11:14,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:14,386 INFO L124 PetriNetUnfolderBase]: 315/536 cut-off events. [2025-02-08 01:11:14,386 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2025-02-08 01:11:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 536 events. 315/536 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2236 event pairs, 88 based on Foata normal form. 15/547 useless extension candidates. Maximal degree in co-relation 1321. Up to 205 conditions per place. [2025-02-08 01:11:14,388 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 40 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2025-02-08 01:11:14,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 291 flow [2025-02-08 01:11:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-02-08 01:11:14,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2025-02-08 01:11:14,390 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 127 flow. Second operand 7 states and 87 transitions. [2025-02-08 01:11:14,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 291 flow [2025-02-08 01:11:14,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 276 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-02-08 01:11:14,391 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 148 flow [2025-02-08 01:11:14,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2025-02-08 01:11:14,392 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 14 predicate places. [2025-02-08 01:11:14,392 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 148 flow [2025-02-08 01:11:14,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2025-02-08 01:11:14,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:14,392 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] [2025-02-08 01:11:14,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:14,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:14,593 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:14,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -451763276, now seen corresponding path program 1 times [2025-02-08 01:11:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882953329] [2025-02-08 01:11:14,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:14,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 01:11:14,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 01:11:14,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:14,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:14,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882953329] [2025-02-08 01:11:14,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882953329] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:14,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092738992] [2025-02-08 01:11:14,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:14,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:14,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:14,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:14,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:11:14,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 01:11:14,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 01:11:14,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:14,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:14,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:11:14,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:14,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:11:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092738992] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:11:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2025-02-08 01:11:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467865794] [2025-02-08 01:11:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:14,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:11:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:14,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:11:14,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:11:14,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-02-08 01:11:14,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2025-02-08 01:11:14,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:14,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-02-08 01:11:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:15,106 INFO L124 PetriNetUnfolderBase]: 320/594 cut-off events. [2025-02-08 01:11:15,106 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2025-02-08 01:11:15,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 594 events. 320/594 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2722 event pairs, 122 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 1503. Up to 203 conditions per place. [2025-02-08 01:11:15,109 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 47 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2025-02-08 01:11:15,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 354 flow [2025-02-08 01:11:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2025-02-08 01:11:15,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-02-08 01:11:15,113 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 148 flow. Second operand 7 states and 91 transitions. [2025-02-08 01:11:15,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 354 flow [2025-02-08 01:11:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 332 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 01:11:15,114 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 162 flow [2025-02-08 01:11:15,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2025-02-08 01:11:15,115 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2025-02-08 01:11:15,115 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 162 flow [2025-02-08 01:11:15,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2025-02-08 01:11:15,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:15,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:15,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:15,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:15,321 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:15,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 497330732, now seen corresponding path program 1 times [2025-02-08 01:11:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:15,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823421606] [2025-02-08 01:11:15,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:15,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:15,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 01:11:15,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:15,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:15,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823421606] [2025-02-08 01:11:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823421606] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:15,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779804417] [2025-02-08 01:11:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:15,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:15,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:15,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:15,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:15,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:15,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:15,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:15,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:15,851 INFO L124 PetriNetUnfolderBase]: 302/577 cut-off events. [2025-02-08 01:11:15,851 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2025-02-08 01:11:15,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 577 events. 302/577 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2661 event pairs, 80 based on Foata normal form. 4/580 useless extension candidates. Maximal degree in co-relation 1540. Up to 431 conditions per place. [2025-02-08 01:11:15,855 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 38 selfloop transitions, 11 changer transitions 5/59 dead transitions. [2025-02-08 01:11:15,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 352 flow [2025-02-08 01:11:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-02-08 01:11:15,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 01:11:15,856 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 162 flow. Second operand 7 states and 98 transitions. [2025-02-08 01:11:15,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 352 flow [2025-02-08 01:11:15,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 332 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:15,858 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 224 flow [2025-02-08 01:11:15,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2025-02-08 01:11:15,858 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2025-02-08 01:11:15,858 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 224 flow [2025-02-08 01:11:15,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:15,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:15,859 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:15,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 01:11:15,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:15,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1741251048, now seen corresponding path program 2 times [2025-02-08 01:11:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:15,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000555637] [2025-02-08 01:11:15,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:15,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:15,878 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:15,878 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:15,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000555637] [2025-02-08 01:11:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000555637] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:16,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:16,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995720164] [2025-02-08 01:11:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:16,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:16,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:16,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:16,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:16,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:16,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:16,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:16,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:16,308 INFO L124 PetriNetUnfolderBase]: 300/569 cut-off events. [2025-02-08 01:11:16,309 INFO L125 PetriNetUnfolderBase]: For 556/562 co-relation queries the response was YES. [2025-02-08 01:11:16,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 569 events. 300/569 cut-off events. For 556/562 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2536 event pairs, 89 based on Foata normal form. 5/574 useless extension candidates. Maximal degree in co-relation 1685. Up to 431 conditions per place. [2025-02-08 01:11:16,311 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 12 changer transitions 8/64 dead transitions. [2025-02-08 01:11:16,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 443 flow [2025-02-08 01:11:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-02-08 01:11:16,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 01:11:16,312 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 224 flow. Second operand 7 states and 98 transitions. [2025-02-08 01:11:16,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 443 flow [2025-02-08 01:11:16,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 425 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-08 01:11:16,315 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 288 flow [2025-02-08 01:11:16,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2025-02-08 01:11:16,316 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2025-02-08 01:11:16,316 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 288 flow [2025-02-08 01:11:16,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:16,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:16,317 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:16,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 01:11:16,317 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:16,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash 798201838, now seen corresponding path program 1 times [2025-02-08 01:11:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:16,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060970919] [2025-02-08 01:11:16,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:16,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 01:11:16,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:16,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:16,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:16,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:16,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060970919] [2025-02-08 01:11:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060970919] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:16,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:16,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019740593] [2025-02-08 01:11:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:16,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:16,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:16,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:16,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:16,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:16,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:16,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:16,764 INFO L124 PetriNetUnfolderBase]: 297/566 cut-off events. [2025-02-08 01:11:16,764 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2025-02-08 01:11:16,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 566 events. 297/566 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2539 event pairs, 83 based on Foata normal form. 5/571 useless extension candidates. Maximal degree in co-relation 1811. Up to 431 conditions per place. [2025-02-08 01:11:16,768 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 37 selfloop transitions, 13 changer transitions 12/67 dead transitions. [2025-02-08 01:11:16,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 501 flow [2025-02-08 01:11:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2025-02-08 01:11:16,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2025-02-08 01:11:16,769 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 288 flow. Second operand 7 states and 101 transitions. [2025-02-08 01:11:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 501 flow [2025-02-08 01:11:16,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-08 01:11:16,775 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 317 flow [2025-02-08 01:11:16,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2025-02-08 01:11:16,777 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2025-02-08 01:11:16,777 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 317 flow [2025-02-08 01:11:16,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:16,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:16,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:16,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 01:11:16,777 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:16,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1617710744, now seen corresponding path program 2 times [2025-02-08 01:11:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333013691] [2025-02-08 01:11:16,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:16,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:16,795 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-02-08 01:11:16,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:11:16,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333013691] [2025-02-08 01:11:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333013691] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:17,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:17,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597975190] [2025-02-08 01:11:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:17,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:17,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:17,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:17,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:17,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:17,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:17,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:17,192 INFO L124 PetriNetUnfolderBase]: 292/557 cut-off events. [2025-02-08 01:11:17,192 INFO L125 PetriNetUnfolderBase]: For 926/939 co-relation queries the response was YES. [2025-02-08 01:11:17,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 557 events. 292/557 cut-off events. For 926/939 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2483 event pairs, 120 based on Foata normal form. 9/564 useless extension candidates. Maximal degree in co-relation 1767. Up to 431 conditions per place. [2025-02-08 01:11:17,195 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 34 selfloop transitions, 14 changer transitions 10/63 dead transitions. [2025-02-08 01:11:17,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 505 flow [2025-02-08 01:11:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-02-08 01:11:17,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 01:11:17,196 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 317 flow. Second operand 7 states and 98 transitions. [2025-02-08 01:11:17,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 505 flow [2025-02-08 01:11:17,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 469 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:17,199 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 327 flow [2025-02-08 01:11:17,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2025-02-08 01:11:17,199 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2025-02-08 01:11:17,199 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 327 flow [2025-02-08 01:11:17,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:17,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:17,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 01:11:17,200 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:17,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1956116776, now seen corresponding path program 3 times [2025-02-08 01:11:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902585050] [2025-02-08 01:11:17,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:17,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:17,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-02-08 01:11:17,211 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 01:11:17,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:17,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902585050] [2025-02-08 01:11:17,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902585050] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:17,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068185040] [2025-02-08 01:11:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:17,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:17,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:17,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:17,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:17,599 INFO L124 PetriNetUnfolderBase]: 280/531 cut-off events. [2025-02-08 01:11:17,599 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-02-08 01:11:17,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 531 events. 280/531 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2317 event pairs, 43 based on Foata normal form. 12/543 useless extension candidates. Maximal degree in co-relation 1697. Up to 303 conditions per place. [2025-02-08 01:11:17,602 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 49 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2025-02-08 01:11:17,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 547 flow [2025-02-08 01:11:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:11:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:11:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2025-02-08 01:11:17,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-02-08 01:11:17,604 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 327 flow. Second operand 8 states and 114 transitions. [2025-02-08 01:11:17,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 547 flow [2025-02-08 01:11:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 501 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-08 01:11:17,608 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 329 flow [2025-02-08 01:11:17,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2025-02-08 01:11:17,608 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2025-02-08 01:11:17,608 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 329 flow [2025-02-08 01:11:17,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:17,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:17,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 01:11:17,610 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:17,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1390194828, now seen corresponding path program 4 times [2025-02-08 01:11:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978990968] [2025-02-08 01:11:17,610 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:17,616 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:17,630 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:17,630 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:11:17,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978990968] [2025-02-08 01:11:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978990968] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:17,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:17,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:17,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951440452] [2025-02-08 01:11:17,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:17,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:17,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:17,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:17,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:17,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 329 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:17,978 INFO L124 PetriNetUnfolderBase]: 297/560 cut-off events. [2025-02-08 01:11:17,978 INFO L125 PetriNetUnfolderBase]: For 1011/1011 co-relation queries the response was YES. [2025-02-08 01:11:17,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 560 events. 297/560 cut-off events. For 1011/1011 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2466 event pairs, 103 based on Foata normal form. 12/570 useless extension candidates. Maximal degree in co-relation 1863. Up to 470 conditions per place. [2025-02-08 01:11:17,981 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 43 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2025-02-08 01:11:17,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 501 flow [2025-02-08 01:11:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2025-02-08 01:11:17,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2025-02-08 01:11:17,982 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 329 flow. Second operand 7 states and 97 transitions. [2025-02-08 01:11:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 501 flow [2025-02-08 01:11:17,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 446 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-02-08 01:11:17,985 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 320 flow [2025-02-08 01:11:17,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2025-02-08 01:11:17,985 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2025-02-08 01:11:17,985 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 320 flow [2025-02-08 01:11:17,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:17,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:17,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:17,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 01:11:17,986 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:17,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 137185446, now seen corresponding path program 3 times [2025-02-08 01:11:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978389748] [2025-02-08 01:11:17,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:17,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:17,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:18,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:18,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:18,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:18,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978389748] [2025-02-08 01:11:18,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978389748] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409036758] [2025-02-08 01:11:18,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:18,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:18,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:18,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:11:18,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:18,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:18,240 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:18,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:18,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 01:11:18,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:18,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:11:18,332 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 29 treesize of output 21 [2025-02-08 01:11:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:18,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:18,425 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 01:11:18,425 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 40 treesize of output 56 [2025-02-08 01:11:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409036758] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:18,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:11:18,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2025-02-08 01:11:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732037946] [2025-02-08 01:11:18,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:18,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:11:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:18,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:11:18,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-02-08 01:11:18,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:18,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:18,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:18,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:18,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:18,596 INFO L124 PetriNetUnfolderBase]: 337/646 cut-off events. [2025-02-08 01:11:18,596 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2025-02-08 01:11:18,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 646 events. 337/646 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3050 event pairs, 109 based on Foata normal form. 10/656 useless extension candidates. Maximal degree in co-relation 2086. Up to 492 conditions per place. [2025-02-08 01:11:18,600 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 49 selfloop transitions, 13 changer transitions 0/67 dead transitions. [2025-02-08 01:11:18,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 507 flow [2025-02-08 01:11:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:11:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:11:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2025-02-08 01:11:18,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2025-02-08 01:11:18,601 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 320 flow. Second operand 6 states and 93 transitions. [2025-02-08 01:11:18,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 507 flow [2025-02-08 01:11:18,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 479 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:18,604 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 333 flow [2025-02-08 01:11:18,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2025-02-08 01:11:18,604 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2025-02-08 01:11:18,604 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 333 flow [2025-02-08 01:11:18,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:18,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:18,605 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:18,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:18,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:18,809 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:18,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 859912788, now seen corresponding path program 4 times [2025-02-08 01:11:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69782342] [2025-02-08 01:11:18,809 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:18,815 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:18,835 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:18,835 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:11:18,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:18,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69782342] [2025-02-08 01:11:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69782342] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:18,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:18,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750319465] [2025-02-08 01:11:18,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:19,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:19,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:19,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:19,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:19,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:19,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:19,152 INFO L124 PetriNetUnfolderBase]: 307/580 cut-off events. [2025-02-08 01:11:19,152 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2025-02-08 01:11:19,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 580 events. 307/580 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2591 event pairs, 109 based on Foata normal form. 5/585 useless extension candidates. Maximal degree in co-relation 1937. Up to 509 conditions per place. [2025-02-08 01:11:19,156 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 4/58 dead transitions. [2025-02-08 01:11:19,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 450 flow [2025-02-08 01:11:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2025-02-08 01:11:19,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-02-08 01:11:19,157 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 333 flow. Second operand 7 states and 91 transitions. [2025-02-08 01:11:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 450 flow [2025-02-08 01:11:19,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 428 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 01:11:19,160 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 316 flow [2025-02-08 01:11:19,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=316, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2025-02-08 01:11:19,161 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2025-02-08 01:11:19,161 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 316 flow [2025-02-08 01:11:19,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:19,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:19,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:19,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 01:11:19,162 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:19,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 430109412, now seen corresponding path program 5 times [2025-02-08 01:11:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838710189] [2025-02-08 01:11:19,162 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:19,172 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:19,179 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:19,179 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:19,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838710189] [2025-02-08 01:11:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838710189] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451260721] [2025-02-08 01:11:19,392 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:19,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 01:11:19,436 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:19,452 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:19,452 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:19,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:19,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 01:11:19,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:19,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:11:19,535 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 29 treesize of output 25 [2025-02-08 01:11:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:19,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:19,629 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 01:11:19,629 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 40 treesize of output 56 [2025-02-08 01:11:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451260721] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:19,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:11:19,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 14 [2025-02-08 01:11:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940008777] [2025-02-08 01:11:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:19,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:11:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:19,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:11:19,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:11:19,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:19,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:19,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:19,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:19,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:19,778 INFO L124 PetriNetUnfolderBase]: 293/566 cut-off events. [2025-02-08 01:11:19,778 INFO L125 PetriNetUnfolderBase]: For 911/915 co-relation queries the response was YES. [2025-02-08 01:11:19,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 566 events. 293/566 cut-off events. For 911/915 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2556 event pairs, 91 based on Foata normal form. 16/582 useless extension candidates. Maximal degree in co-relation 1863. Up to 424 conditions per place. [2025-02-08 01:11:19,782 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 44 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2025-02-08 01:11:19,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 473 flow [2025-02-08 01:11:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:11:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:11:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-02-08 01:11:19,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-02-08 01:11:19,783 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 316 flow. Second operand 6 states and 88 transitions. [2025-02-08 01:11:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 473 flow [2025-02-08 01:11:19,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:19,786 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 321 flow [2025-02-08 01:11:19,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2025-02-08 01:11:19,786 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2025-02-08 01:11:19,787 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 321 flow [2025-02-08 01:11:19,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:19,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:19,787 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:19,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:19,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-08 01:11:19,991 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:19,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash -351750492, now seen corresponding path program 6 times [2025-02-08 01:11:19,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:19,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544774439] [2025-02-08 01:11:19,992 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:11:19,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:20,001 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:20,007 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-02-08 01:11:20,007 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-08 01:11:20,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544774439] [2025-02-08 01:11:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544774439] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:20,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:11:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552815115] [2025-02-08 01:11:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:20,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:20,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:20,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:20,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:20,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:20,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 321 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:20,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:20,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:20,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:20,315 INFO L124 PetriNetUnfolderBase]: 267/508 cut-off events. [2025-02-08 01:11:20,315 INFO L125 PetriNetUnfolderBase]: For 973/977 co-relation queries the response was YES. [2025-02-08 01:11:20,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1775 conditions, 508 events. 267/508 cut-off events. For 973/977 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2190 event pairs, 83 based on Foata normal form. 8/514 useless extension candidates. Maximal degree in co-relation 1741. Up to 443 conditions per place. [2025-02-08 01:11:20,318 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 33 selfloop transitions, 11 changer transitions 3/52 dead transitions. [2025-02-08 01:11:20,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 52 transitions, 415 flow [2025-02-08 01:11:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2025-02-08 01:11:20,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2025-02-08 01:11:20,319 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 321 flow. Second operand 7 states and 86 transitions. [2025-02-08 01:11:20,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 52 transitions, 415 flow [2025-02-08 01:11:20,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 393 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 01:11:20,322 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 301 flow [2025-02-08 01:11:20,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=301, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2025-02-08 01:11:20,322 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-02-08 01:11:20,322 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 301 flow [2025-02-08 01:11:20,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:20,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:20,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:20,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-08 01:11:20,323 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:20,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -50571834, now seen corresponding path program 5 times [2025-02-08 01:11:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970328284] [2025-02-08 01:11:20,323 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:20,327 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:20,333 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:20,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:20,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970328284] [2025-02-08 01:11:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970328284] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361827063] [2025-02-08 01:11:20,516 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:20,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:20,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:20,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:20,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 01:11:20,558 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:20,578 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:20,578 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:20,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:20,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 01:11:20,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:20,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:11:20,695 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 29 treesize of output 21 [2025-02-08 01:11:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:20,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:11:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361827063] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:20,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:11:20,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2025-02-08 01:11:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437964842] [2025-02-08 01:11:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:20,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:20,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:20,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-02-08 01:11:20,749 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:20,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:20,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:20,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:20,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:20,903 INFO L124 PetriNetUnfolderBase]: 280/527 cut-off events. [2025-02-08 01:11:20,903 INFO L125 PetriNetUnfolderBase]: For 992/996 co-relation queries the response was YES. [2025-02-08 01:11:20,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 527 events. 280/527 cut-off events. For 992/996 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2268 event pairs, 91 based on Foata normal form. 14/541 useless extension candidates. Maximal degree in co-relation 1808. Up to 451 conditions per place. [2025-02-08 01:11:20,906 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 38 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2025-02-08 01:11:20,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 446 flow [2025-02-08 01:11:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2025-02-08 01:11:20,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2025-02-08 01:11:20,908 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 301 flow. Second operand 7 states and 89 transitions. [2025-02-08 01:11:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 446 flow [2025-02-08 01:11:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 424 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:20,911 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 319 flow [2025-02-08 01:11:20,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=319, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2025-02-08 01:11:20,912 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-02-08 01:11:20,913 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 319 flow [2025-02-08 01:11:20,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:20,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:20,913 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:20,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 01:11:21,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 01:11:21,118 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:21,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash -637955114, now seen corresponding path program 6 times [2025-02-08 01:11:21,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:21,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224177415] [2025-02-08 01:11:21,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:11:21,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:21,125 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:21,137 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:21,137 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:11:21,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:21,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224177415] [2025-02-08 01:11:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224177415] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476855599] [2025-02-08 01:11:21,308 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:11:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:21,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:21,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 01:11:21,350 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-08 01:11:21,369 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:11:21,369 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:11:21,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:21,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 01:11:21,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:21,474 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-08 01:11:21,474 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 26 treesize of output 10 [2025-02-08 01:11:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:21,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:21,552 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 01:11:21,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-02-08 01:11:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476855599] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:21,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2025-02-08 01:11:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37679285] [2025-02-08 01:11:21,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:21,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 01:11:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:21,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 01:11:21,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-02-08 01:11:21,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:21,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 319 flow. Second operand has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:21,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:21,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:21,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:21,787 INFO L124 PetriNetUnfolderBase]: 245/461 cut-off events. [2025-02-08 01:11:21,787 INFO L125 PetriNetUnfolderBase]: For 1002/1006 co-relation queries the response was YES. [2025-02-08 01:11:21,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1708 conditions, 461 events. 245/461 cut-off events. For 1002/1006 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1872 event pairs, 63 based on Foata normal form. 14/475 useless extension candidates. Maximal degree in co-relation 1673. Up to 328 conditions per place. [2025-02-08 01:11:21,791 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2025-02-08 01:11:21,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 484 flow [2025-02-08 01:11:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:11:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:11:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2025-02-08 01:11:21,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2025-02-08 01:11:21,792 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 319 flow. Second operand 8 states and 101 transitions. [2025-02-08 01:11:21,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 484 flow [2025-02-08 01:11:21,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 460 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:21,796 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 329 flow [2025-02-08 01:11:21,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2025-02-08 01:11:21,797 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2025-02-08 01:11:21,797 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 329 flow [2025-02-08 01:11:21,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:21,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:21,798 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:21,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:22,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:22,000 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:22,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -442002024, now seen corresponding path program 1 times [2025-02-08 01:11:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:22,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378324645] [2025-02-08 01:11:22,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:22,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 01:11:22,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 01:11:22,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:22,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378324645] [2025-02-08 01:11:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378324645] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201002101] [2025-02-08 01:11:22,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:22,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:22,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 01:11:22,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 01:11:22,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 01:11:22,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:22,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:22,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 01:11:22,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:22,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:22,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201002101] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:22,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:22,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2025-02-08 01:11:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317497302] [2025-02-08 01:11:22,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:22,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 01:11:22,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:22,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 01:11:22,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-08 01:11:22,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:22,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:22,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:22,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:22,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:22,324 INFO L124 PetriNetUnfolderBase]: 578/1096 cut-off events. [2025-02-08 01:11:22,324 INFO L125 PetriNetUnfolderBase]: For 2198/2202 co-relation queries the response was YES. [2025-02-08 01:11:22,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 1096 events. 578/1096 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5785 event pairs, 72 based on Foata normal form. 12/1108 useless extension candidates. Maximal degree in co-relation 3722. Up to 440 conditions per place. [2025-02-08 01:11:22,330 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 70 selfloop transitions, 17 changer transitions 2/94 dead transitions. [2025-02-08 01:11:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 743 flow [2025-02-08 01:11:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2025-02-08 01:11:22,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2025-02-08 01:11:22,331 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 329 flow. Second operand 7 states and 122 transitions. [2025-02-08 01:11:22,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 743 flow [2025-02-08 01:11:22,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 685 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-02-08 01:11:22,336 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 410 flow [2025-02-08 01:11:22,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2025-02-08 01:11:22,336 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2025-02-08 01:11:22,336 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 410 flow [2025-02-08 01:11:22,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:22,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:22,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:22,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:22,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:22,542 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:22,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash 470349388, now seen corresponding path program 2 times [2025-02-08 01:11:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074334592] [2025-02-08 01:11:22,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:22,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:22,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 01:11:22,553 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 23 statements. [2025-02-08 01:11:22,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:11:22,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:11:22,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:22,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074334592] [2025-02-08 01:11:22,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074334592] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:22,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:22,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:11:22,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216745439] [2025-02-08 01:11:22,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:22,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:11:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:22,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:11:22,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:11:22,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:22,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2025-02-08 01:11:22,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:22,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:22,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:22,722 INFO L124 PetriNetUnfolderBase]: 723/1361 cut-off events. [2025-02-08 01:11:22,722 INFO L125 PetriNetUnfolderBase]: For 2811/2815 co-relation queries the response was YES. [2025-02-08 01:11:22,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 1361 events. 723/1361 cut-off events. For 2811/2815 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7630 event pairs, 234 based on Foata normal form. 8/1368 useless extension candidates. Maximal degree in co-relation 4778. Up to 1015 conditions per place. [2025-02-08 01:11:22,730 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 59 selfloop transitions, 13 changer transitions 1/78 dead transitions. [2025-02-08 01:11:22,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 676 flow [2025-02-08 01:11:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:11:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:11:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-02-08 01:11:22,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2025-02-08 01:11:22,731 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 410 flow. Second operand 5 states and 81 transitions. [2025-02-08 01:11:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 676 flow [2025-02-08 01:11:22,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 649 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-02-08 01:11:22,737 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 483 flow [2025-02-08 01:11:22,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2025-02-08 01:11:22,737 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2025-02-08 01:11:22,737 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 483 flow [2025-02-08 01:11:22,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2025-02-08 01:11:22,738 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:22,738 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:22,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-08 01:11:22,738 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:22,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1461645316, now seen corresponding path program 3 times [2025-02-08 01:11:22,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:22,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389250788] [2025-02-08 01:11:22,739 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:22,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:22,744 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:11:22,749 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:11:22,749 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:22,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:22,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389250788] [2025-02-08 01:11:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389250788] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207153082] [2025-02-08 01:11:22,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:22,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:22,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:22,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 01:11:22,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:11:22,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:11:22,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:22,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:22,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 01:11:22,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:23,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207153082] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:23,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:23,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 23 [2025-02-08 01:11:23,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215621932] [2025-02-08 01:11:23,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:23,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 01:11:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:23,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 01:11:23,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2025-02-08 01:11:23,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-08 01:11:23,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 483 flow. Second operand has 24 states, 24 states have (on average 7.75) internal successors, (186), 24 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:23,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:23,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-08 01:11:23,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:24,574 INFO L124 PetriNetUnfolderBase]: 2186/4001 cut-off events. [2025-02-08 01:11:24,574 INFO L125 PetriNetUnfolderBase]: For 8033/8033 co-relation queries the response was YES. [2025-02-08 01:11:24,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13994 conditions, 4001 events. 2186/4001 cut-off events. For 8033/8033 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25715 event pairs, 188 based on Foata normal form. 167/4164 useless extension candidates. Maximal degree in co-relation 11684. Up to 710 conditions per place. [2025-02-08 01:11:24,595 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 247 selfloop transitions, 108 changer transitions 54/412 dead transitions. [2025-02-08 01:11:24,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 412 transitions, 3185 flow [2025-02-08 01:11:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-08 01:11:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-02-08 01:11:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 607 transitions. [2025-02-08 01:11:24,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48174603174603176 [2025-02-08 01:11:24,598 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 483 flow. Second operand 45 states and 607 transitions. [2025-02-08 01:11:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 412 transitions, 3185 flow [2025-02-08 01:11:24,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 412 transitions, 3124 flow, removed 18 selfloop flow, removed 1 redundant places. [2025-02-08 01:11:24,622 INFO L231 Difference]: Finished difference. Result has 142 places, 141 transitions, 1602 flow [2025-02-08 01:11:24,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1602, PETRI_PLACES=142, PETRI_TRANSITIONS=141} [2025-02-08 01:11:24,624 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 116 predicate places. [2025-02-08 01:11:24,624 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 141 transitions, 1602 flow [2025-02-08 01:11:24,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.75) internal successors, (186), 24 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:24,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:24,624 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:24,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:24,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:24,828 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:24,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash -417641262, now seen corresponding path program 4 times [2025-02-08 01:11:24,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008999430] [2025-02-08 01:11:24,829 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:24,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:24,838 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:11:24,841 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 25 statements. [2025-02-08 01:11:24,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 01:11:24,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008999430] [2025-02-08 01:11:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008999430] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:11:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-08 01:11:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388039123] [2025-02-08 01:11:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:24,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:24,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:24,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:24,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:11:24,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-08 01:11:24,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 141 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:24,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:24,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-08 01:11:24,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:25,580 INFO L124 PetriNetUnfolderBase]: 2738/5002 cut-off events. [2025-02-08 01:11:25,580 INFO L125 PetriNetUnfolderBase]: For 37921/37921 co-relation queries the response was YES. [2025-02-08 01:11:25,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24140 conditions, 5002 events. 2738/5002 cut-off events. For 37921/37921 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34032 event pairs, 420 based on Foata normal form. 54/5054 useless extension candidates. Maximal degree in co-relation 23553. Up to 1596 conditions per place. [2025-02-08 01:11:25,609 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 147 selfloop transitions, 141 changer transitions 15/306 dead transitions. [2025-02-08 01:11:25,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 306 transitions, 3749 flow [2025-02-08 01:11:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 01:11:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 01:11:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2025-02-08 01:11:25,610 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2025-02-08 01:11:25,610 INFO L175 Difference]: Start difference. First operand has 142 places, 141 transitions, 1602 flow. Second operand 12 states and 187 transitions. [2025-02-08 01:11:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 306 transitions, 3749 flow [2025-02-08 01:11:25,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 306 transitions, 3346 flow, removed 154 selfloop flow, removed 11 redundant places. [2025-02-08 01:11:25,675 INFO L231 Difference]: Finished difference. Result has 149 places, 213 transitions, 2767 flow [2025-02-08 01:11:25,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2767, PETRI_PLACES=149, PETRI_TRANSITIONS=213} [2025-02-08 01:11:25,677 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2025-02-08 01:11:25,677 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 213 transitions, 2767 flow [2025-02-08 01:11:25,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:25,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:25,678 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:25,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-02-08 01:11:25,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:25,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1896279420, now seen corresponding path program 5 times [2025-02-08 01:11:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:25,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831866517] [2025-02-08 01:11:25,679 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:25,684 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:11:25,690 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:11:25,693 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:25,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831866517] [2025-02-08 01:11:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831866517] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402590988] [2025-02-08 01:11:25,731 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:25,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:25,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:25,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:25,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 01:11:25,774 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:11:25,792 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:11:25,793 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:25,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:25,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:11:25,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:25,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:25,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402590988] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:25,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:25,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 01:11:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507432732] [2025-02-08 01:11:25,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:25,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 01:11:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:25,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 01:11:25,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-08 01:11:25,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:25,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 213 transitions, 2767 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:25,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:25,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:25,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:26,434 INFO L124 PetriNetUnfolderBase]: 2124/4107 cut-off events. [2025-02-08 01:11:26,434 INFO L125 PetriNetUnfolderBase]: For 33494/33636 co-relation queries the response was YES. [2025-02-08 01:11:26,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20910 conditions, 4107 events. 2124/4107 cut-off events. For 33494/33636 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29106 event pairs, 1481 based on Foata normal form. 21/4087 useless extension candidates. Maximal degree in co-relation 20210. Up to 3668 conditions per place. [2025-02-08 01:11:26,466 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 171 selfloop transitions, 3 changer transitions 31/215 dead transitions. [2025-02-08 01:11:26,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 215 transitions, 3086 flow [2025-02-08 01:11:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:11:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:11:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2025-02-08 01:11:26,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2025-02-08 01:11:26,467 INFO L175 Difference]: Start difference. First operand has 149 places, 213 transitions, 2767 flow. Second operand 7 states and 89 transitions. [2025-02-08 01:11:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 215 transitions, 3086 flow [2025-02-08 01:11:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 215 transitions, 2912 flow, removed 87 selfloop flow, removed 2 redundant places. [2025-02-08 01:11:26,573 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 2216 flow [2025-02-08 01:11:26,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2216, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2025-02-08 01:11:26,574 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2025-02-08 01:11:26,574 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 2216 flow [2025-02-08 01:11:26,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:26,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:26,575 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:26,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 01:11:26,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:26,775 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:26,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1166473260, now seen corresponding path program 6 times [2025-02-08 01:11:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700063414] [2025-02-08 01:11:26,776 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:11:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:26,782 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:11:26,786 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 26 statements. [2025-02-08 01:11:26,786 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-08 01:11:26,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 01:11:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700063414] [2025-02-08 01:11:26,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700063414] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271115026] [2025-02-08 01:11:26,897 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:11:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:26,899 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:26,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 01:11:26,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:11:26,967 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 26 statements. [2025-02-08 01:11:26,968 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-08 01:11:26,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:26,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 01:11:26,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 01:11:27,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:11:27,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271115026] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:27,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:11:27,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2025-02-08 01:11:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653638413] [2025-02-08 01:11:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:27,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:27,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:27,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 01:11:27,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-08 01:11:27,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 2216 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:27,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:27,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-08 01:11:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:27,701 INFO L124 PetriNetUnfolderBase]: 2641/4853 cut-off events. [2025-02-08 01:11:27,701 INFO L125 PetriNetUnfolderBase]: For 33462/33462 co-relation queries the response was YES. [2025-02-08 01:11:27,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 4853 events. 2641/4853 cut-off events. For 33462/33462 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33606 event pairs, 527 based on Foata normal form. 4/4857 useless extension candidates. Maximal degree in co-relation 23176. Up to 2304 conditions per place. [2025-02-08 01:11:27,730 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 143 selfloop transitions, 123 changer transitions 6/275 dead transitions. [2025-02-08 01:11:27,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 275 transitions, 3542 flow [2025-02-08 01:11:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 01:11:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 01:11:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2025-02-08 01:11:27,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-02-08 01:11:27,731 INFO L175 Difference]: Start difference. First operand has 152 places, 184 transitions, 2216 flow. Second operand 10 states and 124 transitions. [2025-02-08 01:11:27,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 275 transitions, 3542 flow [2025-02-08 01:11:27,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 275 transitions, 3507 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-02-08 01:11:27,826 INFO L231 Difference]: Finished difference. Result has 146 places, 213 transitions, 2858 flow [2025-02-08 01:11:27,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2858, PETRI_PLACES=146, PETRI_TRANSITIONS=213} [2025-02-08 01:11:27,826 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2025-02-08 01:11:27,826 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 213 transitions, 2858 flow [2025-02-08 01:11:27,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:27,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:27,827 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:27,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:28,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-08 01:11:28,028 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:28,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash 149072084, now seen corresponding path program 7 times [2025-02-08 01:11:28,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:28,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376409253] [2025-02-08 01:11:28,029 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:11:28,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:28,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 01:11:28,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:11:28,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:28,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376409253] [2025-02-08 01:11:28,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376409253] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434620740] [2025-02-08 01:11:28,087 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:11:28,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:28,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:28,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:28,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 01:11:28,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 01:11:28,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:11:28,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:28,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:28,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:11:28,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:28,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434620740] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:28,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-08 01:11:28,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956141546] [2025-02-08 01:11:28,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:28,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 01:11:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:28,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 01:11:28,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:11:28,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 213 transitions, 2858 flow. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:28,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:28,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:28,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:28,750 INFO L124 PetriNetUnfolderBase]: 2340/4538 cut-off events. [2025-02-08 01:11:28,750 INFO L125 PetriNetUnfolderBase]: For 37465/37655 co-relation queries the response was YES. [2025-02-08 01:11:28,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22981 conditions, 4538 events. 2340/4538 cut-off events. For 37465/37655 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32873 event pairs, 910 based on Foata normal form. 72/4569 useless extension candidates. Maximal degree in co-relation 22906. Up to 3096 conditions per place. [2025-02-08 01:11:28,782 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 212 selfloop transitions, 32 changer transitions 14/268 dead transitions. [2025-02-08 01:11:28,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 268 transitions, 3983 flow [2025-02-08 01:11:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:11:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:11:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2025-02-08 01:11:28,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2025-02-08 01:11:28,784 INFO L175 Difference]: Start difference. First operand has 146 places, 213 transitions, 2858 flow. Second operand 8 states and 110 transitions. [2025-02-08 01:11:28,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 268 transitions, 3983 flow [2025-02-08 01:11:28,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 268 transitions, 3715 flow, removed 24 selfloop flow, removed 9 redundant places. [2025-02-08 01:11:28,909 INFO L231 Difference]: Finished difference. Result has 141 places, 205 transitions, 2614 flow [2025-02-08 01:11:28,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2614, PETRI_PLACES=141, PETRI_TRANSITIONS=205} [2025-02-08 01:11:28,910 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 115 predicate places. [2025-02-08 01:11:28,910 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 205 transitions, 2614 flow [2025-02-08 01:11:28,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:28,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:28,911 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:28,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:29,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-08 01:11:29,112 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:29,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1942314894, now seen corresponding path program 8 times [2025-02-08 01:11:29,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:29,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576982855] [2025-02-08 01:11:29,113 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:29,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:29,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:11:29,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:11:29,129 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:29,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:29,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576982855] [2025-02-08 01:11:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576982855] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247214525] [2025-02-08 01:11:29,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:29,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:29,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 01:11:29,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:11:29,249 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:11:29,250 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:29,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:29,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:11:29,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:29,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247214525] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:29,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:29,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-08 01:11:29,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023267337] [2025-02-08 01:11:29,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:29,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 01:11:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:29,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 01:11:29,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:11:29,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:29,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 205 transitions, 2614 flow. Second operand has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:29,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:29,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:29,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:29,740 INFO L124 PetriNetUnfolderBase]: 1947/3745 cut-off events. [2025-02-08 01:11:29,741 INFO L125 PetriNetUnfolderBase]: For 25930/26059 co-relation queries the response was YES. [2025-02-08 01:11:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18181 conditions, 3745 events. 1947/3745 cut-off events. For 25930/26059 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26086 event pairs, 675 based on Foata normal form. 33/3742 useless extension candidates. Maximal degree in co-relation 18110. Up to 3025 conditions per place. [2025-02-08 01:11:29,760 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 155 selfloop transitions, 20 changer transitions 32/217 dead transitions. [2025-02-08 01:11:29,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 217 transitions, 3012 flow [2025-02-08 01:11:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:11:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:11:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2025-02-08 01:11:29,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2025-02-08 01:11:29,761 INFO L175 Difference]: Start difference. First operand has 141 places, 205 transitions, 2614 flow. Second operand 8 states and 105 transitions. [2025-02-08 01:11:29,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 217 transitions, 3012 flow [2025-02-08 01:11:29,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 217 transitions, 2989 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:29,835 INFO L231 Difference]: Finished difference. Result has 143 places, 180 transitions, 2258 flow [2025-02-08 01:11:29,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=143, PETRI_TRANSITIONS=180} [2025-02-08 01:11:29,836 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 117 predicate places. [2025-02-08 01:11:29,836 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 180 transitions, 2258 flow [2025-02-08 01:11:29,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:29,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:29,836 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:29,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:30,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:30,036 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:30,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash 336491246, now seen corresponding path program 9 times [2025-02-08 01:11:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:30,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084528327] [2025-02-08 01:11:30,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:30,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:11:30,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:11:30,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:30,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:30,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084528327] [2025-02-08 01:11:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084528327] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:30,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492522752] [2025-02-08 01:11:30,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:30,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:30,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 01:11:30,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:11:30,231 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:11:30,231 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:30,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:30,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 01:11:30,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:30,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:11:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492522752] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:30,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:11:30,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 22 [2025-02-08 01:11:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390827860] [2025-02-08 01:11:30,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:30,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 01:11:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:30,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 01:11:30,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2025-02-08 01:11:30,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-02-08 01:11:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 180 transitions, 2258 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:30,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-02-08 01:11:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:30,830 INFO L124 PetriNetUnfolderBase]: 1962/3616 cut-off events. [2025-02-08 01:11:30,831 INFO L125 PetriNetUnfolderBase]: For 26600/26650 co-relation queries the response was YES. [2025-02-08 01:11:30,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17818 conditions, 3616 events. 1962/3616 cut-off events. For 26600/26650 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23767 event pairs, 528 based on Foata normal form. 95/3697 useless extension candidates. Maximal degree in co-relation 17747. Up to 1966 conditions per place. [2025-02-08 01:11:30,852 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 128 selfloop transitions, 76 changer transitions 0/211 dead transitions. [2025-02-08 01:11:30,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 211 transitions, 3017 flow [2025-02-08 01:11:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 01:11:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 01:11:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2025-02-08 01:11:30,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-02-08 01:11:30,855 INFO L175 Difference]: Start difference. First operand has 143 places, 180 transitions, 2258 flow. Second operand 9 states and 98 transitions. [2025-02-08 01:11:30,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 211 transitions, 3017 flow [2025-02-08 01:11:30,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 211 transitions, 2911 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-02-08 01:11:30,929 INFO L231 Difference]: Finished difference. Result has 136 places, 187 transitions, 2567 flow [2025-02-08 01:11:30,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2567, PETRI_PLACES=136, PETRI_TRANSITIONS=187} [2025-02-08 01:11:30,930 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2025-02-08 01:11:30,930 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 187 transitions, 2567 flow [2025-02-08 01:11:30,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:30,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:30,930 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:30,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 01:11:31,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-08 01:11:31,130 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:31,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1482268220, now seen corresponding path program 10 times [2025-02-08 01:11:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:31,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248380212] [2025-02-08 01:11:31,131 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:31,136 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:11:31,137 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-02-08 01:11:31,137 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 01:11:31,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 01:11:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248380212] [2025-02-08 01:11:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248380212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710037804] [2025-02-08 01:11:31,234 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:31,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:31,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 01:11:31,283 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:11:31,291 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-02-08 01:11:31,291 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 01:11:31,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:31,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 01:11:31,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 01:11:31,377 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:11:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710037804] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:11:31,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:11:31,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2025-02-08 01:11:31,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230741986] [2025-02-08 01:11:31,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:11:31,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:11:31,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:31,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:11:31,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 01:11:31,379 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-08 01:11:31,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 187 transitions, 2567 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:31,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:31,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-08 01:11:31,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:31,836 INFO L124 PetriNetUnfolderBase]: 2110/3877 cut-off events. [2025-02-08 01:11:31,836 INFO L125 PetriNetUnfolderBase]: For 28572/28572 co-relation queries the response was YES. [2025-02-08 01:11:31,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19744 conditions, 3877 events. 2110/3877 cut-off events. For 28572/28572 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25509 event pairs, 377 based on Foata normal form. 5/3882 useless extension candidates. Maximal degree in co-relation 19673. Up to 1036 conditions per place. [2025-02-08 01:11:31,858 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 68 selfloop transitions, 184 changer transitions 6/261 dead transitions. [2025-02-08 01:11:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 261 transitions, 3773 flow [2025-02-08 01:11:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 01:11:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 01:11:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2025-02-08 01:11:31,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2025-02-08 01:11:31,858 INFO L175 Difference]: Start difference. First operand has 136 places, 187 transitions, 2567 flow. Second operand 11 states and 138 transitions. [2025-02-08 01:11:31,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 261 transitions, 3773 flow [2025-02-08 01:11:31,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 261 transitions, 3649 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-08 01:11:31,934 INFO L231 Difference]: Finished difference. Result has 141 places, 218 transitions, 3342 flow [2025-02-08 01:11:31,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3342, PETRI_PLACES=141, PETRI_TRANSITIONS=218} [2025-02-08 01:11:31,935 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 115 predicate places. [2025-02-08 01:11:31,935 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 218 transitions, 3342 flow [2025-02-08 01:11:31,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:31,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:31,935 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:31,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:32,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-08 01:11:32,135 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:32,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -212684824, now seen corresponding path program 11 times [2025-02-08 01:11:32,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141461376] [2025-02-08 01:11:32,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:32,141 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-08 01:11:32,145 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:11:32,145 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:11:32,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:32,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141461376] [2025-02-08 01:11:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141461376] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112214649] [2025-02-08 01:11:32,181 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:32,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:32,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:32,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 01:11:32,235 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-08 01:11:32,251 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:11:32,251 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:11:32,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:32,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 01:11:32,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:32,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:32,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112214649] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:32,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:32,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2025-02-08 01:11:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431925120] [2025-02-08 01:11:32,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:32,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 01:11:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:32,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 01:11:32,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-02-08 01:11:32,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-02-08 01:11:32,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 218 transitions, 3342 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:32,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:32,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-02-08 01:11:32,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:33,011 INFO L124 PetriNetUnfolderBase]: 2998/5442 cut-off events. [2025-02-08 01:11:33,011 INFO L125 PetriNetUnfolderBase]: For 48089/48089 co-relation queries the response was YES. [2025-02-08 01:11:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29715 conditions, 5442 events. 2998/5442 cut-off events. For 48089/48089 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37582 event pairs, 474 based on Foata normal form. 54/5496 useless extension candidates. Maximal degree in co-relation 29643. Up to 1316 conditions per place. [2025-02-08 01:11:33,036 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 241 selfloop transitions, 164 changer transitions 0/408 dead transitions. [2025-02-08 01:11:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 408 transitions, 6527 flow [2025-02-08 01:11:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 01:11:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-08 01:11:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 230 transitions. [2025-02-08 01:11:33,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2025-02-08 01:11:33,037 INFO L175 Difference]: Start difference. First operand has 141 places, 218 transitions, 3342 flow. Second operand 16 states and 230 transitions. [2025-02-08 01:11:33,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 408 transitions, 6527 flow [2025-02-08 01:11:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 408 transitions, 5894 flow, removed 143 selfloop flow, removed 11 redundant places. [2025-02-08 01:11:33,170 INFO L231 Difference]: Finished difference. Result has 150 places, 272 transitions, 4441 flow [2025-02-08 01:11:33,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4441, PETRI_PLACES=150, PETRI_TRANSITIONS=272} [2025-02-08 01:11:33,171 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 124 predicate places. [2025-02-08 01:11:33,171 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 272 transitions, 4441 flow [2025-02-08 01:11:33,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:33,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:33,171 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:33,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 01:11:33,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:33,372 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:33,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1896644298, now seen corresponding path program 1 times [2025-02-08 01:11:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443688672] [2025-02-08 01:11:33,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:33,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:11:33,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:33,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:33,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443688672] [2025-02-08 01:11:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443688672] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633691206] [2025-02-08 01:11:33,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:11:33,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:33,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:33,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 01:11:33,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:11:33,512 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:33,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:11:33,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:33,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:11:33,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:33,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:33,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633691206] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:33,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:33,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2025-02-08 01:11:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885176137] [2025-02-08 01:11:33,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:33,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 01:11:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:33,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 01:11:33,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-02-08 01:11:33,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:33,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 272 transitions, 4441 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:33,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:33,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:33,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:35,648 INFO L124 PetriNetUnfolderBase]: 7287/14412 cut-off events. [2025-02-08 01:11:35,648 INFO L125 PetriNetUnfolderBase]: For 128331/128798 co-relation queries the response was YES. [2025-02-08 01:11:35,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76582 conditions, 14412 events. 7287/14412 cut-off events. For 128331/128798 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 130062 event pairs, 3238 based on Foata normal form. 718/15050 useless extension candidates. Maximal degree in co-relation 66861. Up to 4818 conditions per place. [2025-02-08 01:11:35,764 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 668 selfloop transitions, 135 changer transitions 51/867 dead transitions. [2025-02-08 01:11:35,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 867 transitions, 15447 flow [2025-02-08 01:11:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-08 01:11:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-08 01:11:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 287 transitions. [2025-02-08 01:11:35,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2025-02-08 01:11:35,765 INFO L175 Difference]: Start difference. First operand has 150 places, 272 transitions, 4441 flow. Second operand 22 states and 287 transitions. [2025-02-08 01:11:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 867 transitions, 15447 flow [2025-02-08 01:11:36,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 867 transitions, 15218 flow, removed 62 selfloop flow, removed 3 redundant places. [2025-02-08 01:11:36,828 INFO L231 Difference]: Finished difference. Result has 180 places, 401 transitions, 7202 flow [2025-02-08 01:11:36,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7202, PETRI_PLACES=180, PETRI_TRANSITIONS=401} [2025-02-08 01:11:36,829 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 154 predicate places. [2025-02-08 01:11:36,829 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 401 transitions, 7202 flow [2025-02-08 01:11:36,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:36,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:36,829 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:36,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-08 01:11:37,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:37,030 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:37,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1871602114, now seen corresponding path program 2 times [2025-02-08 01:11:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643107439] [2025-02-08 01:11:37,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:37,035 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:37,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:37,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:37,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643107439] [2025-02-08 01:11:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643107439] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497626645] [2025-02-08 01:11:37,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:11:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:37,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:37,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 01:11:37,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:37,383 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:37,383 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:37,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:37,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-08 01:11:37,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:37,523 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-08 01:11:37,524 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 26 treesize of output 10 [2025-02-08 01:11:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:11:37,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:37,665 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2025-02-08 01:11:37,665 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 42 treesize of output 60 [2025-02-08 01:11:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:37,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497626645] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:37,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 18 [2025-02-08 01:11:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504959559] [2025-02-08 01:11:37,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:37,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 01:11:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:37,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 01:11:37,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-02-08 01:11:37,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:37,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 401 transitions, 7202 flow. Second operand has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:37,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:37,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:37,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:40,476 INFO L124 PetriNetUnfolderBase]: 8073/16386 cut-off events. [2025-02-08 01:11:40,476 INFO L125 PetriNetUnfolderBase]: For 149070/149359 co-relation queries the response was YES. [2025-02-08 01:11:40,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87796 conditions, 16386 events. 8073/16386 cut-off events. For 149070/149359 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 153045 event pairs, 2007 based on Foata normal form. 177/16455 useless extension candidates. Maximal degree in co-relation 78867. Up to 7951 conditions per place. [2025-02-08 01:11:40,568 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 331 selfloop transitions, 213 changer transitions 19/576 dead transitions. [2025-02-08 01:11:40,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 576 transitions, 10790 flow [2025-02-08 01:11:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 01:11:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-08 01:11:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 260 transitions. [2025-02-08 01:11:40,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2025-02-08 01:11:40,572 INFO L175 Difference]: Start difference. First operand has 180 places, 401 transitions, 7202 flow. Second operand 19 states and 260 transitions. [2025-02-08 01:11:40,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 576 transitions, 10790 flow [2025-02-08 01:11:41,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 576 transitions, 10717 flow, removed 30 selfloop flow, removed 5 redundant places. [2025-02-08 01:11:41,900 INFO L231 Difference]: Finished difference. Result has 200 places, 443 transitions, 8601 flow [2025-02-08 01:11:41,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8601, PETRI_PLACES=200, PETRI_TRANSITIONS=443} [2025-02-08 01:11:41,901 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 174 predicate places. [2025-02-08 01:11:41,901 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 443 transitions, 8601 flow [2025-02-08 01:11:41,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:41,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:41,901 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:41,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-08 01:11:42,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:42,102 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:42,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1428520078, now seen corresponding path program 3 times [2025-02-08 01:11:42,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:42,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701673346] [2025-02-08 01:11:42,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:42,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:42,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:42,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:42,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701673346] [2025-02-08 01:11:42,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701673346] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:42,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007829572] [2025-02-08 01:11:42,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:11:42,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:42,306 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:42,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 01:11:42,354 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:42,370 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:42,370 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:11:42,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:42,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 01:11:42,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:42,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:11:42,478 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 29 treesize of output 21 [2025-02-08 01:11:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:42,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:42,558 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2025-02-08 01:11:42,558 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 42 treesize of output 60 [2025-02-08 01:11:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007829572] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:42,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:42,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2025-02-08 01:11:42,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233696162] [2025-02-08 01:11:42,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:42,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 01:11:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:42,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 01:11:42,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-02-08 01:11:42,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:42,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 443 transitions, 8601 flow. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:42,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:42,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:42,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:45,674 INFO L124 PetriNetUnfolderBase]: 8584/17667 cut-off events. [2025-02-08 01:11:45,674 INFO L125 PetriNetUnfolderBase]: For 192729/193026 co-relation queries the response was YES. [2025-02-08 01:11:45,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101368 conditions, 17667 events. 8584/17667 cut-off events. For 192729/193026 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 168843 event pairs, 2382 based on Foata normal form. 58/17605 useless extension candidates. Maximal degree in co-relation 101268. Up to 11630 conditions per place. [2025-02-08 01:11:45,835 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 393 selfloop transitions, 215 changer transitions 9/630 dead transitions. [2025-02-08 01:11:45,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 630 transitions, 12235 flow [2025-02-08 01:11:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 01:11:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 01:11:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 347 transitions. [2025-02-08 01:11:45,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766483516483517 [2025-02-08 01:11:45,836 INFO L175 Difference]: Start difference. First operand has 200 places, 443 transitions, 8601 flow. Second operand 26 states and 347 transitions. [2025-02-08 01:11:45,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 630 transitions, 12235 flow [2025-02-08 01:11:48,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 630 transitions, 11798 flow, removed 103 selfloop flow, removed 8 redundant places. [2025-02-08 01:11:48,605 INFO L231 Difference]: Finished difference. Result has 228 places, 527 transitions, 10694 flow [2025-02-08 01:11:48,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10694, PETRI_PLACES=228, PETRI_TRANSITIONS=527} [2025-02-08 01:11:48,605 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 202 predicate places. [2025-02-08 01:11:48,605 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 527 transitions, 10694 flow [2025-02-08 01:11:48,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:48,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:48,606 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:48,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-08 01:11:48,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:48,806 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:48,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 174318790, now seen corresponding path program 4 times [2025-02-08 01:11:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:48,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476632356] [2025-02-08 01:11:48,807 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:48,813 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:48,824 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:48,824 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:11:48,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476632356] [2025-02-08 01:11:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476632356] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599871025] [2025-02-08 01:11:49,113 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:11:49,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:49,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:49,115 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:49,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 01:11:49,163 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:49,179 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:49,179 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:11:49,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:49,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 01:11:49,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:49,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:11:49,288 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 33 treesize of output 25 [2025-02-08 01:11:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:49,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:49,374 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2025-02-08 01:11:49,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2025-02-08 01:11:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599871025] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:49,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:49,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-02-08 01:11:49,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289693186] [2025-02-08 01:11:49,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:49,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 01:11:49,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:49,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 01:11:49,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-08 01:11:49,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:49,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 527 transitions, 10694 flow. Second operand has 20 states, 20 states have (on average 9.65) internal successors, (193), 20 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:49,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:49,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:49,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:11:52,831 INFO L124 PetriNetUnfolderBase]: 8647/17815 cut-off events. [2025-02-08 01:11:52,831 INFO L125 PetriNetUnfolderBase]: For 229050/229313 co-relation queries the response was YES. [2025-02-08 01:11:52,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107293 conditions, 17815 events. 8647/17815 cut-off events. For 229050/229313 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 170883 event pairs, 2382 based on Foata normal form. 138/17851 useless extension candidates. Maximal degree in co-relation 107181. Up to 11605 conditions per place. [2025-02-08 01:11:53,045 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 409 selfloop transitions, 256 changer transitions 1/679 dead transitions. [2025-02-08 01:11:53,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 679 transitions, 13560 flow [2025-02-08 01:11:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 01:11:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-08 01:11:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 422 transitions. [2025-02-08 01:11:53,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47098214285714285 [2025-02-08 01:11:53,046 INFO L175 Difference]: Start difference. First operand has 228 places, 527 transitions, 10694 flow. Second operand 32 states and 422 transitions. [2025-02-08 01:11:53,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 679 transitions, 13560 flow [2025-02-08 01:11:56,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 679 transitions, 13101 flow, removed 86 selfloop flow, removed 14 redundant places. [2025-02-08 01:11:56,590 INFO L231 Difference]: Finished difference. Result has 247 places, 559 transitions, 11550 flow [2025-02-08 01:11:56,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11550, PETRI_PLACES=247, PETRI_TRANSITIONS=559} [2025-02-08 01:11:56,591 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 221 predicate places. [2025-02-08 01:11:56,591 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 559 transitions, 11550 flow [2025-02-08 01:11:56,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.65) internal successors, (193), 20 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:56,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:11:56,591 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:11:56,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-08 01:11:56,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:56,792 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:11:56,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:11:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1237829418, now seen corresponding path program 5 times [2025-02-08 01:11:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:11:56,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344388494] [2025-02-08 01:11:56,793 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:11:56,797 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:56,806 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:56,807 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:56,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:11:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:11:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344388494] [2025-02-08 01:11:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344388494] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:11:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316793074] [2025-02-08 01:11:57,004 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:11:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:11:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:11:57,006 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:11:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 01:11:57,058 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:11:57,078 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:11:57,078 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:11:57,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:11:57,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 01:11:57,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:11:57,169 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-08 01:11:57,170 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 34 treesize of output 10 [2025-02-08 01:11:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:57,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:11:57,241 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2025-02-08 01:11:57,241 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 42 treesize of output 60 [2025-02-08 01:11:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:11:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316793074] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:11:57,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:11:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2025-02-08 01:11:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016260158] [2025-02-08 01:11:57,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:11:57,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 01:11:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:11:57,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 01:11:57,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2025-02-08 01:11:57,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:11:57,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 559 transitions, 11550 flow. Second operand has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:11:57,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:11:57,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:11:57,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:12:01,014 INFO L124 PetriNetUnfolderBase]: 8958/18434 cut-off events. [2025-02-08 01:12:01,014 INFO L125 PetriNetUnfolderBase]: For 286542/286864 co-relation queries the response was YES. [2025-02-08 01:12:01,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114224 conditions, 18434 events. 8958/18434 cut-off events. For 286542/286864 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 177094 event pairs, 1891 based on Foata normal form. 489/18795 useless extension candidates. Maximal degree in co-relation 114110. Up to 9954 conditions per place. [2025-02-08 01:12:01,153 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 377 selfloop transitions, 409 changer transitions 1/800 dead transitions. [2025-02-08 01:12:01,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 800 transitions, 17007 flow [2025-02-08 01:12:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-08 01:12:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-08 01:12:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 423 transitions. [2025-02-08 01:12:01,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4873271889400922 [2025-02-08 01:12:01,154 INFO L175 Difference]: Start difference. First operand has 247 places, 559 transitions, 11550 flow. Second operand 31 states and 423 transitions. [2025-02-08 01:12:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 800 transitions, 17007 flow [2025-02-08 01:12:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 800 transitions, 16361 flow, removed 52 selfloop flow, removed 21 redundant places. [2025-02-08 01:12:04,871 INFO L231 Difference]: Finished difference. Result has 262 places, 683 transitions, 14898 flow [2025-02-08 01:12:04,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=11061, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14898, PETRI_PLACES=262, PETRI_TRANSITIONS=683} [2025-02-08 01:12:04,872 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 236 predicate places. [2025-02-08 01:12:04,872 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 683 transitions, 14898 flow [2025-02-08 01:12:04,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:04,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:12:04,872 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:12:04,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-08 01:12:05,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:12:05,073 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:12:05,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:12:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1749401342, now seen corresponding path program 6 times [2025-02-08 01:12:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:12:05,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526438923] [2025-02-08 01:12:05,073 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:12:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:12:05,080 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:12:05,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:05,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:12:05,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:12:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:12:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526438923] [2025-02-08 01:12:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526438923] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:12:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768189215] [2025-02-08 01:12:05,400 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:12:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:12:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:12:05,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:12:05,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 01:12:05,452 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:12:05,470 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:05,470 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:12:05,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:05,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 01:12:05,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:12:05,659 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 01:12:05,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2025-02-08 01:12:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:05,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:12:05,731 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 01:12:05,731 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 40 treesize of output 56 [2025-02-08 01:12:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768189215] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:12:05,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:12:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2025-02-08 01:12:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675954716] [2025-02-08 01:12:05,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:12:05,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 01:12:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:12:05,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 01:12:05,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2025-02-08 01:12:05,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:12:05,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 683 transitions, 14898 flow. Second operand has 24 states, 24 states have (on average 9.416666666666666) internal successors, (226), 24 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:05,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:12:05,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:12:05,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:12:10,332 INFO L124 PetriNetUnfolderBase]: 9442/19516 cut-off events. [2025-02-08 01:12:10,332 INFO L125 PetriNetUnfolderBase]: For 369088/369352 co-relation queries the response was YES. [2025-02-08 01:12:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126521 conditions, 19516 events. 9442/19516 cut-off events. For 369088/369352 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 190033 event pairs, 2621 based on Foata normal form. 44/19424 useless extension candidates. Maximal degree in co-relation 126398. Up to 12778 conditions per place. [2025-02-08 01:12:10,536 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 523 selfloop transitions, 294 changer transitions 30/860 dead transitions. [2025-02-08 01:12:10,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 860 transitions, 18539 flow [2025-02-08 01:12:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 01:12:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-08 01:12:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 355 transitions. [2025-02-08 01:12:10,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4695767195767196 [2025-02-08 01:12:10,537 INFO L175 Difference]: Start difference. First operand has 262 places, 683 transitions, 14898 flow. Second operand 27 states and 355 transitions. [2025-02-08 01:12:10,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 860 transitions, 18539 flow [2025-02-08 01:12:15,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 860 transitions, 17747 flow, removed 180 selfloop flow, removed 12 redundant places. [2025-02-08 01:12:15,954 INFO L231 Difference]: Finished difference. Result has 290 places, 741 transitions, 16385 flow [2025-02-08 01:12:15,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14167, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=16385, PETRI_PLACES=290, PETRI_TRANSITIONS=741} [2025-02-08 01:12:15,954 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 264 predicate places. [2025-02-08 01:12:15,955 INFO L471 AbstractCegarLoop]: Abstraction has has 290 places, 741 transitions, 16385 flow [2025-02-08 01:12:15,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.416666666666666) internal successors, (226), 24 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:15,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:12:15,955 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:12:15,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-08 01:12:16,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-02-08 01:12:16,155 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:12:16,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:12:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1355769014, now seen corresponding path program 7 times [2025-02-08 01:12:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:12:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452941982] [2025-02-08 01:12:16,156 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:12:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:12:16,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:12:16,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:16,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:12:16,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:12:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:12:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452941982] [2025-02-08 01:12:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452941982] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:12:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035025444] [2025-02-08 01:12:16,452 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:12:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:12:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:12:16,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:12:16,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-08 01:12:16,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:12:16,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:16,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:12:16,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:16,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 01:12:16,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:12:16,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:12:16,599 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 37 treesize of output 25 [2025-02-08 01:12:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:16,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:12:16,665 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 01:12:16,665 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 40 treesize of output 56 [2025-02-08 01:12:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035025444] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:12:16,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:12:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2025-02-08 01:12:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429147001] [2025-02-08 01:12:16,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:12:16,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 01:12:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:12:16,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 01:12:16,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2025-02-08 01:12:16,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:12:16,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 741 transitions, 16385 flow. Second operand has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:16,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:12:16,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:12:16,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:12:21,582 INFO L124 PetriNetUnfolderBase]: 9479/19675 cut-off events. [2025-02-08 01:12:21,582 INFO L125 PetriNetUnfolderBase]: For 403237/403537 co-relation queries the response was YES. [2025-02-08 01:12:21,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129344 conditions, 19675 events. 9479/19675 cut-off events. For 403237/403537 co-relation queries the response was YES. Maximal size of possible extension queue 1249. Compared 193741 event pairs, 2563 based on Foata normal form. 62/19575 useless extension candidates. Maximal degree in co-relation 129208. Up to 13619 conditions per place. [2025-02-08 01:12:21,825 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 555 selfloop transitions, 278 changer transitions 18/864 dead transitions. [2025-02-08 01:12:21,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 864 transitions, 19259 flow [2025-02-08 01:12:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 01:12:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-08 01:12:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 369 transitions. [2025-02-08 01:12:21,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2025-02-08 01:12:21,827 INFO L175 Difference]: Start difference. First operand has 290 places, 741 transitions, 16385 flow. Second operand 27 states and 369 transitions. [2025-02-08 01:12:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 864 transitions, 19259 flow [2025-02-08 01:12:28,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 864 transitions, 18963 flow, removed 112 selfloop flow, removed 9 redundant places. [2025-02-08 01:12:28,484 INFO L231 Difference]: Finished difference. Result has 314 places, 760 transitions, 17236 flow [2025-02-08 01:12:28,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=16139, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17236, PETRI_PLACES=314, PETRI_TRANSITIONS=760} [2025-02-08 01:12:28,485 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 288 predicate places. [2025-02-08 01:12:28,485 INFO L471 AbstractCegarLoop]: Abstraction has has 314 places, 760 transitions, 17236 flow [2025-02-08 01:12:28,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:28,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:12:28,485 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:12:28,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-08 01:12:28,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-02-08 01:12:28,686 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:12:28,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:12:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1226609418, now seen corresponding path program 8 times [2025-02-08 01:12:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:12:28,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729824230] [2025-02-08 01:12:28,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:12:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:12:28,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:12:28,702 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:28,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:12:28,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:12:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729824230] [2025-02-08 01:12:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729824230] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:12:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796308954] [2025-02-08 01:12:28,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:12:28,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:12:28,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:12:28,865 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:12:28,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-08 01:12:28,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 01:12:28,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:28,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:12:28,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:28,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-08 01:12:28,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:12:29,007 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 [2025-02-08 01:12:29,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:12:29,096 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 29 treesize of output 21 [2025-02-08 01:12:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:12:29,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:12:29,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:12:29,298 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 168 treesize of output 164 [2025-02-08 01:12:29,337 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:12:29,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 39 [2025-02-08 01:12:29,369 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-02-08 01:12:29,369 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 199 treesize of output 194 [2025-02-08 01:12:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:12:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796308954] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:12:29,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:12:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 22 [2025-02-08 01:12:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127150726] [2025-02-08 01:12:29,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:12:29,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 01:12:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:12:29,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 01:12:29,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2025-02-08 01:12:29,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:12:29,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 760 transitions, 17236 flow. Second operand has 23 states, 23 states have (on average 9.08695652173913) internal successors, (209), 23 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:29,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:12:29,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:12:29,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:12:33,936 INFO L124 PetriNetUnfolderBase]: 9205/19044 cut-off events. [2025-02-08 01:12:33,936 INFO L125 PetriNetUnfolderBase]: For 436668/436950 co-relation queries the response was YES. [2025-02-08 01:12:34,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128803 conditions, 19044 events. 9205/19044 cut-off events. For 436668/436950 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 184265 event pairs, 2711 based on Foata normal form. 138/19014 useless extension candidates. Maximal degree in co-relation 128661. Up to 14803 conditions per place. [2025-02-08 01:12:34,349 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 594 selfloop transitions, 270 changer transitions 1/878 dead transitions. [2025-02-08 01:12:34,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 878 transitions, 21021 flow [2025-02-08 01:12:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 01:12:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-08 01:12:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 249 transitions. [2025-02-08 01:12:34,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4680451127819549 [2025-02-08 01:12:34,350 INFO L175 Difference]: Start difference. First operand has 314 places, 760 transitions, 17236 flow. Second operand 19 states and 249 transitions. [2025-02-08 01:12:34,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 878 transitions, 21021 flow [2025-02-08 01:12:39,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 878 transitions, 20637 flow, removed 105 selfloop flow, removed 13 redundant places. [2025-02-08 01:12:39,719 INFO L231 Difference]: Finished difference. Result has 320 places, 813 transitions, 19247 flow [2025-02-08 01:12:39,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=16905, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19247, PETRI_PLACES=320, PETRI_TRANSITIONS=813} [2025-02-08 01:12:39,720 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 294 predicate places. [2025-02-08 01:12:39,720 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 813 transitions, 19247 flow [2025-02-08 01:12:39,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.08695652173913) internal successors, (209), 23 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:39,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:12:39,720 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:12:39,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-08 01:12:39,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-02-08 01:12:39,920 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:12:39,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:12:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2062100854, now seen corresponding path program 1 times [2025-02-08 01:12:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:12:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972826101] [2025-02-08 01:12:39,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:12:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:12:39,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:12:39,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:39,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:12:39,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:12:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:12:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972826101] [2025-02-08 01:12:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972826101] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:12:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315649390] [2025-02-08 01:12:40,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:12:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:12:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:12:40,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:12:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-08 01:12:40,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 01:12:40,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 01:12:40,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:12:40,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:12:40,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 01:12:40,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:12:40,333 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-02-08 01:12:40,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2025-02-08 01:12:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:40,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:12:40,409 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2025-02-08 01:12:40,409 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 42 treesize of output 60 [2025-02-08 01:12:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:12:40,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315649390] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:12:40,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:12:40,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2025-02-08 01:12:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116156335] [2025-02-08 01:12:40,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:12:40,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 01:12:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:12:40,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 01:12:40,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2025-02-08 01:12:40,511 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-02-08 01:12:40,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 813 transitions, 19247 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:12:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:12:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-02-08 01:12:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand