./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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/chl-chromosome-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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:33:14,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:33:14,826 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:33:14,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:33:14,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:33:14,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:33:14,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:33:14,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:33:14,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:33:14,857 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:33:14,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:33:14,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:33:14,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:33:14,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:33:14,858 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:33:14,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:33:14,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:33:14,858 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:33:14,859 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:33:14,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:33:14,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:33:14,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:33:14,860 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 -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2025-02-06 04:33:15,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:33:15,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:33:15,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:33:15,085 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:33:15,085 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:33:15,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-02-06 04:33:16,293 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcb9b6d56/9668aca1c57d49e1a79f7c285405173a/FLAG40cec8820 [2025-02-06 04:33:16,531 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:33:16,532 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2025-02-06 04:33:16,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcb9b6d56/9668aca1c57d49e1a79f7c285405173a/FLAG40cec8820 [2025-02-06 04:33:16,848 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcb9b6d56/9668aca1c57d49e1a79f7c285405173a [2025-02-06 04:33:16,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:33:16,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:33:16,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:33:16,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:33:16,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:33:16,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:33:16" (1/1) ... [2025-02-06 04:33:16,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4778c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:16, skipping insertion in model container [2025-02-06 04:33:16,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:33:16" (1/1) ... [2025-02-06 04:33:16,872 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:33:16,992 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/chl-chromosome-symm.wvr.c[2721,2734] [2025-02-06 04:33:17,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:33:17,013 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:33:17,030 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/chl-chromosome-symm.wvr.c[2721,2734] [2025-02-06 04:33:17,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:33:17,049 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:33:17,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17 WrapperNode [2025-02-06 04:33:17,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:33:17,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:33:17,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:33:17,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:33:17,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,087 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 179 [2025-02-06 04:33:17,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:33:17,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:33:17,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:33:17,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:33:17,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,097 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,112 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]. [2025-02-06 04:33:17,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,122 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:33:17,126 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:33:17,126 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:33:17,126 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:33:17,127 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (1/1) ... [2025-02-06 04:33:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:33:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:17,152 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) [2025-02-06 04:33:17,154 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 [2025-02-06 04:33:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:33:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:33:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:33:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:33:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:33:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:33:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:33:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:33:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:33:17,174 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:33:17,253 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:33:17,254 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:33:17,485 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:33:17,486 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:33:17,691 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:33:17,692 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:33:17,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:33:17 BoogieIcfgContainer [2025-02-06 04:33:17,692 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:33:17,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:33:17,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:33:17,697 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:33:17,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:33:16" (1/3) ... [2025-02-06 04:33:17,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1276db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:33:17, skipping insertion in model container [2025-02-06 04:33:17,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:33:17" (2/3) ... [2025-02-06 04:33:17,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1276db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:33:17, skipping insertion in model container [2025-02-06 04:33:17,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:33:17" (3/3) ... [2025-02-06 04:33:17,700 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2025-02-06 04:33:17,710 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:33:17,712 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-symm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-06 04:33:17,712 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:33:17,753 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:33:17,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2025-02-06 04:33:17,795 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2025-02-06 04:33:17,796 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:33:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2025-02-06 04:33:17,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2025-02-06 04:33:17,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2025-02-06 04:33:17,811 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:33:17,819 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;@300a47f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:33:17,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:33:17,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:33:17,847 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2025-02-06 04:33:17,847 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:33:17,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:17,847 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:17,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:17,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -640687221, now seen corresponding path program 1 times [2025-02-06 04:33:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949238674] [2025-02-06 04:33:17,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:17,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:33:17,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:33:17,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:17,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:33:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949238674] [2025-02-06 04:33:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949238674] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:18,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:18,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:33:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340996140] [2025-02-06 04:33:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:18,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:33:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:18,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:33:18,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:33:18,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:18,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:18,253 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2025-02-06 04:33:18,254 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-02-06 04:33:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2025-02-06 04:33:18,255 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2025-02-06 04:33:18,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2025-02-06 04:33:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:33:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:33:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2025-02-06 04:33:18,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2025-02-06 04:33:18,264 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2025-02-06 04:33:18,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2025-02-06 04:33:18,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:33:18,269 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2025-02-06 04:33:18,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2025-02-06 04:33:18,273 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2025-02-06 04:33:18,275 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2025-02-06 04:33:18,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:18,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:18,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:18,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:33:18,276 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:18,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -449448040, now seen corresponding path program 1 times [2025-02-06 04:33:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:18,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716899807] [2025-02-06 04:33:18,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:18,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 04:33:18,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:33:18,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:18,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:33:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716899807] [2025-02-06 04:33:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716899807] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461795290] [2025-02-06 04:33:18,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:18,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:18,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:18,417 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) [2025-02-06 04:33:18,419 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 [2025-02-06 04:33:18,473 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 04:33:18,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:33:18,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:18,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:18,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:33:18,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:33:18,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:33:18,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461795290] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:18,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-02-06 04:33:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856924407] [2025-02-06 04:33:18,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:18,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:33:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:18,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:33:18,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:33:18,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:18,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:18,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:18,651 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2025-02-06 04:33:18,651 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:33:18,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2025-02-06 04:33:18,652 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2025-02-06 04:33:18,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2025-02-06 04:33:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:33:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:33:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2025-02-06 04:33:18,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2025-02-06 04:33:18,653 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2025-02-06 04:33:18,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2025-02-06 04:33:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:18,654 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2025-02-06 04:33:18,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2025-02-06 04:33:18,655 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2025-02-06 04:33:18,655 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2025-02-06 04:33:18,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:18,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:18,655 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:18,662 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 [2025-02-06 04:33:18,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:18,856 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:18,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1344505715, now seen corresponding path program 2 times [2025-02-06 04:33:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:18,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32997350] [2025-02-06 04:33:18,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:18,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:33:18,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-02-06 04:33:18,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:33:18,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-06 04:33:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32997350] [2025-02-06 04:33:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32997350] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:19,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279988892] [2025-02-06 04:33:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:19,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:19,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:19,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:19,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:19,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:19,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:19,116 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2025-02-06 04:33:19,116 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:33:19,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2025-02-06 04:33:19,117 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2025-02-06 04:33:19,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2025-02-06 04:33:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2025-02-06 04:33:19,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-02-06 04:33:19,118 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2025-02-06 04:33:19,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2025-02-06 04:33:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:19,120 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2025-02-06 04:33:19,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2025-02-06 04:33:19,122 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2025-02-06 04:33:19,122 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2025-02-06 04:33:19,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:19,122 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:19,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:33:19,122 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:19,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1305307343, now seen corresponding path program 3 times [2025-02-06 04:33:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709941935] [2025-02-06 04:33:19,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:19,133 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 04:33:19,145 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-02-06 04:33:19,145 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:33:19,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-06 04:33:19,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:19,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709941935] [2025-02-06 04:33:19,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709941935] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:19,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:19,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733112563] [2025-02-06 04:33:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:19,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:19,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:19,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:19,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:19,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:19,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:19,356 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2025-02-06 04:33:19,356 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-06 04:33:19,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 516 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2025-02-06 04:33:19,361 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2025-02-06 04:33:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2025-02-06 04:33:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-02-06 04:33:19,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 04:33:19,362 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2025-02-06 04:33:19,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2025-02-06 04:33:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:19,364 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2025-02-06 04:33:19,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-02-06 04:33:19,364 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2025-02-06 04:33:19,364 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2025-02-06 04:33:19,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:19,364 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:19,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:33:19,364 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:19,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2079020195, now seen corresponding path program 4 times [2025-02-06 04:33:19,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:19,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635382575] [2025-02-06 04:33:19,365 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:19,377 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:33:19,390 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:33:19,390 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:19,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:33:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635382575] [2025-02-06 04:33:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635382575] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484186127] [2025-02-06 04:33:19,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:19,526 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) [2025-02-06 04:33:19,528 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 [2025-02-06 04:33:19,582 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 04:33:19,608 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:33:19,608 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:19,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:19,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 04:33:19,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:33:19,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:33:19,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484186127] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:19,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:19,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 04:33:19,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927072691] [2025-02-06 04:33:19,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:19,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:33:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:19,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:33:19,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:33:19,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:19,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:19,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:19,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:19,868 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2025-02-06 04:33:19,870 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-02-06 04:33:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 508 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2025-02-06 04:33:19,873 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2025-02-06 04:33:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2025-02-06 04:33:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 04:33:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 04:33:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2025-02-06 04:33:19,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2025-02-06 04:33:19,875 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2025-02-06 04:33:19,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2025-02-06 04:33:19,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:19,876 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2025-02-06 04:33:19,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2025-02-06 04:33:19,877 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2025-02-06 04:33:19,877 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2025-02-06 04:33:19,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:19,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:19,877 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:19,884 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 [2025-02-06 04:33:20,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:20,082 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:20,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash -517548544, now seen corresponding path program 5 times [2025-02-06 04:33:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341025439] [2025-02-06 04:33:20,083 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:20,093 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 4 equivalence classes. [2025-02-06 04:33:20,106 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 04:33:20,106 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 04:33:20,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:20,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341025439] [2025-02-06 04:33:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341025439] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:20,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:20,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146743255] [2025-02-06 04:33:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:20,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:20,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:20,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:20,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:20,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:20,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:20,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:20,304 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2025-02-06 04:33:20,304 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-02-06 04:33:20,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 624 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2025-02-06 04:33:20,306 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2025-02-06 04:33:20,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2025-02-06 04:33:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2025-02-06 04:33:20,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-02-06 04:33:20,307 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2025-02-06 04:33:20,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2025-02-06 04:33:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 04:33:20,309 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2025-02-06 04:33:20,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2025-02-06 04:33:20,309 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2025-02-06 04:33:20,309 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2025-02-06 04:33:20,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:20,309 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:20,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:33:20,310 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:20,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash -162157616, now seen corresponding path program 6 times [2025-02-06 04:33:20,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:20,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249763833] [2025-02-06 04:33:20,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:20,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:20,319 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 4 equivalence classes. [2025-02-06 04:33:20,325 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 15 of 25 statements. [2025-02-06 04:33:20,325 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-06 04:33:20,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249763833] [2025-02-06 04:33:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249763833] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:20,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:20,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390493590] [2025-02-06 04:33:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:20,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:20,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:20,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:20,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:20,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:20,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:20,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:20,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:20,486 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2025-02-06 04:33:20,487 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2025-02-06 04:33:20,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 454 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2025-02-06 04:33:20,490 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2025-02-06 04:33:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2025-02-06 04:33:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-02-06 04:33:20,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-02-06 04:33:20,491 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2025-02-06 04:33:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2025-02-06 04:33:20,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:20,495 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2025-02-06 04:33:20,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2025-02-06 04:33:20,497 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-02-06 04:33:20,497 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2025-02-06 04:33:20,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:20,498 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:20,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 04:33:20,498 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:20,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 759142737, now seen corresponding path program 1 times [2025-02-06 04:33:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:20,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057443102] [2025-02-06 04:33:20,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:20,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 04:33:20,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 04:33:20,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:20,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:20,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:20,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057443102] [2025-02-06 04:33:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057443102] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601415057] [2025-02-06 04:33:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:20,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:20,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:20,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:20,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:20,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:20,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:20,736 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2025-02-06 04:33:20,736 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2025-02-06 04:33:20,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 437 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2025-02-06 04:33:20,738 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-02-06 04:33:20,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2025-02-06 04:33:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-02-06 04:33:20,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2025-02-06 04:33:20,738 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2025-02-06 04:33:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2025-02-06 04:33:20,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 04:33:20,741 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2025-02-06 04:33:20,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2025-02-06 04:33:20,741 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-02-06 04:33:20,741 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2025-02-06 04:33:20,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:20,742 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:20,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 04:33:20,742 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:20,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash -287282197, now seen corresponding path program 2 times [2025-02-06 04:33:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:20,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081377812] [2025-02-06 04:33:20,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:20,751 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 04:33:20,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 26 statements. [2025-02-06 04:33:20,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:33:20,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:20,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081377812] [2025-02-06 04:33:20,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081377812] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:33:20,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:33:20,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:33:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153165941] [2025-02-06 04:33:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:33:20,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:33:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:20,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:33:20,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:33:20,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:20,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:20,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:20,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:20,917 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2025-02-06 04:33:20,919 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2025-02-06 04:33:20,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 363 event pairs, 25 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2025-02-06 04:33:20,920 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2025-02-06 04:33:20,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2025-02-06 04:33:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:33:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:33:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-02-06 04:33:20,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2025-02-06 04:33:20,921 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2025-02-06 04:33:20,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2025-02-06 04:33:20,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-06 04:33:20,923 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2025-02-06 04:33:20,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2025-02-06 04:33:20,923 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2025-02-06 04:33:20,923 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2025-02-06 04:33:20,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:20,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:20,923 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:20,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 04:33:20,923 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:20,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash -117076279, now seen corresponding path program 1 times [2025-02-06 04:33:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:20,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604295536] [2025-02-06 04:33:20,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:20,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:20,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:33:21,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:21,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:21,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604295536] [2025-02-06 04:33:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604295536] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:21,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711336967] [2025-02-06 04:33:21,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:33:21,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:21,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:21,640 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) [2025-02-06 04:33:21,642 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 [2025-02-06 04:33:21,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:33:21,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:21,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:21,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:21,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:33:21,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:21,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:21,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-02-06 04:33:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:21,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:22,294 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:22,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2025-02-06 04:33:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:22,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711336967] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:22,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:22,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-06 04:33:22,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029953616] [2025-02-06 04:33:22,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:22,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:22,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:22,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:22,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:22,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:22,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:22,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:22,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:22,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:22,861 INFO L124 PetriNetUnfolderBase]: 139/258 cut-off events. [2025-02-06 04:33:22,862 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2025-02-06 04:33:22,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 258 events. 139/258 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 788 event pairs, 12 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 863. Up to 99 conditions per place. [2025-02-06 04:33:22,863 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 55 selfloop transitions, 20 changer transitions 3/79 dead transitions. [2025-02-06 04:33:22,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 584 flow [2025-02-06 04:33:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:33:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:33:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2025-02-06 04:33:22,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2025-02-06 04:33:22,865 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 12 states and 96 transitions. [2025-02-06 04:33:22,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 584 flow [2025-02-06 04:33:22,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 550 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 04:33:22,867 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 372 flow [2025-02-06 04:33:22,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2025-02-06 04:33:22,868 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-02-06 04:33:22,868 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 372 flow [2025-02-06 04:33:22,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:22,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:22,868 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:22,874 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 [2025-02-06 04:33:23,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:23,069 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:23,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1010107613, now seen corresponding path program 2 times [2025-02-06 04:33:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090450394] [2025-02-06 04:33:23,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:23,078 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:23,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:23,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:23,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:23,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090450394] [2025-02-06 04:33:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090450394] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627182156] [2025-02-06 04:33:23,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:23,644 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) [2025-02-06 04:33:23,646 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 [2025-02-06 04:33:23,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:23,730 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:23,730 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:23,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:23,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:33:23,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:23,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:23,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-02-06 04:33:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:23,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:24,179 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:33:24,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:33:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627182156] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:24,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2025-02-06 04:33:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512411489] [2025-02-06 04:33:24,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:24,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:24,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:24,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:24,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:24,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 372 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:24,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:24,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:24,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:24,630 INFO L124 PetriNetUnfolderBase]: 159/293 cut-off events. [2025-02-06 04:33:24,630 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2025-02-06 04:33:24,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 293 events. 159/293 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 946 event pairs, 26 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1095. Up to 218 conditions per place. [2025-02-06 04:33:24,632 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 50 selfloop transitions, 23 changer transitions 3/77 dead transitions. [2025-02-06 04:33:24,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 640 flow [2025-02-06 04:33:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:33:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:33:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-02-06 04:33:24,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-02-06 04:33:24,635 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 372 flow. Second operand 13 states and 91 transitions. [2025-02-06 04:33:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 640 flow [2025-02-06 04:33:24,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 611 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-02-06 04:33:24,639 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 478 flow [2025-02-06 04:33:24,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2025-02-06 04:33:24,640 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2025-02-06 04:33:24,640 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 478 flow [2025-02-06 04:33:24,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:24,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:24,640 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:24,646 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 [2025-02-06 04:33:24,844 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,SelfDestructingSolverStorable10 [2025-02-06 04:33:24,844 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:24,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1797758173, now seen corresponding path program 3 times [2025-02-06 04:33:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132108714] [2025-02-06 04:33:24,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:24,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 04:33:24,878 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-02-06 04:33:24,878 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:24,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:25,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132108714] [2025-02-06 04:33:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132108714] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351821985] [2025-02-06 04:33:25,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:25,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:25,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:25,235 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) [2025-02-06 04:33:25,236 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 [2025-02-06 04:33:25,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 04:33:25,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 27 statements. [2025-02-06 04:33:25,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:25,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:25,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:33:25,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:25,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:25,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-02-06 04:33:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:25,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:25,769 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:33:25,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:33:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351821985] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:25,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:25,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2025-02-06 04:33:25,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876832387] [2025-02-06 04:33:25,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:25,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:25,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:25,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:25,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:25,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 478 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:25,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:25,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:25,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:26,266 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2025-02-06 04:33:26,266 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2025-02-06 04:33:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 318 events. 173/318 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1073 event pairs, 25 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 1348. Up to 234 conditions per place. [2025-02-06 04:33:26,270 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 56 selfloop transitions, 25 changer transitions 2/84 dead transitions. [2025-02-06 04:33:26,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 769 flow [2025-02-06 04:33:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:33:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:33:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-02-06 04:33:26,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 04:33:26,271 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 478 flow. Second operand 12 states and 88 transitions. [2025-02-06 04:33:26,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 769 flow [2025-02-06 04:33:26,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 718 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-02-06 04:33:26,277 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 568 flow [2025-02-06 04:33:26,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=568, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2025-02-06 04:33:26,278 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 61 predicate places. [2025-02-06 04:33:26,279 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 568 flow [2025-02-06 04:33:26,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:26,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:26,279 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:26,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 04:33:26,480 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,SelfDestructingSolverStorable11 [2025-02-06 04:33:26,480 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:26,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -784502227, now seen corresponding path program 4 times [2025-02-06 04:33:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:26,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611429743] [2025-02-06 04:33:26,480 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:26,487 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:26,510 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:26,511 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:26,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611429743] [2025-02-06 04:33:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611429743] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204452000] [2025-02-06 04:33:27,015 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:27,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:27,017 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) [2025-02-06 04:33:27,018 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 [2025-02-06 04:33:27,078 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:27,104 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:27,104 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:27,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:27,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:33:27,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:27,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:27,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-02-06 04:33:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:27,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:27,542 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:33:27,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:33:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:27,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204452000] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:27,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:27,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-06 04:33:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133434469] [2025-02-06 04:33:27,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:27,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:27,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:27,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:27,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:27,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 568 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:27,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:27,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:27,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:28,123 INFO L124 PetriNetUnfolderBase]: 175/326 cut-off events. [2025-02-06 04:33:28,123 INFO L125 PetriNetUnfolderBase]: For 1183/1183 co-relation queries the response was YES. [2025-02-06 04:33:28,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 326 events. 175/326 cut-off events. For 1183/1183 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1127 event pairs, 23 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1519. Up to 240 conditions per place. [2025-02-06 04:33:28,126 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 57 selfloop transitions, 24 changer transitions 4/86 dead transitions. [2025-02-06 04:33:28,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 824 flow [2025-02-06 04:33:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:33:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:33:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-02-06 04:33:28,127 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-02-06 04:33:28,127 INFO L175 Difference]: Start difference. First operand has 83 places, 67 transitions, 568 flow. Second operand 13 states and 91 transitions. [2025-02-06 04:33:28,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 824 flow [2025-02-06 04:33:28,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 763 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-02-06 04:33:28,133 INFO L231 Difference]: Finished difference. Result has 89 places, 68 transitions, 572 flow [2025-02-06 04:33:28,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2025-02-06 04:33:28,134 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 67 predicate places. [2025-02-06 04:33:28,134 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 572 flow [2025-02-06 04:33:28,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:28,135 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:28,135 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:28,140 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 [2025-02-06 04:33:28,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 04:33:28,337 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:28,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash 938288997, now seen corresponding path program 5 times [2025-02-06 04:33:28,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:28,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010485549] [2025-02-06 04:33:28,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:28,346 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-02-06 04:33:28,391 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:28,391 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:28,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:33:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:29,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010485549] [2025-02-06 04:33:29,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010485549] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:29,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598731289] [2025-02-06 04:33:29,183 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:29,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:29,185 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) [2025-02-06 04:33:29,187 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 [2025-02-06 04:33:29,249 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 5 equivalence classes. [2025-02-06 04:33:29,373 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:29,374 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:29,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:29,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-06 04:33:29,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:29,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:29,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-02-06 04:33:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:29,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:29,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:29,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2025-02-06 04:33:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:30,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598731289] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:30,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:30,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2025-02-06 04:33:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685145233] [2025-02-06 04:33:30,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:30,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 04:33:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:30,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 04:33:30,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2025-02-06 04:33:30,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:30,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 572 flow. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:30,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:30,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:30,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:30,977 INFO L124 PetriNetUnfolderBase]: 205/407 cut-off events. [2025-02-06 04:33:30,978 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2025-02-06 04:33:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 407 events. 205/407 cut-off events. For 1427/1427 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1586 event pairs, 63 based on Foata normal form. 5/386 useless extension candidates. Maximal degree in co-relation 1856. Up to 246 conditions per place. [2025-02-06 04:33:30,980 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 70 selfloop transitions, 36 changer transitions 12/119 dead transitions. [2025-02-06 04:33:30,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 1098 flow [2025-02-06 04:33:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:33:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:33:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2025-02-06 04:33:30,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35406698564593303 [2025-02-06 04:33:30,982 INFO L175 Difference]: Start difference. First operand has 89 places, 68 transitions, 572 flow. Second operand 19 states and 148 transitions. [2025-02-06 04:33:30,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 1098 flow [2025-02-06 04:33:30,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 1044 flow, removed 2 selfloop flow, removed 12 redundant places. [2025-02-06 04:33:30,988 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 703 flow [2025-02-06 04:33:30,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=703, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2025-02-06 04:33:30,990 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2025-02-06 04:33:30,990 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 703 flow [2025-02-06 04:33:30,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:30,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:30,990 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:30,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 04:33:31,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:31,190 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:31,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1420573557, now seen corresponding path program 6 times [2025-02-06 04:33:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298418160] [2025-02-06 04:33:31,193 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:31,202 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-02-06 04:33:31,215 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-02-06 04:33:31,215 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:31,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298418160] [2025-02-06 04:33:31,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298418160] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921839537] [2025-02-06 04:33:31,607 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:31,608 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) [2025-02-06 04:33:31,610 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 [2025-02-06 04:33:31,673 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-02-06 04:33:31,694 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 27 statements. [2025-02-06 04:33:31,694 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:31,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:31,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:33:31,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:31,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:31,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-02-06 04:33:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:31,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:32,072 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:33:32,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:33:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:32,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921839537] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:32,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:32,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-06 04:33:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767527940] [2025-02-06 04:33:32,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:32,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:32,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:32,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:32,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:32,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 703 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:32,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:32,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:32,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:32,633 INFO L124 PetriNetUnfolderBase]: 217/423 cut-off events. [2025-02-06 04:33:32,634 INFO L125 PetriNetUnfolderBase]: For 3406/3406 co-relation queries the response was YES. [2025-02-06 04:33:32,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 423 events. 217/423 cut-off events. For 3406/3406 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1649 event pairs, 62 based on Foata normal form. 2/425 useless extension candidates. Maximal degree in co-relation 2368. Up to 309 conditions per place. [2025-02-06 04:33:32,637 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 70 selfloop transitions, 26 changer transitions 4/101 dead transitions. [2025-02-06 04:33:32,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 1123 flow [2025-02-06 04:33:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:33:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:33:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-02-06 04:33:32,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-02-06 04:33:32,639 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 703 flow. Second operand 13 states and 91 transitions. [2025-02-06 04:33:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 1123 flow [2025-02-06 04:33:32,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 986 flow, removed 47 selfloop flow, removed 13 redundant places. [2025-02-06 04:33:32,648 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 754 flow [2025-02-06 04:33:32,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=754, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2025-02-06 04:33:32,649 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 77 predicate places. [2025-02-06 04:33:32,649 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 754 flow [2025-02-06 04:33:32,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:32,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:32,651 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:32,657 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 [2025-02-06 04:33:32,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-06 04:33:32,855 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:32,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1145346405, now seen corresponding path program 7 times [2025-02-06 04:33:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479241839] [2025-02-06 04:33:32,856 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:32,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:33:32,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:32,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:32,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:33:33,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479241839] [2025-02-06 04:33:33,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479241839] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225391392] [2025-02-06 04:33:33,781 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:33,783 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) [2025-02-06 04:33:33,784 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 [2025-02-06 04:33:33,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:33:33,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:33,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:33,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:33,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:33:33,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:33,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:33,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-02-06 04:33:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:33,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:34,278 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:33:34,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:33:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225391392] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:34,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 29 [2025-02-06 04:33:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647329120] [2025-02-06 04:33:34,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:34,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 04:33:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:34,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 04:33:34,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-02-06 04:33:34,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:34,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 754 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:34,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:34,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:35,086 INFO L124 PetriNetUnfolderBase]: 235/459 cut-off events. [2025-02-06 04:33:35,086 INFO L125 PetriNetUnfolderBase]: For 3819/3819 co-relation queries the response was YES. [2025-02-06 04:33:35,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 459 events. 235/459 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1873 event pairs, 67 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2586. Up to 348 conditions per place. [2025-02-06 04:33:35,090 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 67 selfloop transitions, 36 changer transitions 3/107 dead transitions. [2025-02-06 04:33:35,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 1156 flow [2025-02-06 04:33:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 04:33:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 04:33:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 116 transitions. [2025-02-06 04:33:35,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29292929292929293 [2025-02-06 04:33:35,092 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 754 flow. Second operand 18 states and 116 transitions. [2025-02-06 04:33:35,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 1156 flow [2025-02-06 04:33:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 1111 flow, removed 16 selfloop flow, removed 6 redundant places. [2025-02-06 04:33:35,099 INFO L231 Difference]: Finished difference. Result has 112 places, 89 transitions, 887 flow [2025-02-06 04:33:35,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=89} [2025-02-06 04:33:35,100 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2025-02-06 04:33:35,101 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 89 transitions, 887 flow [2025-02-06 04:33:35,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:35,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:35,101 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:35,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 04:33:35,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:35,302 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:35,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1644982595, now seen corresponding path program 8 times [2025-02-06 04:33:35,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:35,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013873272] [2025-02-06 04:33:35,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:35,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:35,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:35,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:35,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:35,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:35,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013873272] [2025-02-06 04:33:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013873272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474744580] [2025-02-06 04:33:35,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:35,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:35,695 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) [2025-02-06 04:33:35,697 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 [2025-02-06 04:33:35,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 04:33:35,789 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:33:35,790 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:35,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:35,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:33:35,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:35,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:35,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-02-06 04:33:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:35,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:36,146 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:36,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2025-02-06 04:33:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474744580] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:36,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-06 04:33:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408756635] [2025-02-06 04:33:36,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:36,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:36,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:36,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:36,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:36,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 89 transitions, 887 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:36,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:36,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:36,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:36,598 INFO L124 PetriNetUnfolderBase]: 275/531 cut-off events. [2025-02-06 04:33:36,598 INFO L125 PetriNetUnfolderBase]: For 5253/5253 co-relation queries the response was YES. [2025-02-06 04:33:36,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3330 conditions, 531 events. 275/531 cut-off events. For 5253/5253 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2274 event pairs, 45 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 3231. Up to 215 conditions per place. [2025-02-06 04:33:36,602 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2025-02-06 04:33:36,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 1429 flow [2025-02-06 04:33:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:33:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:33:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2025-02-06 04:33:36,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2025-02-06 04:33:36,603 INFO L175 Difference]: Start difference. First operand has 112 places, 89 transitions, 887 flow. Second operand 12 states and 90 transitions. [2025-02-06 04:33:36,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 1429 flow [2025-02-06 04:33:36,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 118 transitions, 1334 flow, removed 18 selfloop flow, removed 15 redundant places. [2025-02-06 04:33:36,612 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 1048 flow [2025-02-06 04:33:36,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2025-02-06 04:33:36,613 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2025-02-06 04:33:36,613 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 1048 flow [2025-02-06 04:33:36,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:36,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:36,613 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:36,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 04:33:36,814 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,SelfDestructingSolverStorable16 [2025-02-06 04:33:36,814 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:36,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash -536552746, now seen corresponding path program 9 times [2025-02-06 04:33:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:36,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77142153] [2025-02-06 04:33:36,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:36,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:36,823 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:36,834 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:36,835 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:36,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77142153] [2025-02-06 04:33:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77142153] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354559788] [2025-02-06 04:33:37,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:37,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:37,116 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) [2025-02-06 04:33:37,118 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 [2025-02-06 04:33:37,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:37,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:37,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:37,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:37,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:33:37,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:37,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:37,387 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:37,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:33:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354559788] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:37,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:33:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73422914] [2025-02-06 04:33:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:37,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:33:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:37,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:33:37,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:33:37,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:37,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 1048 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:37,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:37,706 INFO L124 PetriNetUnfolderBase]: 289/555 cut-off events. [2025-02-06 04:33:37,706 INFO L125 PetriNetUnfolderBase]: For 6221/6221 co-relation queries the response was YES. [2025-02-06 04:33:37,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 555 events. 289/555 cut-off events. For 6221/6221 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2410 event pairs, 45 based on Foata normal form. 5/560 useless extension candidates. Maximal degree in co-relation 3614. Up to 262 conditions per place. [2025-02-06 04:33:37,710 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2025-02-06 04:33:37,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 1604 flow [2025-02-06 04:33:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:33:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:33:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2025-02-06 04:33:37,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-02-06 04:33:37,711 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 1048 flow. Second operand 10 states and 84 transitions. [2025-02-06 04:33:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 1604 flow [2025-02-06 04:33:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 1540 flow, removed 20 selfloop flow, removed 6 redundant places. [2025-02-06 04:33:37,723 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 1105 flow [2025-02-06 04:33:37,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1105, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2025-02-06 04:33:37,723 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 95 predicate places. [2025-02-06 04:33:37,723 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 1105 flow [2025-02-06 04:33:37,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:37,723 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:37,723 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:37,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 04:33:37,924 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,SelfDestructingSolverStorable17 [2025-02-06 04:33:37,924 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:37,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1285245635, now seen corresponding path program 10 times [2025-02-06 04:33:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719096180] [2025-02-06 04:33:37,925 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:37,934 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:37,954 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:37,954 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:37,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719096180] [2025-02-06 04:33:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719096180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399993709] [2025-02-06 04:33:38,283 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:38,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:38,285 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) [2025-02-06 04:33:38,286 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 [2025-02-06 04:33:38,355 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:38,379 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:38,379 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:38,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:38,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-06 04:33:38,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:38,483 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-02-06 04:33:38,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 31 [2025-02-06 04:33:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:38,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:38,664 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:33:38,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:33:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:38,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399993709] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:38,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:38,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2025-02-06 04:33:38,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423484376] [2025-02-06 04:33:38,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:38,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:33:38,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:38,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:33:38,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:33:38,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:38,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 1105 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:38,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:38,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:38,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:39,036 INFO L124 PetriNetUnfolderBase]: 292/568 cut-off events. [2025-02-06 04:33:39,036 INFO L125 PetriNetUnfolderBase]: For 6616/6616 co-relation queries the response was YES. [2025-02-06 04:33:39,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3841 conditions, 568 events. 292/568 cut-off events. For 6616/6616 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2587 event pairs, 25 based on Foata normal form. 3/571 useless extension candidates. Maximal degree in co-relation 3753. Up to 213 conditions per place. [2025-02-06 04:33:39,040 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 36 changer transitions 13/139 dead transitions. [2025-02-06 04:33:39,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 139 transitions, 1747 flow [2025-02-06 04:33:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:33:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:33:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2025-02-06 04:33:39,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2025-02-06 04:33:39,041 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 1105 flow. Second operand 10 states and 85 transitions. [2025-02-06 04:33:39,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 139 transitions, 1747 flow [2025-02-06 04:33:39,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 139 transitions, 1636 flow, removed 13 selfloop flow, removed 8 redundant places. [2025-02-06 04:33:39,052 INFO L231 Difference]: Finished difference. Result has 122 places, 100 transitions, 1124 flow [2025-02-06 04:33:39,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1124, PETRI_PLACES=122, PETRI_TRANSITIONS=100} [2025-02-06 04:33:39,053 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 100 predicate places. [2025-02-06 04:33:39,053 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 100 transitions, 1124 flow [2025-02-06 04:33:39,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:39,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:39,053 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:39,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 04:33:39,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:39,255 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:39,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 952067775, now seen corresponding path program 11 times [2025-02-06 04:33:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675035118] [2025-02-06 04:33:39,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:39,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:39,264 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:39,288 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:39,288 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:39,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 04:33:39,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675035118] [2025-02-06 04:33:39,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675035118] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528130589] [2025-02-06 04:33:39,976 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:39,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:39,978 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) [2025-02-06 04:33:39,978 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 [2025-02-06 04:33:40,045 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:40,127 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:40,127 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:40,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:40,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 04:33:40,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:40,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:40,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-02-06 04:33:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:40,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:40,402 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:33:40,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:33:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:40,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528130589] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:40,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:40,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 29 [2025-02-06 04:33:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965134080] [2025-02-06 04:33:40,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:40,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 04:33:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:40,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 04:33:40,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2025-02-06 04:33:40,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:40,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 100 transitions, 1124 flow. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:40,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:40,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:40,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:40,874 INFO L124 PetriNetUnfolderBase]: 296/575 cut-off events. [2025-02-06 04:33:40,874 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2025-02-06 04:33:40,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 575 events. 296/575 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2566 event pairs, 71 based on Foata normal form. 4/579 useless extension candidates. Maximal degree in co-relation 3959. Up to 226 conditions per place. [2025-02-06 04:33:40,878 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 83 selfloop transitions, 42 changer transitions 1/127 dead transitions. [2025-02-06 04:33:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 1653 flow [2025-02-06 04:33:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:33:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:33:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2025-02-06 04:33:40,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2025-02-06 04:33:40,879 INFO L175 Difference]: Start difference. First operand has 122 places, 100 transitions, 1124 flow. Second operand 12 states and 98 transitions. [2025-02-06 04:33:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 1653 flow [2025-02-06 04:33:40,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 127 transitions, 1540 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-02-06 04:33:40,890 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 1133 flow [2025-02-06 04:33:40,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1133, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2025-02-06 04:33:40,891 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2025-02-06 04:33:40,891 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 1133 flow [2025-02-06 04:33:40,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:40,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:40,891 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:40,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 04:33:41,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:41,092 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:41,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2123224340, now seen corresponding path program 12 times [2025-02-06 04:33:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:41,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183108636] [2025-02-06 04:33:41,092 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:41,100 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:41,111 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:33:41,111 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:41,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183108636] [2025-02-06 04:33:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183108636] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104987798] [2025-02-06 04:33:41,408 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:41,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:41,410 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) [2025-02-06 04:33:41,412 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 [2025-02-06 04:33:41,487 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:41,509 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:33:41,509 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:41,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:41,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:33:41,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:41,617 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 04:33:41,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-06 04:33:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:41,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:41,777 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:41,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:33:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104987798] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:41,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:41,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-02-06 04:33:41,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450293126] [2025-02-06 04:33:41,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:41,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:33:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:41,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:33:41,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:33:41,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:41,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 1133 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:41,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:41,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:41,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:42,290 INFO L124 PetriNetUnfolderBase]: 324/623 cut-off events. [2025-02-06 04:33:42,291 INFO L125 PetriNetUnfolderBase]: For 7754/7754 co-relation queries the response was YES. [2025-02-06 04:33:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 623 events. 324/623 cut-off events. For 7754/7754 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2848 event pairs, 42 based on Foata normal form. 5/628 useless extension candidates. Maximal degree in co-relation 4210. Up to 263 conditions per place. [2025-02-06 04:33:42,296 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 103 selfloop transitions, 46 changer transitions 0/150 dead transitions. [2025-02-06 04:33:42,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 150 transitions, 1892 flow [2025-02-06 04:33:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:33:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:33:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2025-02-06 04:33:42,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2025-02-06 04:33:42,297 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 1133 flow. Second operand 16 states and 130 transitions. [2025-02-06 04:33:42,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 150 transitions, 1892 flow [2025-02-06 04:33:42,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 150 transitions, 1800 flow, removed 4 selfloop flow, removed 10 redundant places. [2025-02-06 04:33:42,310 INFO L231 Difference]: Finished difference. Result has 132 places, 106 transitions, 1225 flow [2025-02-06 04:33:42,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1225, PETRI_PLACES=132, PETRI_TRANSITIONS=106} [2025-02-06 04:33:42,312 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 110 predicate places. [2025-02-06 04:33:42,312 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 106 transitions, 1225 flow [2025-02-06 04:33:42,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:42,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:42,312 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:42,319 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 [2025-02-06 04:33:42,516 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,SelfDestructingSolverStorable20 [2025-02-06 04:33:42,516 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:42,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1900909951, now seen corresponding path program 13 times [2025-02-06 04:33:42,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:42,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557020101] [2025-02-06 04:33:42,517 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:42,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:42,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:42,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:42,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:42,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557020101] [2025-02-06 04:33:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557020101] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420597046] [2025-02-06 04:33:42,879 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:42,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:42,881 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) [2025-02-06 04:33:42,883 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 [2025-02-06 04:33:42,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:43,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:43,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:43,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:43,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:33:43,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:43,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:43,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:33:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:43,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:43,330 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:33:43,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:33:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420597046] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:43,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:43,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:33:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744148135] [2025-02-06 04:33:43,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:43,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:33:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:43,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:33:43,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:33:43,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:43,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 106 transitions, 1225 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:43,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:43,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:43,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:43,740 INFO L124 PetriNetUnfolderBase]: 325/631 cut-off events. [2025-02-06 04:33:43,740 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2025-02-06 04:33:43,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 631 events. 325/631 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2919 event pairs, 80 based on Foata normal form. 3/634 useless extension candidates. Maximal degree in co-relation 4362. Up to 270 conditions per place. [2025-02-06 04:33:43,745 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 94 selfloop transitions, 35 changer transitions 6/136 dead transitions. [2025-02-06 04:33:43,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 136 transitions, 1762 flow [2025-02-06 04:33:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:33:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:33:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2025-02-06 04:33:43,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-02-06 04:33:43,746 INFO L175 Difference]: Start difference. First operand has 132 places, 106 transitions, 1225 flow. Second operand 10 states and 90 transitions. [2025-02-06 04:33:43,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 136 transitions, 1762 flow [2025-02-06 04:33:43,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 136 transitions, 1649 flow, removed 18 selfloop flow, removed 15 redundant places. [2025-02-06 04:33:43,759 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 1188 flow [2025-02-06 04:33:43,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1188, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2025-02-06 04:33:43,759 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2025-02-06 04:33:43,759 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 1188 flow [2025-02-06 04:33:43,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:43,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:43,760 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:43,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 04:33:43,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:43,960 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:43,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1707713370, now seen corresponding path program 14 times [2025-02-06 04:33:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771383504] [2025-02-06 04:33:43,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:43,969 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:43,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:43,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:43,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:44,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771383504] [2025-02-06 04:33:44,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771383504] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261847203] [2025-02-06 04:33:44,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:44,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:44,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:44,390 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) [2025-02-06 04:33:44,391 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 [2025-02-06 04:33:44,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:44,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:44,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:44,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:44,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:33:44,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:44,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:44,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:33:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:44,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:44,687 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:44,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:33:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:44,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261847203] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:44,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:44,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:33:44,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583549809] [2025-02-06 04:33:44,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:44,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:33:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:44,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:33:44,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:33:44,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:44,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 1188 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:44,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:44,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:44,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:45,394 INFO L124 PetriNetUnfolderBase]: 350/677 cut-off events. [2025-02-06 04:33:45,395 INFO L125 PetriNetUnfolderBase]: For 8518/8518 co-relation queries the response was YES. [2025-02-06 04:33:45,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 677 events. 350/677 cut-off events. For 8518/8518 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3180 event pairs, 35 based on Foata normal form. 5/682 useless extension candidates. Maximal degree in co-relation 4637. Up to 242 conditions per place. [2025-02-06 04:33:45,399 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 110 selfloop transitions, 53 changer transitions 2/166 dead transitions. [2025-02-06 04:33:45,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 166 transitions, 2063 flow [2025-02-06 04:33:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:33:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:33:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 154 transitions. [2025-02-06 04:33:45,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-02-06 04:33:45,401 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 1188 flow. Second operand 19 states and 154 transitions. [2025-02-06 04:33:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 166 transitions, 2063 flow [2025-02-06 04:33:45,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 166 transitions, 1993 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 04:33:45,415 INFO L231 Difference]: Finished difference. Result has 138 places, 111 transitions, 1313 flow [2025-02-06 04:33:45,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1313, PETRI_PLACES=138, PETRI_TRANSITIONS=111} [2025-02-06 04:33:45,415 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 116 predicate places. [2025-02-06 04:33:45,415 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 111 transitions, 1313 flow [2025-02-06 04:33:45,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:45,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:45,415 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:45,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 04:33:45,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:45,616 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:45,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1686550445, now seen corresponding path program 15 times [2025-02-06 04:33:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029064606] [2025-02-06 04:33:45,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:45,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:45,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:45,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:45,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:45,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:45,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:45,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029064606] [2025-02-06 04:33:45,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029064606] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:45,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553842494] [2025-02-06 04:33:45,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:45,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:45,942 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) [2025-02-06 04:33:45,943 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 [2025-02-06 04:33:46,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:46,037 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:46,038 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:46,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:46,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:33:46,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:46,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:46,214 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:33:46,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:33:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:46,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553842494] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:46,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:46,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:33:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178893750] [2025-02-06 04:33:46,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:46,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:33:46,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:46,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:33:46,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:33:46,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:46,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 111 transitions, 1313 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:46,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:46,572 INFO L124 PetriNetUnfolderBase]: 343/661 cut-off events. [2025-02-06 04:33:46,572 INFO L125 PetriNetUnfolderBase]: For 8999/8999 co-relation queries the response was YES. [2025-02-06 04:33:46,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 661 events. 343/661 cut-off events. For 8999/8999 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3090 event pairs, 88 based on Foata normal form. 3/664 useless extension candidates. Maximal degree in co-relation 4712. Up to 327 conditions per place. [2025-02-06 04:33:46,577 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 90 selfloop transitions, 34 changer transitions 8/133 dead transitions. [2025-02-06 04:33:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 133 transitions, 1772 flow [2025-02-06 04:33:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:33:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:33:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2025-02-06 04:33:46,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2025-02-06 04:33:46,579 INFO L175 Difference]: Start difference. First operand has 138 places, 111 transitions, 1313 flow. Second operand 9 states and 75 transitions. [2025-02-06 04:33:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 133 transitions, 1772 flow [2025-02-06 04:33:46,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 133 transitions, 1622 flow, removed 15 selfloop flow, removed 15 redundant places. [2025-02-06 04:33:46,594 INFO L231 Difference]: Finished difference. Result has 133 places, 111 transitions, 1243 flow [2025-02-06 04:33:46,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1243, PETRI_PLACES=133, PETRI_TRANSITIONS=111} [2025-02-06 04:33:46,594 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2025-02-06 04:33:46,594 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 111 transitions, 1243 flow [2025-02-06 04:33:46,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:46,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:46,595 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:46,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 04:33:46,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:46,795 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:46,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1633516170, now seen corresponding path program 16 times [2025-02-06 04:33:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:46,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119726280] [2025-02-06 04:33:46,796 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:46,803 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:46,813 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:46,813 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:46,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 04:33:47,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119726280] [2025-02-06 04:33:47,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119726280] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985272288] [2025-02-06 04:33:47,346 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:47,348 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) [2025-02-06 04:33:47,351 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 [2025-02-06 04:33:47,453 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:47,479 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:47,479 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:47,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:47,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:33:47,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:47,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:47,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:33:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:47,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:47,707 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:33:47,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:33:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985272288] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:47,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2025-02-06 04:33:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717236409] [2025-02-06 04:33:47,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:47,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 04:33:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:47,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 04:33:47,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-02-06 04:33:47,718 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:47,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 111 transitions, 1243 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:47,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:47,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:47,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:48,191 INFO L124 PetriNetUnfolderBase]: 334/634 cut-off events. [2025-02-06 04:33:48,191 INFO L125 PetriNetUnfolderBase]: For 8279/8279 co-relation queries the response was YES. [2025-02-06 04:33:48,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 634 events. 334/634 cut-off events. For 8279/8279 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2865 event pairs, 36 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 4403. Up to 234 conditions per place. [2025-02-06 04:33:48,196 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 84 selfloop transitions, 52 changer transitions 2/139 dead transitions. [2025-02-06 04:33:48,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1797 flow [2025-02-06 04:33:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:33:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:33:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 115 transitions. [2025-02-06 04:33:48,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2025-02-06 04:33:48,197 INFO L175 Difference]: Start difference. First operand has 133 places, 111 transitions, 1243 flow. Second operand 16 states and 115 transitions. [2025-02-06 04:33:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1797 flow [2025-02-06 04:33:48,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 1724 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-02-06 04:33:48,211 INFO L231 Difference]: Finished difference. Result has 137 places, 109 transitions, 1262 flow [2025-02-06 04:33:48,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1262, PETRI_PLACES=137, PETRI_TRANSITIONS=109} [2025-02-06 04:33:48,211 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 115 predicate places. [2025-02-06 04:33:48,211 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 109 transitions, 1262 flow [2025-02-06 04:33:48,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:48,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:48,211 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:48,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 04:33:48,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-06 04:33:48,413 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:48,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1450991107, now seen corresponding path program 17 times [2025-02-06 04:33:48,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:48,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730013326] [2025-02-06 04:33:48,413 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:48,421 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:48,446 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:48,446 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:48,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:33:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730013326] [2025-02-06 04:33:48,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730013326] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669045286] [2025-02-06 04:33:48,928 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:48,930 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) [2025-02-06 04:33:48,931 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 [2025-02-06 04:33:49,010 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:49,060 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:49,060 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:49,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:49,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-06 04:33:49,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:49,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:33:49,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:33:49,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:49,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2025-02-06 04:33:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 04:33:49,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:49,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669045286] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:49,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:49,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 7] total 28 [2025-02-06 04:33:49,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871525761] [2025-02-06 04:33:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:49,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 04:33:49,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:49,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 04:33:49,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2025-02-06 04:33:49,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:49,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 109 transitions, 1262 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:49,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:49,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:50,009 INFO L124 PetriNetUnfolderBase]: 341/652 cut-off events. [2025-02-06 04:33:50,009 INFO L125 PetriNetUnfolderBase]: For 8736/8736 co-relation queries the response was YES. [2025-02-06 04:33:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4736 conditions, 652 events. 341/652 cut-off events. For 8736/8736 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2974 event pairs, 131 based on Foata normal form. 6/658 useless extension candidates. Maximal degree in co-relation 4641. Up to 525 conditions per place. [2025-02-06 04:33:50,015 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 95 selfloop transitions, 34 changer transitions 5/135 dead transitions. [2025-02-06 04:33:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 135 transitions, 1820 flow [2025-02-06 04:33:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:33:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:33:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 113 transitions. [2025-02-06 04:33:50,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3210227272727273 [2025-02-06 04:33:50,015 INFO L175 Difference]: Start difference. First operand has 137 places, 109 transitions, 1262 flow. Second operand 16 states and 113 transitions. [2025-02-06 04:33:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 135 transitions, 1820 flow [2025-02-06 04:33:50,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 1714 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-02-06 04:33:50,031 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1289 flow [2025-02-06 04:33:50,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1289, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2025-02-06 04:33:50,031 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2025-02-06 04:33:50,031 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1289 flow [2025-02-06 04:33:50,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:50,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:50,032 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:50,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 04:33:50,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:50,232 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:50,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1394279417, now seen corresponding path program 18 times [2025-02-06 04:33:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698798781] [2025-02-06 04:33:50,233 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:50,240 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:50,248 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:33:50,248 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:50,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:50,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:50,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698798781] [2025-02-06 04:33:50,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698798781] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:50,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282072862] [2025-02-06 04:33:50,521 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:50,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:50,523 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) [2025-02-06 04:33:50,525 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 [2025-02-06 04:33:50,615 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:50,634 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:33:50,634 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:33:50,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:50,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 04:33:50,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:50,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:50,864 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:50,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:33:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:50,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282072862] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:50,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:50,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-02-06 04:33:50,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434729430] [2025-02-06 04:33:50,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:50,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:33:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:50,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:33:50,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:33:50,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:50,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1289 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:50,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:50,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:50,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:51,231 INFO L124 PetriNetUnfolderBase]: 329/629 cut-off events. [2025-02-06 04:33:51,231 INFO L125 PetriNetUnfolderBase]: For 9542/9542 co-relation queries the response was YES. [2025-02-06 04:33:51,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 629 events. 329/629 cut-off events. For 9542/9542 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2854 event pairs, 124 based on Foata normal form. 6/635 useless extension candidates. Maximal degree in co-relation 4477. Up to 500 conditions per place. [2025-02-06 04:33:51,236 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 106 selfloop transitions, 25 changer transitions 7/139 dead transitions. [2025-02-06 04:33:51,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1816 flow [2025-02-06 04:33:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:33:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:33:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2025-02-06 04:33:51,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33916083916083917 [2025-02-06 04:33:51,238 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1289 flow. Second operand 13 states and 97 transitions. [2025-02-06 04:33:51,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1816 flow [2025-02-06 04:33:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 139 transitions, 1703 flow, removed 16 selfloop flow, removed 14 redundant places. [2025-02-06 04:33:51,254 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1240 flow [2025-02-06 04:33:51,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1240, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2025-02-06 04:33:51,254 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2025-02-06 04:33:51,255 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1240 flow [2025-02-06 04:33:51,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:51,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:51,255 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:51,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 04:33:51,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-06 04:33:51,456 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:51,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 706233048, now seen corresponding path program 19 times [2025-02-06 04:33:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:51,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108691773] [2025-02-06 04:33:51,456 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:51,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:51,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:51,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:51,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108691773] [2025-02-06 04:33:51,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108691773] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401264996] [2025-02-06 04:33:51,788 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:51,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:51,790 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) [2025-02-06 04:33:51,792 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 [2025-02-06 04:33:51,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:51,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:51,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:51,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:51,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:33:51,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:51,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:51,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:33:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:51,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:52,092 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:52,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:33:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401264996] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:52,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:52,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:33:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703432135] [2025-02-06 04:33:52,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:52,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:33:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:52,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:33:52,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:33:52,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:52,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1240 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:52,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:52,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:52,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:52,435 INFO L124 PetriNetUnfolderBase]: 335/642 cut-off events. [2025-02-06 04:33:52,435 INFO L125 PetriNetUnfolderBase]: For 9864/9864 co-relation queries the response was YES. [2025-02-06 04:33:52,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 642 events. 335/642 cut-off events. For 9864/9864 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2929 event pairs, 135 based on Foata normal form. 5/647 useless extension candidates. Maximal degree in co-relation 4559. Up to 534 conditions per place. [2025-02-06 04:33:52,440 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2025-02-06 04:33:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 126 transitions, 1634 flow [2025-02-06 04:33:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:33:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:33:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2025-02-06 04:33:52,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2025-02-06 04:33:52,441 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1240 flow. Second operand 9 states and 71 transitions. [2025-02-06 04:33:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 126 transitions, 1634 flow [2025-02-06 04:33:52,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 126 transitions, 1585 flow, removed 2 selfloop flow, removed 9 redundant places. [2025-02-06 04:33:52,459 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1276 flow [2025-02-06 04:33:52,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1276, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2025-02-06 04:33:52,460 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 115 predicate places. [2025-02-06 04:33:52,460 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1276 flow [2025-02-06 04:33:52,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:52,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:52,460 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:52,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 04:33:52,660 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,SelfDestructingSolverStorable27 [2025-02-06 04:33:52,661 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:52,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:52,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1093483490, now seen corresponding path program 20 times [2025-02-06 04:33:52,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:52,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929752778] [2025-02-06 04:33:52,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:52,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:52,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:52,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:52,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:52,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929752778] [2025-02-06 04:33:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929752778] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758042595] [2025-02-06 04:33:53,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:33:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:53,030 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) [2025-02-06 04:33:53,031 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 [2025-02-06 04:33:53,121 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:53,144 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:53,144 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:33:53,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:53,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:33:53,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:53,257 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 04:33:53,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-06 04:33:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:53,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:53,449 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:53,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:33:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758042595] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:53,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:53,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-02-06 04:33:53,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465771123] [2025-02-06 04:33:53,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:53,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 04:33:53,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:53,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 04:33:53,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2025-02-06 04:33:53,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:53,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1276 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:53,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:53,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:53,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:53,918 INFO L124 PetriNetUnfolderBase]: 351/671 cut-off events. [2025-02-06 04:33:53,918 INFO L125 PetriNetUnfolderBase]: For 10556/10556 co-relation queries the response was YES. [2025-02-06 04:33:53,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 671 events. 351/671 cut-off events. For 10556/10556 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3100 event pairs, 47 based on Foata normal form. 8/679 useless extension candidates. Maximal degree in co-relation 4871. Up to 551 conditions per place. [2025-02-06 04:33:53,923 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 110 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2025-02-06 04:33:53,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 140 transitions, 1813 flow [2025-02-06 04:33:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:33:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:33:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2025-02-06 04:33:53,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32792207792207795 [2025-02-06 04:33:53,924 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1276 flow. Second operand 14 states and 101 transitions. [2025-02-06 04:33:53,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 140 transitions, 1813 flow [2025-02-06 04:33:53,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 140 transitions, 1751 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-02-06 04:33:53,943 INFO L231 Difference]: Finished difference. Result has 146 places, 118 transitions, 1403 flow [2025-02-06 04:33:53,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1403, PETRI_PLACES=146, PETRI_TRANSITIONS=118} [2025-02-06 04:33:53,944 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2025-02-06 04:33:53,944 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 118 transitions, 1403 flow [2025-02-06 04:33:53,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:53,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:53,944 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:53,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 04:33:54,144 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,SelfDestructingSolverStorable28 [2025-02-06 04:33:54,144 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:54,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1389661184, now seen corresponding path program 21 times [2025-02-06 04:33:54,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:54,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200651927] [2025-02-06 04:33:54,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:54,153 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:54,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:54,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:54,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:54,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:54,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200651927] [2025-02-06 04:33:54,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200651927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:54,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775833193] [2025-02-06 04:33:54,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:33:54,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:54,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:54,458 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) [2025-02-06 04:33:54,459 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 [2025-02-06 04:33:54,551 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:54,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:33:54,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:33:54,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:54,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:33:54,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:54,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:54,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:33:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:54,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:54,731 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:54,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:33:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775833193] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:54,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:33:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82396559] [2025-02-06 04:33:54,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:54,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:33:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:54,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:33:54,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:33:54,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:54,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 118 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:54,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:54,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:54,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:55,136 INFO L124 PetriNetUnfolderBase]: 349/669 cut-off events. [2025-02-06 04:33:55,136 INFO L125 PetriNetUnfolderBase]: For 11792/11792 co-relation queries the response was YES. [2025-02-06 04:33:55,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5133 conditions, 669 events. 349/669 cut-off events. For 11792/11792 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3084 event pairs, 129 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 5036. Up to 544 conditions per place. [2025-02-06 04:33:55,141 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 106 selfloop transitions, 27 changer transitions 2/136 dead transitions. [2025-02-06 04:33:55,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 136 transitions, 1826 flow [2025-02-06 04:33:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:33:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:33:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2025-02-06 04:33:55,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34297520661157027 [2025-02-06 04:33:55,142 INFO L175 Difference]: Start difference. First operand has 146 places, 118 transitions, 1403 flow. Second operand 11 states and 83 transitions. [2025-02-06 04:33:55,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 136 transitions, 1826 flow [2025-02-06 04:33:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1714 flow, removed 39 selfloop flow, removed 8 redundant places. [2025-02-06 04:33:55,163 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 1327 flow [2025-02-06 04:33:55,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1327, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2025-02-06 04:33:55,163 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2025-02-06 04:33:55,163 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 1327 flow [2025-02-06 04:33:55,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:55,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:55,164 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:55,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-06 04:33:55,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:55,364 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:55,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 168377470, now seen corresponding path program 22 times [2025-02-06 04:33:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:55,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317952141] [2025-02-06 04:33:55,365 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:55,375 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:55,391 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:55,392 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:55,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317952141] [2025-02-06 04:33:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317952141] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452661023] [2025-02-06 04:33:55,690 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:33:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:55,692 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) [2025-02-06 04:33:55,692 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 [2025-02-06 04:33:55,782 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:33:55,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:55,804 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:33:55,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:55,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:33:55,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:55,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:55,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:33:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:55,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:55,977 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:55,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:33:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452661023] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:56,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:33:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278365495] [2025-02-06 04:33:56,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:56,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:33:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:56,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:33:56,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:33:56,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:56,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 1327 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:56,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:56,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:56,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:56,356 INFO L124 PetriNetUnfolderBase]: 353/663 cut-off events. [2025-02-06 04:33:56,356 INFO L125 PetriNetUnfolderBase]: For 12620/12620 co-relation queries the response was YES. [2025-02-06 04:33:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 663 events. 353/663 cut-off events. For 12620/12620 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3049 event pairs, 128 based on Foata normal form. 7/670 useless extension candidates. Maximal degree in co-relation 5040. Up to 526 conditions per place. [2025-02-06 04:33:56,361 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2025-02-06 04:33:56,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 133 transitions, 1790 flow [2025-02-06 04:33:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:33:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:33:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2025-02-06 04:33:56,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34297520661157027 [2025-02-06 04:33:56,362 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 1327 flow. Second operand 11 states and 83 transitions. [2025-02-06 04:33:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 133 transitions, 1790 flow [2025-02-06 04:33:56,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 133 transitions, 1726 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-02-06 04:33:56,384 INFO L231 Difference]: Finished difference. Result has 144 places, 114 transitions, 1379 flow [2025-02-06 04:33:56,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1379, PETRI_PLACES=144, PETRI_TRANSITIONS=114} [2025-02-06 04:33:56,384 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2025-02-06 04:33:56,385 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 114 transitions, 1379 flow [2025-02-06 04:33:56,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:56,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:56,385 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:56,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-06 04:33:56,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-02-06 04:33:56,585 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:56,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2064378688, now seen corresponding path program 23 times [2025-02-06 04:33:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:56,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880454640] [2025-02-06 04:33:56,586 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:56,593 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:56,611 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:56,611 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:56,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:33:56,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880454640] [2025-02-06 04:33:56,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880454640] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131922270] [2025-02-06 04:33:56,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:33:56,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:56,925 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:33:56,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-06 04:33:57,020 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:57,062 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:57,062 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:33:57,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:57,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:33:57,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:57,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:57,288 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:57,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:33:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:57,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131922270] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:57,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-02-06 04:33:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181423993] [2025-02-06 04:33:57,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:57,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:33:57,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:57,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:33:57,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:33:57,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:57,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 114 transitions, 1379 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:57,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:57,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:57,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:57,631 INFO L124 PetriNetUnfolderBase]: 349/651 cut-off events. [2025-02-06 04:33:57,631 INFO L125 PetriNetUnfolderBase]: For 13166/13166 co-relation queries the response was YES. [2025-02-06 04:33:57,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5147 conditions, 651 events. 349/651 cut-off events. For 13166/13166 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2929 event pairs, 141 based on Foata normal form. 2/653 useless extension candidates. Maximal degree in co-relation 5051. Up to 574 conditions per place. [2025-02-06 04:33:57,635 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 96 selfloop transitions, 21 changer transitions 4/122 dead transitions. [2025-02-06 04:33:57,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 122 transitions, 1685 flow [2025-02-06 04:33:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:33:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:33:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 68 transitions. [2025-02-06 04:33:57,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3090909090909091 [2025-02-06 04:33:57,636 INFO L175 Difference]: Start difference. First operand has 144 places, 114 transitions, 1379 flow. Second operand 10 states and 68 transitions. [2025-02-06 04:33:57,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 122 transitions, 1685 flow [2025-02-06 04:33:57,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 122 transitions, 1598 flow, removed 18 selfloop flow, removed 8 redundant places. [2025-02-06 04:33:57,659 INFO L231 Difference]: Finished difference. Result has 145 places, 111 transitions, 1307 flow [2025-02-06 04:33:57,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1307, PETRI_PLACES=145, PETRI_TRANSITIONS=111} [2025-02-06 04:33:57,660 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2025-02-06 04:33:57,660 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 111 transitions, 1307 flow [2025-02-06 04:33:57,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:57,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:57,660 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:57,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 04:33:57,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-06 04:33:57,861 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:57,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:57,861 INFO L85 PathProgramCache]: Analyzing trace with hash 480392447, now seen corresponding path program 24 times [2025-02-06 04:33:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:57,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034019631] [2025-02-06 04:33:57,861 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:57,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:57,869 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:57,881 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:57,882 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 04:33:57,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034019631] [2025-02-06 04:33:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034019631] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225064658] [2025-02-06 04:33:58,227 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:33:58,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:58,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:58,230 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:33:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-06 04:33:58,346 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:33:58,376 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:58,376 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 04:33:58,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:58,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 04:33:58,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:58,524 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-06 04:33:58,524 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 25 treesize of output 9 [2025-02-06 04:33:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:58,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:33:58,687 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:33:58,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:33:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:58,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225064658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:33:58,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:33:58,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2025-02-06 04:33:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648144393] [2025-02-06 04:33:58,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:33:58,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:33:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:33:58,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:33:58,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:33:58,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:33:58,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 111 transitions, 1307 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:58,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:33:58,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:33:58,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:33:59,175 INFO L124 PetriNetUnfolderBase]: 366/678 cut-off events. [2025-02-06 04:33:59,175 INFO L125 PetriNetUnfolderBase]: For 12840/12840 co-relation queries the response was YES. [2025-02-06 04:33:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 678 events. 366/678 cut-off events. For 12840/12840 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3074 event pairs, 131 based on Foata normal form. 10/688 useless extension candidates. Maximal degree in co-relation 5231. Up to 570 conditions per place. [2025-02-06 04:33:59,179 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 106 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2025-02-06 04:33:59,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 140 transitions, 1971 flow [2025-02-06 04:33:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 04:33:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 04:33:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 107 transitions. [2025-02-06 04:33:59,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3242424242424242 [2025-02-06 04:33:59,180 INFO L175 Difference]: Start difference. First operand has 145 places, 111 transitions, 1307 flow. Second operand 15 states and 107 transitions. [2025-02-06 04:33:59,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 140 transitions, 1971 flow [2025-02-06 04:33:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 1925 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 04:33:59,200 INFO L231 Difference]: Finished difference. Result has 152 places, 120 transitions, 1537 flow [2025-02-06 04:33:59,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1537, PETRI_PLACES=152, PETRI_TRANSITIONS=120} [2025-02-06 04:33:59,200 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2025-02-06 04:33:59,201 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 120 transitions, 1537 flow [2025-02-06 04:33:59,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:33:59,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:33:59,201 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:33:59,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-06 04:33:59,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:59,401 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:33:59,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:33:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -843106315, now seen corresponding path program 25 times [2025-02-06 04:33:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:33:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006574067] [2025-02-06 04:33:59,402 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:33:59,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:59,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:59,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:59,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:33:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:33:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006574067] [2025-02-06 04:33:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006574067] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:33:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937867879] [2025-02-06 04:33:59,705 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:33:59,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:33:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:33:59,707 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:33:59,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-06 04:33:59,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:33:59,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:33:59,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:33:59,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:33:59,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:33:59,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:33:59,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:33:59,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:33:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:33:59,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:00,027 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:00,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:34:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:00,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937867879] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:00,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:00,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:34:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833760887] [2025-02-06 04:34:00,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:00,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:34:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:00,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:34:00,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:34:00,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:00,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 120 transitions, 1537 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:00,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:00,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:00,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:00,367 INFO L124 PetriNetUnfolderBase]: 367/674 cut-off events. [2025-02-06 04:34:00,367 INFO L125 PetriNetUnfolderBase]: For 13945/13945 co-relation queries the response was YES. [2025-02-06 04:34:00,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 674 events. 367/674 cut-off events. For 13945/13945 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3024 event pairs, 134 based on Foata normal form. 4/678 useless extension candidates. Maximal degree in co-relation 5444. Up to 560 conditions per place. [2025-02-06 04:34:00,372 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 29 changer transitions 0/137 dead transitions. [2025-02-06 04:34:00,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 137 transitions, 2089 flow [2025-02-06 04:34:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:34:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:34:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 80 transitions. [2025-02-06 04:34:00,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2025-02-06 04:34:00,373 INFO L175 Difference]: Start difference. First operand has 152 places, 120 transitions, 1537 flow. Second operand 11 states and 80 transitions. [2025-02-06 04:34:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 137 transitions, 2089 flow [2025-02-06 04:34:00,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 137 transitions, 1922 flow, removed 64 selfloop flow, removed 11 redundant places. [2025-02-06 04:34:00,397 INFO L231 Difference]: Finished difference. Result has 151 places, 121 transitions, 1469 flow [2025-02-06 04:34:00,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1469, PETRI_PLACES=151, PETRI_TRANSITIONS=121} [2025-02-06 04:34:00,397 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-02-06 04:34:00,398 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 121 transitions, 1469 flow [2025-02-06 04:34:00,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:00,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:00,398 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:00,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-06 04:34:00,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-02-06 04:34:00,599 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:00,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -77563729, now seen corresponding path program 26 times [2025-02-06 04:34:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412870830] [2025-02-06 04:34:00,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:00,606 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:00,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:00,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:00,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412870830] [2025-02-06 04:34:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412870830] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790342608] [2025-02-06 04:34:00,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:00,969 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:00,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-06 04:34:01,079 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:01,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:01,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:01,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:01,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:01,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:01,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:01,251 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:01,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790342608] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:01,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:01,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:01,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395516287] [2025-02-06 04:34:01,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:01,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:01,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:01,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:01,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:01,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:01,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 121 transitions, 1469 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:01,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:01,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:01,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:01,574 INFO L124 PetriNetUnfolderBase]: 364/671 cut-off events. [2025-02-06 04:34:01,574 INFO L125 PetriNetUnfolderBase]: For 14803/14803 co-relation queries the response was YES. [2025-02-06 04:34:01,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5434 conditions, 671 events. 364/671 cut-off events. For 14803/14803 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3027 event pairs, 134 based on Foata normal form. 3/674 useless extension candidates. Maximal degree in co-relation 5336. Up to 567 conditions per place. [2025-02-06 04:34:01,579 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 22 changer transitions 8/135 dead transitions. [2025-02-06 04:34:01,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 135 transitions, 1863 flow [2025-02-06 04:34:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:34:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:34:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2025-02-06 04:34:01,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 04:34:01,580 INFO L175 Difference]: Start difference. First operand has 151 places, 121 transitions, 1469 flow. Second operand 9 states and 66 transitions. [2025-02-06 04:34:01,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 135 transitions, 1863 flow [2025-02-06 04:34:01,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 135 transitions, 1799 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:01,600 INFO L231 Difference]: Finished difference. Result has 152 places, 121 transitions, 1456 flow [2025-02-06 04:34:01,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1456, PETRI_PLACES=152, PETRI_TRANSITIONS=121} [2025-02-06 04:34:01,601 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2025-02-06 04:34:01,601 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 121 transitions, 1456 flow [2025-02-06 04:34:01,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:01,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:01,601 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:01,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:01,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:01,802 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:01,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash 322662635, now seen corresponding path program 27 times [2025-02-06 04:34:01,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:01,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796615458] [2025-02-06 04:34:01,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:01,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:01,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:01,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:34:01,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:01,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:02,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796615458] [2025-02-06 04:34:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796615458] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823470008] [2025-02-06 04:34:02,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:02,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:02,096 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:02,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-06 04:34:02,203 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:02,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:34:02,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:02,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:02,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 04:34:02,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:02,336 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 04:34:02,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-06 04:34:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:02,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:02,533 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:02,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:34:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823470008] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:02,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:02,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-02-06 04:34:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475937140] [2025-02-06 04:34:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:02,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:34:02,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:02,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:34:02,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:34:02,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:02,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 121 transitions, 1456 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:02,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:02,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:02,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:02,988 INFO L124 PetriNetUnfolderBase]: 378/689 cut-off events. [2025-02-06 04:34:02,988 INFO L125 PetriNetUnfolderBase]: For 15311/15311 co-relation queries the response was YES. [2025-02-06 04:34:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5723 conditions, 689 events. 378/689 cut-off events. For 15311/15311 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3110 event pairs, 95 based on Foata normal form. 6/695 useless extension candidates. Maximal degree in co-relation 5643. Up to 560 conditions per place. [2025-02-06 04:34:02,992 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 112 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2025-02-06 04:34:02,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 146 transitions, 2133 flow [2025-02-06 04:34:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:34:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:34:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 97 transitions. [2025-02-06 04:34:02,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31493506493506496 [2025-02-06 04:34:02,993 INFO L175 Difference]: Start difference. First operand has 152 places, 121 transitions, 1456 flow. Second operand 14 states and 97 transitions. [2025-02-06 04:34:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 146 transitions, 2133 flow [2025-02-06 04:34:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 146 transitions, 2083 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:03,014 INFO L231 Difference]: Finished difference. Result has 159 places, 128 transitions, 1657 flow [2025-02-06 04:34:03,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1657, PETRI_PLACES=159, PETRI_TRANSITIONS=128} [2025-02-06 04:34:03,015 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 137 predicate places. [2025-02-06 04:34:03,015 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 128 transitions, 1657 flow [2025-02-06 04:34:03,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:03,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:03,015 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:03,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-06 04:34:03,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:03,215 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:03,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash -284385783, now seen corresponding path program 28 times [2025-02-06 04:34:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600666233] [2025-02-06 04:34:03,216 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:03,224 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:03,235 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:03,235 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:03,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600666233] [2025-02-06 04:34:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600666233] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613120299] [2025-02-06 04:34:03,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:03,535 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:03,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-06 04:34:03,649 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:03,674 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:03,674 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:03,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:03,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:34:03,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:03,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:03,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:34:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:03,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:03,858 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:34:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:34:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:03,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613120299] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:03,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:03,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469878984] [2025-02-06 04:34:03,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:03,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:03,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:03,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:03,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:03,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 128 transitions, 1657 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:03,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:03,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:03,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:04,389 INFO L124 PetriNetUnfolderBase]: 402/739 cut-off events. [2025-02-06 04:34:04,389 INFO L125 PetriNetUnfolderBase]: For 19167/19167 co-relation queries the response was YES. [2025-02-06 04:34:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 739 events. 402/739 cut-off events. For 19167/19167 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3414 event pairs, 28 based on Foata normal form. 4/743 useless extension candidates. Maximal degree in co-relation 6365. Up to 290 conditions per place. [2025-02-06 04:34:04,393 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 118 selfloop transitions, 56 changer transitions 3/178 dead transitions. [2025-02-06 04:34:04,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 178 transitions, 2871 flow [2025-02-06 04:34:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:34:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:34:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 127 transitions. [2025-02-06 04:34:04,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2025-02-06 04:34:04,394 INFO L175 Difference]: Start difference. First operand has 159 places, 128 transitions, 1657 flow. Second operand 16 states and 127 transitions. [2025-02-06 04:34:04,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 178 transitions, 2871 flow [2025-02-06 04:34:04,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 178 transitions, 2728 flow, removed 55 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:04,425 INFO L231 Difference]: Finished difference. Result has 170 places, 133 transitions, 1799 flow [2025-02-06 04:34:04,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1799, PETRI_PLACES=170, PETRI_TRANSITIONS=133} [2025-02-06 04:34:04,426 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-02-06 04:34:04,426 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 133 transitions, 1799 flow [2025-02-06 04:34:04,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:04,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:04,426 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:04,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:04,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-02-06 04:34:04,627 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:04,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash -751574872, now seen corresponding path program 29 times [2025-02-06 04:34:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774752262] [2025-02-06 04:34:04,627 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:04,635 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:04,650 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:04,651 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:04,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:34:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774752262] [2025-02-06 04:34:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774752262] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591201764] [2025-02-06 04:34:04,947 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:04,949 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:04,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-06 04:34:05,065 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:05,168 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:05,168 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:05,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:05,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 04:34:05,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:05,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:05,360 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:34:05,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:34:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:05,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591201764] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:05,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:05,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-02-06 04:34:05,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387861640] [2025-02-06 04:34:05,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:05,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:34:05,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:05,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:34:05,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:34:05,380 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:05,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 133 transitions, 1799 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:05,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:05,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:05,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:05,671 INFO L124 PetriNetUnfolderBase]: 403/748 cut-off events. [2025-02-06 04:34:05,671 INFO L125 PetriNetUnfolderBase]: For 21153/21153 co-relation queries the response was YES. [2025-02-06 04:34:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6667 conditions, 748 events. 403/748 cut-off events. For 21153/21153 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3530 event pairs, 80 based on Foata normal form. 2/750 useless extension candidates. Maximal degree in co-relation 6561. Up to 397 conditions per place. [2025-02-06 04:34:05,676 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 104 selfloop transitions, 49 changer transitions 10/164 dead transitions. [2025-02-06 04:34:05,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 164 transitions, 2528 flow [2025-02-06 04:34:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2025-02-06 04:34:05,677 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2025-02-06 04:34:05,677 INFO L175 Difference]: Start difference. First operand has 170 places, 133 transitions, 1799 flow. Second operand 10 states and 77 transitions. [2025-02-06 04:34:05,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 164 transitions, 2528 flow [2025-02-06 04:34:05,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 164 transitions, 2287 flow, removed 41 selfloop flow, removed 13 redundant places. [2025-02-06 04:34:05,710 INFO L231 Difference]: Finished difference. Result has 170 places, 134 transitions, 1765 flow [2025-02-06 04:34:05,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1765, PETRI_PLACES=170, PETRI_TRANSITIONS=134} [2025-02-06 04:34:05,710 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-02-06 04:34:05,710 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 134 transitions, 1765 flow [2025-02-06 04:34:05,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:05,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:05,711 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:05,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-02-06 04:34:05,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-02-06 04:34:05,911 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:05,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1983263475, now seen corresponding path program 30 times [2025-02-06 04:34:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:05,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824771226] [2025-02-06 04:34:05,912 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:05,919 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:05,932 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:05,932 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 04:34:05,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:06,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824771226] [2025-02-06 04:34:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824771226] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618650077] [2025-02-06 04:34:06,255 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:06,257 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:06,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-06 04:34:06,364 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:06,390 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:06,390 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 04:34:06,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:06,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-06 04:34:06,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:06,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:06,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2025-02-06 04:34:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:06,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:06,652 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:06,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618650077] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:06,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-02-06 04:34:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573939277] [2025-02-06 04:34:06,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:06,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:06,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:06,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:06,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:06,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 134 transitions, 1765 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:06,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:06,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:06,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:07,425 INFO L124 PetriNetUnfolderBase]: 437/845 cut-off events. [2025-02-06 04:34:07,425 INFO L125 PetriNetUnfolderBase]: For 24788/24788 co-relation queries the response was YES. [2025-02-06 04:34:07,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 845 events. 437/845 cut-off events. For 24788/24788 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4252 event pairs, 139 based on Foata normal form. 13/858 useless extension candidates. Maximal degree in co-relation 7459. Up to 600 conditions per place. [2025-02-06 04:34:07,431 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 158 selfloop transitions, 44 changer transitions 4/207 dead transitions. [2025-02-06 04:34:07,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 207 transitions, 3114 flow [2025-02-06 04:34:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:34:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:34:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 170 transitions. [2025-02-06 04:34:07,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2025-02-06 04:34:07,433 INFO L175 Difference]: Start difference. First operand has 170 places, 134 transitions, 1765 flow. Second operand 21 states and 170 transitions. [2025-02-06 04:34:07,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 207 transitions, 3114 flow [2025-02-06 04:34:07,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 207 transitions, 2907 flow, removed 75 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:07,478 INFO L231 Difference]: Finished difference. Result has 187 places, 147 transitions, 2076 flow [2025-02-06 04:34:07,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2076, PETRI_PLACES=187, PETRI_TRANSITIONS=147} [2025-02-06 04:34:07,478 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2025-02-06 04:34:07,478 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 147 transitions, 2076 flow [2025-02-06 04:34:07,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:07,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:07,478 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:07,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-02-06 04:34:07,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-02-06 04:34:07,679 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:07,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:07,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2044598509, now seen corresponding path program 31 times [2025-02-06 04:34:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583390871] [2025-02-06 04:34:07,680 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:07,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:07,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:07,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:07,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:07,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583390871] [2025-02-06 04:34:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583390871] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822460085] [2025-02-06 04:34:07,977 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:07,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:07,980 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-02-06 04:34:08,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:08,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:08,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:08,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:08,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:08,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:08,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:08,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:34:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:08,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:08,293 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:08,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:34:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:08,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822460085] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:08,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:08,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622236750] [2025-02-06 04:34:08,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:08,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:08,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:08,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:08,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:08,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:08,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 147 transitions, 2076 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:08,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:08,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:08,630 INFO L124 PetriNetUnfolderBase]: 427/831 cut-off events. [2025-02-06 04:34:08,630 INFO L125 PetriNetUnfolderBase]: For 19744/19744 co-relation queries the response was YES. [2025-02-06 04:34:08,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7105 conditions, 831 events. 427/831 cut-off events. For 19744/19744 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4181 event pairs, 147 based on Foata normal form. 6/837 useless extension candidates. Maximal degree in co-relation 6995. Up to 651 conditions per place. [2025-02-06 04:34:08,636 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 130 selfloop transitions, 35 changer transitions 6/172 dead transitions. [2025-02-06 04:34:08,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 172 transitions, 2787 flow [2025-02-06 04:34:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:34:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:34:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2025-02-06 04:34:08,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-02-06 04:34:08,636 INFO L175 Difference]: Start difference. First operand has 187 places, 147 transitions, 2076 flow. Second operand 12 states and 92 transitions. [2025-02-06 04:34:08,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 172 transitions, 2787 flow [2025-02-06 04:34:08,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 172 transitions, 2499 flow, removed 124 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:08,677 INFO L231 Difference]: Finished difference. Result has 191 places, 148 transitions, 1903 flow [2025-02-06 04:34:08,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1903, PETRI_PLACES=191, PETRI_TRANSITIONS=148} [2025-02-06 04:34:08,678 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 169 predicate places. [2025-02-06 04:34:08,678 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 148 transitions, 1903 flow [2025-02-06 04:34:08,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:08,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:08,678 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:08,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-02-06 04:34:08,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,34 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:08,878 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:08,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1270861412, now seen corresponding path program 32 times [2025-02-06 04:34:08,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:08,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239593022] [2025-02-06 04:34:08,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:08,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:08,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:08,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:08,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:09,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239593022] [2025-02-06 04:34:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239593022] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364968910] [2025-02-06 04:34:09,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:09,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:09,241 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:09,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-02-06 04:34:09,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:09,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:09,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:09,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:09,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:09,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:09,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:09,569 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:34:09,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:34:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:09,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364968910] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:09,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:09,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:09,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113919921] [2025-02-06 04:34:09,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:09,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:09,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:09,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:09,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:09,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 148 transitions, 1903 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:09,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:09,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:09,951 INFO L124 PetriNetUnfolderBase]: 418/812 cut-off events. [2025-02-06 04:34:09,951 INFO L125 PetriNetUnfolderBase]: For 17137/17137 co-relation queries the response was YES. [2025-02-06 04:34:09,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 812 events. 418/812 cut-off events. For 17137/17137 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4018 event pairs, 98 based on Foata normal form. 2/814 useless extension candidates. Maximal degree in co-relation 6461. Up to 450 conditions per place. [2025-02-06 04:34:09,956 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 47 changer transitions 7/166 dead transitions. [2025-02-06 04:34:09,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 166 transitions, 2400 flow [2025-02-06 04:34:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:34:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:34:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2025-02-06 04:34:09,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2025-02-06 04:34:09,957 INFO L175 Difference]: Start difference. First operand has 191 places, 148 transitions, 1903 flow. Second operand 9 states and 71 transitions. [2025-02-06 04:34:09,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 166 transitions, 2400 flow [2025-02-06 04:34:09,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 166 transitions, 2241 flow, removed 33 selfloop flow, removed 18 redundant places. [2025-02-06 04:34:09,990 INFO L231 Difference]: Finished difference. Result has 182 places, 148 transitions, 1850 flow [2025-02-06 04:34:09,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1850, PETRI_PLACES=182, PETRI_TRANSITIONS=148} [2025-02-06 04:34:09,990 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2025-02-06 04:34:09,990 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 148 transitions, 1850 flow [2025-02-06 04:34:09,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:09,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:09,990 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:09,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:10,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,191 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:10,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1966417162, now seen corresponding path program 33 times [2025-02-06 04:34:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:10,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540444203] [2025-02-06 04:34:10,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:10,199 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:10,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 28 statements. [2025-02-06 04:34:10,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:34:10,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540444203] [2025-02-06 04:34:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540444203] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105949952] [2025-02-06 04:34:10,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:10,597 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:10,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-02-06 04:34:10,716 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:10,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 28 statements. [2025-02-06 04:34:10,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:34:10,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:10,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-06 04:34:10,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:10,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:10,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2025-02-06 04:34:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:10,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:11,129 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:11,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:11,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105949952] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:11,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:11,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-02-06 04:34:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178638443] [2025-02-06 04:34:11,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:11,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:34:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:11,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:34:11,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:34:11,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:11,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 148 transitions, 1850 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:11,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:11,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:11,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:11,950 INFO L124 PetriNetUnfolderBase]: 446/877 cut-off events. [2025-02-06 04:34:11,950 INFO L125 PetriNetUnfolderBase]: For 19117/19117 co-relation queries the response was YES. [2025-02-06 04:34:11,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 877 events. 446/877 cut-off events. For 19117/19117 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4503 event pairs, 94 based on Foata normal form. 11/888 useless extension candidates. Maximal degree in co-relation 6965. Up to 682 conditions per place. [2025-02-06 04:34:11,956 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 151 selfloop transitions, 38 changer transitions 4/194 dead transitions. [2025-02-06 04:34:11,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 194 transitions, 2715 flow [2025-02-06 04:34:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 04:34:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 04:34:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 138 transitions. [2025-02-06 04:34:11,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-02-06 04:34:11,957 INFO L175 Difference]: Start difference. First operand has 182 places, 148 transitions, 1850 flow. Second operand 18 states and 138 transitions. [2025-02-06 04:34:11,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 194 transitions, 2715 flow [2025-02-06 04:34:11,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 194 transitions, 2584 flow, removed 9 selfloop flow, removed 8 redundant places. [2025-02-06 04:34:12,003 INFO L231 Difference]: Finished difference. Result has 194 places, 154 transitions, 1994 flow [2025-02-06 04:34:12,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1994, PETRI_PLACES=194, PETRI_TRANSITIONS=154} [2025-02-06 04:34:12,003 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2025-02-06 04:34:12,004 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 154 transitions, 1994 flow [2025-02-06 04:34:12,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:12,004 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:12,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-02-06 04:34:12,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:12,204 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:12,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1378240112, now seen corresponding path program 34 times [2025-02-06 04:34:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:12,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868294230] [2025-02-06 04:34:12,205 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:12,212 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:12,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:12,223 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:12,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868294230] [2025-02-06 04:34:12,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868294230] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458262146] [2025-02-06 04:34:12,488 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:12,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:12,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:12,490 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:12,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-02-06 04:34:12,608 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:12,631 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:12,631 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:12,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:12,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:12,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:12,685 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 04:34:12,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-06 04:34:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:12,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:12,779 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:12,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:34:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:12,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458262146] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:12,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:12,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:34:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610786595] [2025-02-06 04:34:12,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:12,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:34:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:12,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:34:12,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:34:12,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:12,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 154 transitions, 1994 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:12,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:12,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:12,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:13,038 INFO L124 PetriNetUnfolderBase]: 448/877 cut-off events. [2025-02-06 04:34:13,038 INFO L125 PetriNetUnfolderBase]: For 20245/20245 co-relation queries the response was YES. [2025-02-06 04:34:13,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7211 conditions, 877 events. 448/877 cut-off events. For 20245/20245 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4475 event pairs, 172 based on Foata normal form. 5/882 useless extension candidates. Maximal degree in co-relation 7104. Up to 764 conditions per place. [2025-02-06 04:34:13,044 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 145 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2025-02-06 04:34:13,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 169 transitions, 2498 flow [2025-02-06 04:34:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:34:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:34:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2025-02-06 04:34:13,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2025-02-06 04:34:13,045 INFO L175 Difference]: Start difference. First operand has 194 places, 154 transitions, 1994 flow. Second operand 9 states and 68 transitions. [2025-02-06 04:34:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 169 transitions, 2498 flow [2025-02-06 04:34:13,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 169 transitions, 2350 flow, removed 51 selfloop flow, removed 11 redundant places. [2025-02-06 04:34:13,078 INFO L231 Difference]: Finished difference. Result has 192 places, 155 transitions, 1933 flow [2025-02-06 04:34:13,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1933, PETRI_PLACES=192, PETRI_TRANSITIONS=155} [2025-02-06 04:34:13,079 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2025-02-06 04:34:13,079 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 155 transitions, 1933 flow [2025-02-06 04:34:13,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:13,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:13,079 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:13,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-02-06 04:34:13,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:13,280 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:13,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1099812234, now seen corresponding path program 35 times [2025-02-06 04:34:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:13,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942498256] [2025-02-06 04:34:13,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:13,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:13,288 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:13,301 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:13,302 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:13,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:34:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:13,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942498256] [2025-02-06 04:34:13,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942498256] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:13,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448452029] [2025-02-06 04:34:13,596 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:13,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:13,598 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:13,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-02-06 04:34:13,718 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:13,849 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:13,849 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:13,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:13,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 04:34:13,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:13,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:14,054 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:14,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448452029] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:14,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2025-02-06 04:34:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68297949] [2025-02-06 04:34:14,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:14,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 04:34:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:14,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 04:34:14,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2025-02-06 04:34:14,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:14,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 155 transitions, 1933 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:14,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:14,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:14,360 INFO L124 PetriNetUnfolderBase]: 442/855 cut-off events. [2025-02-06 04:34:14,360 INFO L125 PetriNetUnfolderBase]: For 19039/19039 co-relation queries the response was YES. [2025-02-06 04:34:14,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6946 conditions, 855 events. 442/855 cut-off events. For 19039/19039 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4314 event pairs, 167 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 6839. Up to 747 conditions per place. [2025-02-06 04:34:14,366 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 131 selfloop transitions, 26 changer transitions 4/162 dead transitions. [2025-02-06 04:34:14,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 162 transitions, 2292 flow [2025-02-06 04:34:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 67 transitions. [2025-02-06 04:34:14,367 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30454545454545456 [2025-02-06 04:34:14,367 INFO L175 Difference]: Start difference. First operand has 192 places, 155 transitions, 1933 flow. Second operand 10 states and 67 transitions. [2025-02-06 04:34:14,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 162 transitions, 2292 flow [2025-02-06 04:34:14,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 162 transitions, 2222 flow, removed 13 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:14,405 INFO L231 Difference]: Finished difference. Result has 194 places, 152 transitions, 1874 flow [2025-02-06 04:34:14,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1874, PETRI_PLACES=194, PETRI_TRANSITIONS=152} [2025-02-06 04:34:14,405 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2025-02-06 04:34:14,405 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 152 transitions, 1874 flow [2025-02-06 04:34:14,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:14,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:14,405 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:14,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-02-06 04:34:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:14,606 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:14,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash -439751896, now seen corresponding path program 36 times [2025-02-06 04:34:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254929379] [2025-02-06 04:34:14,607 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:14,614 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:14,620 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:34:14,621 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:14,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:14,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254929379] [2025-02-06 04:34:14,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254929379] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930409357] [2025-02-06 04:34:14,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:14,894 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:14,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-02-06 04:34:15,014 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:15,031 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:34:15,032 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:15,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:15,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:34:15,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:15,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:15,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:34:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:15,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:15,314 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:34:15,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:34:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930409357] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:15,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-02-06 04:34:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822336062] [2025-02-06 04:34:15,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:15,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:34:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:15,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:34:15,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:34:15,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:15,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 152 transitions, 1874 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:15,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:15,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:15,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:15,904 INFO L124 PetriNetUnfolderBase]: 436/845 cut-off events. [2025-02-06 04:34:15,904 INFO L125 PetriNetUnfolderBase]: For 19067/19067 co-relation queries the response was YES. [2025-02-06 04:34:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6802 conditions, 845 events. 436/845 cut-off events. For 19067/19067 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4269 event pairs, 94 based on Foata normal form. 4/849 useless extension candidates. Maximal degree in co-relation 6692. Up to 475 conditions per place. [2025-02-06 04:34:15,910 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 126 selfloop transitions, 56 changer transitions 6/189 dead transitions. [2025-02-06 04:34:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 189 transitions, 2651 flow [2025-02-06 04:34:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:34:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:34:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 107 transitions. [2025-02-06 04:34:15,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2025-02-06 04:34:15,911 INFO L175 Difference]: Start difference. First operand has 194 places, 152 transitions, 1874 flow. Second operand 13 states and 107 transitions. [2025-02-06 04:34:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 189 transitions, 2651 flow [2025-02-06 04:34:15,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 2597 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:15,948 INFO L231 Difference]: Finished difference. Result has 196 places, 153 transitions, 1972 flow [2025-02-06 04:34:15,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1972, PETRI_PLACES=196, PETRI_TRANSITIONS=153} [2025-02-06 04:34:15,948 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 174 predicate places. [2025-02-06 04:34:15,948 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 153 transitions, 1972 flow [2025-02-06 04:34:15,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:15,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:15,948 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:15,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:16,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2025-02-06 04:34:16,149 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:16,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:16,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1450058728, now seen corresponding path program 37 times [2025-02-06 04:34:16,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:16,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135941736] [2025-02-06 04:34:16,150 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:16,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:16,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:16,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:16,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:16,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 04:34:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135941736] [2025-02-06 04:34:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135941736] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929403237] [2025-02-06 04:34:16,702 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:16,704 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-02-06 04:34:16,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:16,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:16,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:16,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:16,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:16,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:16,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:16,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:34:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:16,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:17,025 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:17,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-02-06 04:34:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929403237] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:17,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2025-02-06 04:34:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695614577] [2025-02-06 04:34:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:17,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 04:34:17,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:17,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 04:34:17,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-02-06 04:34:17,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:17,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 153 transitions, 1972 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:17,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:17,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:17,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:17,425 INFO L124 PetriNetUnfolderBase]: 424/809 cut-off events. [2025-02-06 04:34:17,425 INFO L125 PetriNetUnfolderBase]: For 17720/17720 co-relation queries the response was YES. [2025-02-06 04:34:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6672 conditions, 809 events. 424/809 cut-off events. For 17720/17720 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3925 event pairs, 148 based on Foata normal form. 2/811 useless extension candidates. Maximal degree in co-relation 6564. Up to 681 conditions per place. [2025-02-06 04:34:17,430 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 127 selfloop transitions, 38 changer transitions 2/168 dead transitions. [2025-02-06 04:34:17,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 168 transitions, 2432 flow [2025-02-06 04:34:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:34:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:34:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 106 transitions. [2025-02-06 04:34:17,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30113636363636365 [2025-02-06 04:34:17,431 INFO L175 Difference]: Start difference. First operand has 196 places, 153 transitions, 1972 flow. Second operand 16 states and 106 transitions. [2025-02-06 04:34:17,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 168 transitions, 2432 flow [2025-02-06 04:34:17,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 168 transitions, 2161 flow, removed 48 selfloop flow, removed 18 redundant places. [2025-02-06 04:34:17,461 INFO L231 Difference]: Finished difference. Result has 190 places, 150 transitions, 1756 flow [2025-02-06 04:34:17,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1756, PETRI_PLACES=190, PETRI_TRANSITIONS=150} [2025-02-06 04:34:17,462 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2025-02-06 04:34:17,462 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 150 transitions, 1756 flow [2025-02-06 04:34:17,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:17,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:17,462 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:17,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-02-06 04:34:17,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-02-06 04:34:17,663 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:17,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1354326580, now seen corresponding path program 38 times [2025-02-06 04:34:17,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:17,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437224777] [2025-02-06 04:34:17,663 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:17,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:17,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:17,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:17,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:17,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437224777] [2025-02-06 04:34:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437224777] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609699005] [2025-02-06 04:34:18,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:18,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:18,090 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:18,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-02-06 04:34:18,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:18,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:18,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:18,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:18,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:18,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:18,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:18,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2025-02-06 04:34:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:18,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:18,448 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2025-02-06 04:34:18,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2025-02-06 04:34:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:18,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609699005] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:18,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:18,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:18,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555742045] [2025-02-06 04:34:18,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:18,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:18,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:18,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:18,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:18,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 150 transitions, 1756 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:18,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:18,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:18,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:18,822 INFO L124 PetriNetUnfolderBase]: 418/793 cut-off events. [2025-02-06 04:34:18,822 INFO L125 PetriNetUnfolderBase]: For 15855/15855 co-relation queries the response was YES. [2025-02-06 04:34:18,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 793 events. 418/793 cut-off events. For 15855/15855 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3810 event pairs, 96 based on Foata normal form. 5/798 useless extension candidates. Maximal degree in co-relation 6084. Up to 475 conditions per place. [2025-02-06 04:34:18,827 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 113 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2025-02-06 04:34:18,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 166 transitions, 2216 flow [2025-02-06 04:34:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:34:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:34:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2025-02-06 04:34:18,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2025-02-06 04:34:18,828 INFO L175 Difference]: Start difference. First operand has 190 places, 150 transitions, 1756 flow. Second operand 9 states and 74 transitions. [2025-02-06 04:34:18,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 166 transitions, 2216 flow [2025-02-06 04:34:18,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 166 transitions, 2132 flow, removed 4 selfloop flow, removed 15 redundant places. [2025-02-06 04:34:18,853 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1769 flow [2025-02-06 04:34:18,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1769, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2025-02-06 04:34:18,854 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 159 predicate places. [2025-02-06 04:34:18,854 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1769 flow [2025-02-06 04:34:18,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:18,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:18,854 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:18,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-02-06 04:34:19,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-02-06 04:34:19,054 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:19,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash -610801074, now seen corresponding path program 39 times [2025-02-06 04:34:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:19,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693953297] [2025-02-06 04:34:19,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:19,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:19,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:34:19,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:19,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:19,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693953297] [2025-02-06 04:34:19,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693953297] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540620485] [2025-02-06 04:34:19,354 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:19,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:19,356 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:19,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-02-06 04:34:19,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:19,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 28 statements. [2025-02-06 04:34:19,499 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:19,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:19,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:34:19,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:19,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:19,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:34:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:19,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:19,650 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:19,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:19,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540620485] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:19,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:19,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:19,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656182802] [2025-02-06 04:34:19,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:19,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:19,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:19,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:19,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:19,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1769 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:19,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:19,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:19,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:20,022 INFO L124 PetriNetUnfolderBase]: 412/771 cut-off events. [2025-02-06 04:34:20,022 INFO L125 PetriNetUnfolderBase]: For 15122/15122 co-relation queries the response was YES. [2025-02-06 04:34:20,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6129 conditions, 771 events. 412/771 cut-off events. For 15122/15122 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3622 event pairs, 139 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 6029. Up to 652 conditions per place. [2025-02-06 04:34:20,027 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 129 selfloop transitions, 27 changer transitions 2/159 dead transitions. [2025-02-06 04:34:20,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 159 transitions, 2155 flow [2025-02-06 04:34:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 71 transitions. [2025-02-06 04:34:20,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32272727272727275 [2025-02-06 04:34:20,028 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1769 flow. Second operand 10 states and 71 transitions. [2025-02-06 04:34:20,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 159 transitions, 2155 flow [2025-02-06 04:34:20,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 159 transitions, 2045 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:20,056 INFO L231 Difference]: Finished difference. Result has 179 places, 146 transitions, 1687 flow [2025-02-06 04:34:20,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1687, PETRI_PLACES=179, PETRI_TRANSITIONS=146} [2025-02-06 04:34:20,056 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2025-02-06 04:34:20,056 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 146 transitions, 1687 flow [2025-02-06 04:34:20,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:20,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:20,057 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:20,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-02-06 04:34:20,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-02-06 04:34:20,257 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:20,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash -951304409, now seen corresponding path program 40 times [2025-02-06 04:34:20,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:20,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501882258] [2025-02-06 04:34:20,258 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:20,265 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:20,275 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:20,275 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:20,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501882258] [2025-02-06 04:34:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501882258] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79777753] [2025-02-06 04:34:20,589 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:20,591 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:20,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-02-06 04:34:20,733 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 04:34:20,757 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:20,757 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:20,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:20,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:34:20,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:20,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:20,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:34:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:20,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:20,935 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-02-06 04:34:20,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2025-02-06 04:34:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79777753] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:20,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 04:34:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610354103] [2025-02-06 04:34:20,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:20,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:34:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:20,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:34:20,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:34:20,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:20,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 146 transitions, 1687 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:20,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:20,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:21,303 INFO L124 PetriNetUnfolderBase]: 400/739 cut-off events. [2025-02-06 04:34:21,303 INFO L125 PetriNetUnfolderBase]: For 13893/13893 co-relation queries the response was YES. [2025-02-06 04:34:21,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 739 events. 400/739 cut-off events. For 13893/13893 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3398 event pairs, 133 based on Foata normal form. 3/742 useless extension candidates. Maximal degree in co-relation 5700. Up to 626 conditions per place. [2025-02-06 04:34:21,307 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 126 selfloop transitions, 27 changer transitions 3/157 dead transitions. [2025-02-06 04:34:21,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 157 transitions, 2113 flow [2025-02-06 04:34:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:34:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:34:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 71 transitions. [2025-02-06 04:34:21,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32272727272727275 [2025-02-06 04:34:21,307 INFO L175 Difference]: Start difference. First operand has 179 places, 146 transitions, 1687 flow. Second operand 10 states and 71 transitions. [2025-02-06 04:34:21,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 157 transitions, 2113 flow [2025-02-06 04:34:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 157 transitions, 2057 flow, removed 1 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:21,331 INFO L231 Difference]: Finished difference. Result has 175 places, 144 transitions, 1670 flow [2025-02-06 04:34:21,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1670, PETRI_PLACES=175, PETRI_TRANSITIONS=144} [2025-02-06 04:34:21,332 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2025-02-06 04:34:21,332 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 144 transitions, 1670 flow [2025-02-06 04:34:21,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:21,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:21,332 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:21,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-02-06 04:34:21,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-02-06 04:34:21,532 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:21,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash -77742993, now seen corresponding path program 41 times [2025-02-06 04:34:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:21,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427761886] [2025-02-06 04:34:21,533 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:21,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:21,541 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:21,557 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:21,557 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:21,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:34:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427761886] [2025-02-06 04:34:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427761886] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596938536] [2025-02-06 04:34:21,872 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:21,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:21,874 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:21,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-02-06 04:34:22,005 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:22,173 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:22,173 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:22,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:22,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 04:34:22,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:22,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:34:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:22,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596938536] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:22,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:22,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 25 [2025-02-06 04:34:22,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339120380] [2025-02-06 04:34:22,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:22,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 04:34:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:22,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 04:34:22,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2025-02-06 04:34:22,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:22,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 144 transitions, 1670 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:22,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:22,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:22,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:22,952 INFO L124 PetriNetUnfolderBase]: 508/934 cut-off events. [2025-02-06 04:34:22,952 INFO L125 PetriNetUnfolderBase]: For 17079/17079 co-relation queries the response was YES. [2025-02-06 04:34:22,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7780 conditions, 934 events. 508/934 cut-off events. For 17079/17079 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4592 event pairs, 25 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 7682. Up to 327 conditions per place. [2025-02-06 04:34:22,961 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 125 selfloop transitions, 69 changer transitions 0/195 dead transitions. [2025-02-06 04:34:22,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 195 transitions, 2849 flow [2025-02-06 04:34:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:34:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:34:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 106 transitions. [2025-02-06 04:34:22,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2025-02-06 04:34:22,962 INFO L175 Difference]: Start difference. First operand has 175 places, 144 transitions, 1670 flow. Second operand 14 states and 106 transitions. [2025-02-06 04:34:22,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 195 transitions, 2849 flow [2025-02-06 04:34:22,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 195 transitions, 2795 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 04:34:22,992 INFO L231 Difference]: Finished difference. Result has 183 places, 156 transitions, 2087 flow [2025-02-06 04:34:22,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2087, PETRI_PLACES=183, PETRI_TRANSITIONS=156} [2025-02-06 04:34:22,992 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2025-02-06 04:34:22,992 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 156 transitions, 2087 flow [2025-02-06 04:34:22,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:22,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:22,996 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:23,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-02-06 04:34:23,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:23,196 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:23,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash 747573283, now seen corresponding path program 42 times [2025-02-06 04:34:23,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:23,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66298025] [2025-02-06 04:34:23,197 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:23,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:23,205 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:23,212 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:34:23,212 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:23,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66298025] [2025-02-06 04:34:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66298025] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111396334] [2025-02-06 04:34:23,493 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:23,494 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-02-06 04:34:23,629 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-06 04:34:23,647 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 04:34:23,647 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:23,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:23,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:34:23,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:23,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:23,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 04:34:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:23,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:23,896 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:34:23,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:34:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111396334] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:23,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-02-06 04:34:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726387198] [2025-02-06 04:34:23,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:23,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:34:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:23,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:34:23,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:34:23,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 156 transitions, 2087 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:23,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:23,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:23,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:24,473 INFO L124 PetriNetUnfolderBase]: 491/899 cut-off events. [2025-02-06 04:34:24,473 INFO L125 PetriNetUnfolderBase]: For 17146/17146 co-relation queries the response was YES. [2025-02-06 04:34:24,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7790 conditions, 899 events. 491/899 cut-off events. For 17146/17146 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4352 event pairs, 17 based on Foata normal form. 9/908 useless extension candidates. Maximal degree in co-relation 7684. Up to 453 conditions per place. [2025-02-06 04:34:24,479 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 123 selfloop transitions, 63 changer transitions 3/190 dead transitions. [2025-02-06 04:34:24,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 190 transitions, 2889 flow [2025-02-06 04:34:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:34:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:34:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2025-02-06 04:34:24,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2025-02-06 04:34:24,480 INFO L175 Difference]: Start difference. First operand has 183 places, 156 transitions, 2087 flow. Second operand 16 states and 119 transitions. [2025-02-06 04:34:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 190 transitions, 2889 flow [2025-02-06 04:34:24,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 190 transitions, 2779 flow, removed 19 selfloop flow, removed 7 redundant places. [2025-02-06 04:34:24,512 INFO L231 Difference]: Finished difference. Result has 190 places, 152 transitions, 2045 flow [2025-02-06 04:34:24,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2045, PETRI_PLACES=190, PETRI_TRANSITIONS=152} [2025-02-06 04:34:24,512 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2025-02-06 04:34:24,512 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 152 transitions, 2045 flow [2025-02-06 04:34:24,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:24,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:24,512 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:24,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-02-06 04:34:24,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:24,713 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:24,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash -212567167, now seen corresponding path program 43 times [2025-02-06 04:34:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650647705] [2025-02-06 04:34:24,713 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:24,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:24,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:24,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:24,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:25,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:25,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650647705] [2025-02-06 04:34:25,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650647705] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:25,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548700925] [2025-02-06 04:34:25,012 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:25,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:25,015 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:25,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-02-06 04:34:25,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 04:34:25,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 04:34:25,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:25,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:25,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:34:25,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:25,241 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 04:34:25,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-06 04:34:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:25,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:25,339 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 04:34:25,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 04:34:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548700925] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:25,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-02-06 04:34:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297397496] [2025-02-06 04:34:25,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:25,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:34:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:25,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:34:25,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:34:25,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:25,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 152 transitions, 2045 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:25,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:25,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:25,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:25,644 INFO L124 PetriNetUnfolderBase]: 504/907 cut-off events. [2025-02-06 04:34:25,644 INFO L125 PetriNetUnfolderBase]: For 17238/17238 co-relation queries the response was YES. [2025-02-06 04:34:25,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8164 conditions, 907 events. 504/907 cut-off events. For 17238/17238 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4368 event pairs, 21 based on Foata normal form. 8/915 useless extension candidates. Maximal degree in co-relation 8060. Up to 505 conditions per place. [2025-02-06 04:34:25,650 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 116 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2025-02-06 04:34:25,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 179 transitions, 2873 flow [2025-02-06 04:34:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:34:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:34:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-02-06 04:34:25,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 04:34:25,650 INFO L175 Difference]: Start difference. First operand has 190 places, 152 transitions, 2045 flow. Second operand 12 states and 88 transitions. [2025-02-06 04:34:25,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 179 transitions, 2873 flow [2025-02-06 04:34:25,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 179 transitions, 2768 flow, removed 6 selfloop flow, removed 13 redundant places. [2025-02-06 04:34:25,681 INFO L231 Difference]: Finished difference. Result has 186 places, 156 transitions, 2192 flow [2025-02-06 04:34:25,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2192, PETRI_PLACES=186, PETRI_TRANSITIONS=156} [2025-02-06 04:34:25,682 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2025-02-06 04:34:25,682 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 156 transitions, 2192 flow [2025-02-06 04:34:25,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:25,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:25,682 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:25,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:25,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:25,882 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:25,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1749835468, now seen corresponding path program 44 times [2025-02-06 04:34:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913705941] [2025-02-06 04:34:25,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:25,890 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:25,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:25,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:25,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 04:34:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:26,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913705941] [2025-02-06 04:34:26,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913705941] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:26,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705155930] [2025-02-06 04:34:26,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:26,318 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:26,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-02-06 04:34:26,459 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:26,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:26,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:26,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:26,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:26,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:26,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:26,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:26,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:26,853 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-02-06 04:34:26,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2025-02-06 04:34:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705155930] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:26,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:26,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2025-02-06 04:34:26,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863303450] [2025-02-06 04:34:26,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:26,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 04:34:26,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:26,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 04:34:26,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2025-02-06 04:34:26,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:26,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 156 transitions, 2192 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:26,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:26,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:26,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:27,523 INFO L124 PetriNetUnfolderBase]: 636/1143 cut-off events. [2025-02-06 04:34:27,523 INFO L125 PetriNetUnfolderBase]: For 23120/23120 co-relation queries the response was YES. [2025-02-06 04:34:27,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10223 conditions, 1143 events. 636/1143 cut-off events. For 23120/23120 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5821 event pairs, 54 based on Foata normal form. 1/1144 useless extension candidates. Maximal degree in co-relation 10118. Up to 422 conditions per place. [2025-02-06 04:34:27,530 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 135 selfloop transitions, 79 changer transitions 3/218 dead transitions. [2025-02-06 04:34:27,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 218 transitions, 3475 flow [2025-02-06 04:34:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 04:34:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-06 04:34:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2025-02-06 04:34:27,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34759358288770054 [2025-02-06 04:34:27,531 INFO L175 Difference]: Start difference. First operand has 186 places, 156 transitions, 2192 flow. Second operand 17 states and 130 transitions. [2025-02-06 04:34:27,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 218 transitions, 3475 flow [2025-02-06 04:34:27,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 218 transitions, 3265 flow, removed 10 selfloop flow, removed 10 redundant places. [2025-02-06 04:34:27,573 INFO L231 Difference]: Finished difference. Result has 197 places, 168 transitions, 2454 flow [2025-02-06 04:34:27,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2454, PETRI_PLACES=197, PETRI_TRANSITIONS=168} [2025-02-06 04:34:27,574 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2025-02-06 04:34:27,574 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 168 transitions, 2454 flow [2025-02-06 04:34:27,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:27,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:27,574 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:27,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-02-06 04:34:27,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2025-02-06 04:34:27,775 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:27,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash -931461086, now seen corresponding path program 45 times [2025-02-06 04:34:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034866096] [2025-02-06 04:34:27,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:27,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:27,789 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-02-06 04:34:27,789 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:27,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:28,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034866096] [2025-02-06 04:34:28,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034866096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031485517] [2025-02-06 04:34:28,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:28,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:28,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:28,051 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:28,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-02-06 04:34:28,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:28,205 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 29 statements. [2025-02-06 04:34:28,206 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:34:28,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:28,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:28,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:28,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:28,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:28,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:28,573 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-02-06 04:34:28,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-02-06 04:34:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031485517] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:28,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:28,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2025-02-06 04:34:28,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115447154] [2025-02-06 04:34:28,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:28,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-06 04:34:28,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:28,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-06 04:34:28,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2025-02-06 04:34:28,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:28,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 168 transitions, 2454 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:28,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:28,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:28,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:29,257 INFO L124 PetriNetUnfolderBase]: 652/1173 cut-off events. [2025-02-06 04:34:29,257 INFO L125 PetriNetUnfolderBase]: For 25425/25425 co-relation queries the response was YES. [2025-02-06 04:34:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10740 conditions, 1173 events. 652/1173 cut-off events. For 25425/25425 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6058 event pairs, 70 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 10626. Up to 744 conditions per place. [2025-02-06 04:34:29,265 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 131 selfloop transitions, 72 changer transitions 2/206 dead transitions. [2025-02-06 04:34:29,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 206 transitions, 3379 flow [2025-02-06 04:34:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:34:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:34:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-02-06 04:34:29,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-02-06 04:34:29,266 INFO L175 Difference]: Start difference. First operand has 197 places, 168 transitions, 2454 flow. Second operand 14 states and 110 transitions. [2025-02-06 04:34:29,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 206 transitions, 3379 flow [2025-02-06 04:34:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 206 transitions, 3143 flow, removed 55 selfloop flow, removed 10 redundant places. [2025-02-06 04:34:29,314 INFO L231 Difference]: Finished difference. Result has 204 places, 179 transitions, 2619 flow [2025-02-06 04:34:29,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2619, PETRI_PLACES=204, PETRI_TRANSITIONS=179} [2025-02-06 04:34:29,315 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 182 predicate places. [2025-02-06 04:34:29,315 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 179 transitions, 2619 flow [2025-02-06 04:34:29,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:29,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:29,315 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:29,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-02-06 04:34:29,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:29,516 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:29,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 428905728, now seen corresponding path program 46 times [2025-02-06 04:34:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512099950] [2025-02-06 04:34:29,516 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:29,523 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:29,534 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:29,534 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:29,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 04:34:29,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512099950] [2025-02-06 04:34:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512099950] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616702534] [2025-02-06 04:34:29,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:29,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:29,988 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:29,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-02-06 04:34:30,129 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:30,152 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:30,152 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:30,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:30,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:30,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:30,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:30,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:30,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:30,493 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:34:30,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:34:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:30,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616702534] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:30,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:30,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2025-02-06 04:34:30,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835699010] [2025-02-06 04:34:30,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:30,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 04:34:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:30,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 04:34:30,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2025-02-06 04:34:30,558 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:30,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 179 transitions, 2619 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:30,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:30,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:31,427 INFO L124 PetriNetUnfolderBase]: 726/1313 cut-off events. [2025-02-06 04:34:31,427 INFO L125 PetriNetUnfolderBase]: For 32485/32485 co-relation queries the response was YES. [2025-02-06 04:34:31,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12234 conditions, 1313 events. 726/1313 cut-off events. For 32485/32485 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6859 event pairs, 72 based on Foata normal form. 4/1317 useless extension candidates. Maximal degree in co-relation 12122. Up to 786 conditions per place. [2025-02-06 04:34:31,437 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 155 selfloop transitions, 90 changer transitions 5/251 dead transitions. [2025-02-06 04:34:31,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 251 transitions, 4161 flow [2025-02-06 04:34:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 04:34:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 04:34:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 186 transitions. [2025-02-06 04:34:31,438 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2025-02-06 04:34:31,438 INFO L175 Difference]: Start difference. First operand has 204 places, 179 transitions, 2619 flow. Second operand 24 states and 186 transitions. [2025-02-06 04:34:31,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 251 transitions, 4161 flow [2025-02-06 04:34:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 251 transitions, 3836 flow, removed 95 selfloop flow, removed 9 redundant places. [2025-02-06 04:34:31,514 INFO L231 Difference]: Finished difference. Result has 226 places, 196 transitions, 2985 flow [2025-02-06 04:34:31,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2985, PETRI_PLACES=226, PETRI_TRANSITIONS=196} [2025-02-06 04:34:31,514 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 204 predicate places. [2025-02-06 04:34:31,514 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 196 transitions, 2985 flow [2025-02-06 04:34:31,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:31,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:31,515 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:31,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-02-06 04:34:31,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2025-02-06 04:34:31,715 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:31,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1962866624, now seen corresponding path program 47 times [2025-02-06 04:34:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:31,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006248388] [2025-02-06 04:34:31,716 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:31,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:31,724 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:31,741 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:31,741 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:31,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:34:32,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:32,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006248388] [2025-02-06 04:34:32,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006248388] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:32,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780616033] [2025-02-06 04:34:32,494 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:34:32,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:32,495 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:32,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-02-06 04:34:32,642 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:32,722 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:32,722 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-06 04:34:32,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:32,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-06 04:34:32,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:32,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-06 04:34:32,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:32,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-02-06 04:34:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 04:34:32,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:33,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780616033] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:33,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:33,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 43 [2025-02-06 04:34:33,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959292453] [2025-02-06 04:34:33,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:33,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-06 04:34:33,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:33,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-06 04:34:33,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2025-02-06 04:34:33,738 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:33,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 196 transitions, 2985 flow. Second operand has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:33,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:33,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:33,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:35,151 INFO L124 PetriNetUnfolderBase]: 768/1390 cut-off events. [2025-02-06 04:34:35,151 INFO L125 PetriNetUnfolderBase]: For 39513/39513 co-relation queries the response was YES. [2025-02-06 04:34:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13370 conditions, 1390 events. 768/1390 cut-off events. For 39513/39513 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7395 event pairs, 84 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 13247. Up to 873 conditions per place. [2025-02-06 04:34:35,161 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 156 selfloop transitions, 96 changer transitions 5/258 dead transitions. [2025-02-06 04:34:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 258 transitions, 4478 flow [2025-02-06 04:34:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:34:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:34:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 184 transitions. [2025-02-06 04:34:35,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33454545454545453 [2025-02-06 04:34:35,162 INFO L175 Difference]: Start difference. First operand has 226 places, 196 transitions, 2985 flow. Second operand 25 states and 184 transitions. [2025-02-06 04:34:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 258 transitions, 4478 flow [2025-02-06 04:34:35,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 258 transitions, 4157 flow, removed 96 selfloop flow, removed 15 redundant places. [2025-02-06 04:34:35,246 INFO L231 Difference]: Finished difference. Result has 240 places, 207 transitions, 3245 flow [2025-02-06 04:34:35,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3245, PETRI_PLACES=240, PETRI_TRANSITIONS=207} [2025-02-06 04:34:35,246 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 218 predicate places. [2025-02-06 04:34:35,246 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 207 transitions, 3245 flow [2025-02-06 04:34:35,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:35,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:35,246 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:35,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2025-02-06 04:34:35,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,50 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:35,447 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:35,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1805201766, now seen corresponding path program 48 times [2025-02-06 04:34:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:35,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218214816] [2025-02-06 04:34:35,448 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:35,455 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:35,466 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-02-06 04:34:35,466 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:35,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:35,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218214816] [2025-02-06 04:34:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218214816] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91912431] [2025-02-06 04:34:35,779 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:34:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:35,780 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:35,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-02-06 04:34:35,929 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:35,947 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 29 statements. [2025-02-06 04:34:35,948 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:34:35,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:35,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:35,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:36,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:36,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:36,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:36,362 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-02-06 04:34:36,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2025-02-06 04:34:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91912431] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:36,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2025-02-06 04:34:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252105969] [2025-02-06 04:34:36,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:36,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-06 04:34:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:36,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-06 04:34:36,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2025-02-06 04:34:36,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:36,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 207 transitions, 3245 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:36,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:36,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:36,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:36,976 INFO L124 PetriNetUnfolderBase]: 772/1401 cut-off events. [2025-02-06 04:34:36,976 INFO L125 PetriNetUnfolderBase]: For 42639/42639 co-relation queries the response was YES. [2025-02-06 04:34:36,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13646 conditions, 1401 events. 772/1401 cut-off events. For 42639/42639 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7486 event pairs, 102 based on Foata normal form. 1/1402 useless extension candidates. Maximal degree in co-relation 13516. Up to 954 conditions per place. [2025-02-06 04:34:36,989 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 158 selfloop transitions, 75 changer transitions 3/237 dead transitions. [2025-02-06 04:34:36,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 237 transitions, 4176 flow [2025-02-06 04:34:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:34:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:34:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-02-06 04:34:36,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-02-06 04:34:36,989 INFO L175 Difference]: Start difference. First operand has 240 places, 207 transitions, 3245 flow. Second operand 14 states and 110 transitions. [2025-02-06 04:34:36,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 237 transitions, 4176 flow [2025-02-06 04:34:37,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 237 transitions, 3873 flow, removed 75 selfloop flow, removed 19 redundant places. [2025-02-06 04:34:37,097 INFO L231 Difference]: Finished difference. Result has 237 places, 209 transitions, 3186 flow [2025-02-06 04:34:37,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3186, PETRI_PLACES=237, PETRI_TRANSITIONS=209} [2025-02-06 04:34:37,097 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2025-02-06 04:34:37,098 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 209 transitions, 3186 flow [2025-02-06 04:34:37,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:37,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:37,098 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:37,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-02-06 04:34:37,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:37,298 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:37,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1457806464, now seen corresponding path program 49 times [2025-02-06 04:34:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:37,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603158975] [2025-02-06 04:34:37,299 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:37,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:37,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 04:34:37,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:37,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:37,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 04:34:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603158975] [2025-02-06 04:34:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603158975] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571442895] [2025-02-06 04:34:37,761 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:34:37,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:37,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:37,763 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:37,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-02-06 04:34:37,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 04:34:37,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:37,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:34:37,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:37,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:37,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:37,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:37,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:38,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:38,313 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-02-06 04:34:38,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-02-06 04:34:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571442895] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:38,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2025-02-06 04:34:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838866350] [2025-02-06 04:34:38,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:38,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 04:34:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:38,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 04:34:38,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2025-02-06 04:34:38,379 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:38,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 209 transitions, 3186 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:38,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:38,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:38,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:39,103 INFO L124 PetriNetUnfolderBase]: 774/1406 cut-off events. [2025-02-06 04:34:39,104 INFO L125 PetriNetUnfolderBase]: For 42916/42916 co-relation queries the response was YES. [2025-02-06 04:34:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13719 conditions, 1406 events. 774/1406 cut-off events. For 42916/42916 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7544 event pairs, 104 based on Foata normal form. 1/1407 useless extension candidates. Maximal degree in co-relation 13592. Up to 953 conditions per place. [2025-02-06 04:34:39,116 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 154 selfloop transitions, 79 changer transitions 4/238 dead transitions. [2025-02-06 04:34:39,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 238 transitions, 4114 flow [2025-02-06 04:34:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 04:34:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-06 04:34:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 122 transitions. [2025-02-06 04:34:39,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32620320855614976 [2025-02-06 04:34:39,117 INFO L175 Difference]: Start difference. First operand has 237 places, 209 transitions, 3186 flow. Second operand 17 states and 122 transitions. [2025-02-06 04:34:39,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 238 transitions, 4114 flow [2025-02-06 04:34:39,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 238 transitions, 3912 flow, removed 30 selfloop flow, removed 12 redundant places. [2025-02-06 04:34:39,221 INFO L231 Difference]: Finished difference. Result has 243 places, 209 transitions, 3209 flow [2025-02-06 04:34:39,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3209, PETRI_PLACES=243, PETRI_TRANSITIONS=209} [2025-02-06 04:34:39,221 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 221 predicate places. [2025-02-06 04:34:39,221 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 209 transitions, 3209 flow [2025-02-06 04:34:39,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:39,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:39,221 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:39,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-02-06 04:34:39,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2025-02-06 04:34:39,422 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:39,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1757110492, now seen corresponding path program 50 times [2025-02-06 04:34:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408421792] [2025-02-06 04:34:39,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:39,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:39,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:39,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:39,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 04:34:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408421792] [2025-02-06 04:34:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408421792] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017706328] [2025-02-06 04:34:39,845 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:34:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:39,847 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:39,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-02-06 04:34:39,998 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:40,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:40,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:34:40,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:40,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:40,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:40,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:40,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:40,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:40,341 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:34:40,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:34:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017706328] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:40,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:40,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2025-02-06 04:34:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184233962] [2025-02-06 04:34:40,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:40,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 04:34:40,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:40,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 04:34:40,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2025-02-06 04:34:40,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:40,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 209 transitions, 3209 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:40,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:40,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:40,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:41,231 INFO L124 PetriNetUnfolderBase]: 840/1527 cut-off events. [2025-02-06 04:34:41,231 INFO L125 PetriNetUnfolderBase]: For 52838/52838 co-relation queries the response was YES. [2025-02-06 04:34:41,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15477 conditions, 1527 events. 840/1527 cut-off events. For 52838/52838 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8300 event pairs, 118 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 15345. Up to 1292 conditions per place. [2025-02-06 04:34:41,245 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 208 selfloop transitions, 51 changer transitions 4/264 dead transitions. [2025-02-06 04:34:41,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 264 transitions, 4847 flow [2025-02-06 04:34:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:34:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:34:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 154 transitions. [2025-02-06 04:34:41,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 04:34:41,246 INFO L175 Difference]: Start difference. First operand has 243 places, 209 transitions, 3209 flow. Second operand 21 states and 154 transitions. [2025-02-06 04:34:41,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 264 transitions, 4847 flow [2025-02-06 04:34:41,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 264 transitions, 4610 flow, removed 41 selfloop flow, removed 16 redundant places. [2025-02-06 04:34:41,368 INFO L231 Difference]: Finished difference. Result has 252 places, 225 transitions, 3776 flow [2025-02-06 04:34:41,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3776, PETRI_PLACES=252, PETRI_TRANSITIONS=225} [2025-02-06 04:34:41,368 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 230 predicate places. [2025-02-06 04:34:41,368 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 225 transitions, 3776 flow [2025-02-06 04:34:41,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:41,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:41,368 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:41,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-02-06 04:34:41,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-02-06 04:34:41,569 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:41,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:41,569 INFO L85 PathProgramCache]: Analyzing trace with hash -633676548, now seen corresponding path program 51 times [2025-02-06 04:34:41,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:41,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50084664] [2025-02-06 04:34:41,569 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:41,577 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:41,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 29 statements. [2025-02-06 04:34:41,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:34:41,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:41,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50084664] [2025-02-06 04:34:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50084664] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092030740] [2025-02-06 04:34:41,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:34:41,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:41,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:41,851 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:41,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-02-06 04:34:42,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-06 04:34:42,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 29 statements. [2025-02-06 04:34:42,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:34:42,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:42,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 04:34:42,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:42,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:42,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-02-06 04:34:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-06 04:34:42,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:42,363 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-02-06 04:34:42,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2025-02-06 04:34:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092030740] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:42,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:42,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2025-02-06 04:34:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244551492] [2025-02-06 04:34:42,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:42,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 04:34:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:42,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 04:34:42,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-02-06 04:34:42,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:42,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 225 transitions, 3776 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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) [2025-02-06 04:34:42,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:42,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:42,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:34:43,072 INFO L124 PetriNetUnfolderBase]: 882/1604 cut-off events. [2025-02-06 04:34:43,073 INFO L125 PetriNetUnfolderBase]: For 57040/57040 co-relation queries the response was YES. [2025-02-06 04:34:43,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16506 conditions, 1604 events. 882/1604 cut-off events. For 57040/57040 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8841 event pairs, 131 based on Foata normal form. 2/1606 useless extension candidates. Maximal degree in co-relation 16370. Up to 1384 conditions per place. [2025-02-06 04:34:43,088 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 213 selfloop transitions, 54 changer transitions 4/272 dead transitions. [2025-02-06 04:34:43,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 272 transitions, 5012 flow [2025-02-06 04:34:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:34:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:34:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2025-02-06 04:34:43,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34688995215311 [2025-02-06 04:34:43,089 INFO L175 Difference]: Start difference. First operand has 252 places, 225 transitions, 3776 flow. Second operand 19 states and 145 transitions. [2025-02-06 04:34:43,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 272 transitions, 5012 flow [2025-02-06 04:34:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 272 transitions, 4676 flow, removed 153 selfloop flow, removed 11 redundant places. [2025-02-06 04:34:43,219 INFO L231 Difference]: Finished difference. Result has 263 places, 238 transitions, 3981 flow [2025-02-06 04:34:43,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3981, PETRI_PLACES=263, PETRI_TRANSITIONS=238} [2025-02-06 04:34:43,220 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 241 predicate places. [2025-02-06 04:34:43,220 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 238 transitions, 3981 flow [2025-02-06 04:34:43,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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) [2025-02-06 04:34:43,220 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:34:43,220 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:34:43,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-02-06 04:34:43,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-02-06 04:34:43,420 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:34:43,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:34:43,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1160575454, now seen corresponding path program 52 times [2025-02-06 04:34:43,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:34:43,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385876916] [2025-02-06 04:34:43,421 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:34:43,429 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:43,445 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:43,445 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:43,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 04:34:44,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:34:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385876916] [2025-02-06 04:34:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385876916] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:34:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831248633] [2025-02-06 04:34:44,145 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:34:44,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:34:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:34:44,148 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:34:44,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-02-06 04:34:44,320 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-06 04:34:44,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:34:44,360 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:34:44,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:34:44,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:34:44,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:34:44,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:34:44,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2025-02-06 04:34:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:44,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:34:44,743 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2025-02-06 04:34:44,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2025-02-06 04:34:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 04:34:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831248633] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:34:44,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:34:44,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2025-02-06 04:34:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282935584] [2025-02-06 04:34:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:34:44,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 04:34:44,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:34:44,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 04:34:44,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2025-02-06 04:34:44,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2025-02-06 04:34:44,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 238 transitions, 3981 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:34:44,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:34:44,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2025-02-06 04:34:44,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand