./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:19:53,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:19:53,092 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:19:53,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:19:53,104 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:19:53,129 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:19:53,130 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:19:53,130 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:19:53,130 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:19:53,131 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:19:53,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:19:53,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:19:53,131 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:19:53,132 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:19:53,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:19:53,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:19:53,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:19:53,133 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 -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2025-02-08 01:19:53,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:19:53,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:19:53,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:19:53,419 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:19:53,420 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:19:53,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-02-08 01:19:54,756 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/09a5bacb3/cc6aac68fe494f7ca08e35f353bf52ce/FLAGe3a688d35 [2025-02-08 01:19:55,011 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:19:55,012 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-02-08 01:19:55,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/09a5bacb3/cc6aac68fe494f7ca08e35f353bf52ce/FLAGe3a688d35 [2025-02-08 01:19:55,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/09a5bacb3/cc6aac68fe494f7ca08e35f353bf52ce [2025-02-08 01:19:55,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:19:55,039 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:19:55,040 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:19:55,040 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:19:55,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:19:55,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77efac06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55, skipping insertion in model container [2025-02-08 01:19:55,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,057 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:19:55,212 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/popl20-queue-add-2.wvr.c[2722,2735] [2025-02-08 01:19:55,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:19:55,234 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:19:55,257 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/popl20-queue-add-2.wvr.c[2722,2735] [2025-02-08 01:19:55,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:19:55,277 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:19:55,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55 WrapperNode [2025-02-08 01:19:55,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:19:55,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:19:55,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:19:55,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:19:55,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,319 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2025-02-08 01:19:55,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:19:55,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:19:55,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:19:55,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:19:55,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,334 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,351 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 01:19:55,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,360 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:19:55,371 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:19:55,371 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:19:55,371 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:19:55,372 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (1/1) ... [2025-02-08 01:19:55,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:19:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:55,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:19:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 01:19:55,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 01:19:55,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:19:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:19:55,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:19:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:19:55,429 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:19:55,505 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:19:55,507 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:19:55,740 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:19:55,740 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:19:55,924 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:19:55,925 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:19:55,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:19:55 BoogieIcfgContainer [2025-02-08 01:19:55,926 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:19:55,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:19:55,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:19:55,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:19:55,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:19:55" (1/3) ... [2025-02-08 01:19:55,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1789fdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:19:55, skipping insertion in model container [2025-02-08 01:19:55,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:55" (2/3) ... [2025-02-08 01:19:55,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1789fdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:19:55, skipping insertion in model container [2025-02-08 01:19:55,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:19:55" (3/3) ... [2025-02-08 01:19:55,937 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2025-02-08 01:19:55,958 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:19:55,959 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-08 01:19:55,959 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:19:56,018 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 01:19:56,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2025-02-08 01:19:56,089 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-02-08 01:19:56,091 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:19:56,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-02-08 01:19:56,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2025-02-08 01:19:56,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2025-02-08 01:19:56,107 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:19:56,119 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;@319e5e8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:19:56,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-08 01:19:56,132 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:19:56,133 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-02-08 01:19:56,133 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:19:56,133 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:56,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:56,134 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:56,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash -463622217, now seen corresponding path program 1 times [2025-02-08 01:19:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:56,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073471716] [2025-02-08 01:19:56,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:56,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 01:19:56,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 01:19:56,245 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:56,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073471716] [2025-02-08 01:19:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073471716] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:56,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:19:56,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48792269] [2025-02-08 01:19:56,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:56,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 01:19:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:56,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 01:19:56,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 01:19:56,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:19:56,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:56,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:56,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:19:56,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:56,467 INFO L124 PetriNetUnfolderBase]: 81/164 cut-off events. [2025-02-08 01:19:56,467 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-08 01:19:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 164 events. 81/164 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 559 event pairs, 66 based on Foata normal form. 13/159 useless extension candidates. Maximal degree in co-relation 294. Up to 146 conditions per place. [2025-02-08 01:19:56,470 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2025-02-08 01:19:56,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2025-02-08 01:19:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 01:19:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 01:19:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2025-02-08 01:19:56,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2025-02-08 01:19:56,483 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 2 states and 36 transitions. [2025-02-08 01:19:56,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2025-02-08 01:19:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 01:19:56,490 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 54 flow [2025-02-08 01:19:56,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2025-02-08 01:19:56,497 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2025-02-08 01:19:56,498 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 54 flow [2025-02-08 01:19:56,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:56,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:56,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:56,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:19:56,499 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:56,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1101458281, now seen corresponding path program 1 times [2025-02-08 01:19:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:56,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578899975] [2025-02-08 01:19:56,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:56,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:56,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 01:19:56,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 01:19:56,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:56,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578899975] [2025-02-08 01:19:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578899975] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:19:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108028799] [2025-02-08 01:19:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:56,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:19:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:56,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:19:56,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:19:56,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:19:56,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:56,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:56,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:19:56,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:56,827 INFO L124 PetriNetUnfolderBase]: 99/207 cut-off events. [2025-02-08 01:19:56,828 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:19:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 207 events. 99/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 679 event pairs, 27 based on Foata normal form. 3/197 useless extension candidates. Maximal degree in co-relation 381. Up to 132 conditions per place. [2025-02-08 01:19:56,830 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 23 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2025-02-08 01:19:56,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 121 flow [2025-02-08 01:19:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:19:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:19:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2025-02-08 01:19:56,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2025-02-08 01:19:56,832 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 54 flow. Second operand 3 states and 51 transitions. [2025-02-08 01:19:56,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 121 flow [2025-02-08 01:19:56,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 01:19:56,835 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 73 flow [2025-02-08 01:19:56,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2025-02-08 01:19:56,837 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2025-02-08 01:19:56,837 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 73 flow [2025-02-08 01:19:56,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:56,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:56,838 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:56,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:19:56,838 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:56,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1127221929, now seen corresponding path program 2 times [2025-02-08 01:19:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:56,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310135126] [2025-02-08 01:19:56,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:19:56,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:56,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-02-08 01:19:56,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 01:19:56,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:19:56,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310135126] [2025-02-08 01:19:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310135126] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:57,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 01:19:57,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638499758] [2025-02-08 01:19:57,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:57,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:19:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:57,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:19:57,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:19:57,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:19:57,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:57,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:57,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:19:57,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:57,144 INFO L124 PetriNetUnfolderBase]: 107/235 cut-off events. [2025-02-08 01:19:57,145 INFO L125 PetriNetUnfolderBase]: For 40/42 co-relation queries the response was YES. [2025-02-08 01:19:57,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 235 events. 107/235 cut-off events. For 40/42 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 871 event pairs, 81 based on Foata normal form. 11/233 useless extension candidates. Maximal degree in co-relation 502. Up to 166 conditions per place. [2025-02-08 01:19:57,149 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 20 selfloop transitions, 2 changer transitions 8/36 dead transitions. [2025-02-08 01:19:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 153 flow [2025-02-08 01:19:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:19:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:19:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-02-08 01:19:57,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2025-02-08 01:19:57,152 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 73 flow. Second operand 4 states and 62 transitions. [2025-02-08 01:19:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 153 flow [2025-02-08 01:19:57,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 36 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:19:57,154 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 86 flow [2025-02-08 01:19:57,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2025-02-08 01:19:57,156 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2025-02-08 01:19:57,156 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 86 flow [2025-02-08 01:19:57,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:57,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:57,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:57,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:19:57,157 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:57,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash 832969646, now seen corresponding path program 1 times [2025-02-08 01:19:57,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:57,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402690126] [2025-02-08 01:19:57,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:57,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:57,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 01:19:57,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 01:19:57,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:57,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402690126] [2025-02-08 01:19:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402690126] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:57,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:57,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:19:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732919805] [2025-02-08 01:19:57,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:57,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:19:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:57,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:19:57,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:19:57,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2025-02-08 01:19:57,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:57,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:57,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2025-02-08 01:19:57,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:57,623 INFO L124 PetriNetUnfolderBase]: 191/389 cut-off events. [2025-02-08 01:19:57,623 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-02-08 01:19:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 389 events. 191/389 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1592 event pairs, 40 based on Foata normal form. 1/386 useless extension candidates. Maximal degree in co-relation 841. Up to 129 conditions per place. [2025-02-08 01:19:57,628 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 44 selfloop transitions, 9 changer transitions 6/63 dead transitions. [2025-02-08 01:19:57,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 63 transitions, 293 flow [2025-02-08 01:19:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:19:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:19:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2025-02-08 01:19:57,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2025-02-08 01:19:57,633 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 86 flow. Second operand 8 states and 107 transitions. [2025-02-08 01:19:57,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 63 transitions, 293 flow [2025-02-08 01:19:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 285 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-08 01:19:57,637 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 128 flow [2025-02-08 01:19:57,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2025-02-08 01:19:57,638 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2025-02-08 01:19:57,638 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 128 flow [2025-02-08 01:19:57,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:57,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:57,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:57,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 01:19:57,640 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:57,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1590569349, now seen corresponding path program 1 times [2025-02-08 01:19:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667223341] [2025-02-08 01:19:57,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:57,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 01:19:57,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 01:19:57,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:57,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667223341] [2025-02-08 01:19:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667223341] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543418377] [2025-02-08 01:19:57,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:57,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:57,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:19:57,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 01:19:57,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 01:19:57,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:57,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:57,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:19:57,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:58,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:58,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543418377] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:58,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 01:19:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005983651] [2025-02-08 01:19:58,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:58,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 01:19:58,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:58,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 01:19:58,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-08 01:19:58,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:19:58,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 12 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:58,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:58,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:19:58,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:58,373 INFO L124 PetriNetUnfolderBase]: 243/542 cut-off events. [2025-02-08 01:19:58,373 INFO L125 PetriNetUnfolderBase]: For 309/332 co-relation queries the response was YES. [2025-02-08 01:19:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 542 events. 243/542 cut-off events. For 309/332 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2674 event pairs, 137 based on Foata normal form. 26/540 useless extension candidates. Maximal degree in co-relation 1361. Up to 262 conditions per place. [2025-02-08 01:19:58,378 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 41 selfloop transitions, 5 changer transitions 4/59 dead transitions. [2025-02-08 01:19:58,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 317 flow [2025-02-08 01:19:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:19:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:19:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2025-02-08 01:19:58,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2025-02-08 01:19:58,379 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 128 flow. Second operand 6 states and 93 transitions. [2025-02-08 01:19:58,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 317 flow [2025-02-08 01:19:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 306 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-08 01:19:58,382 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 163 flow [2025-02-08 01:19:58,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2025-02-08 01:19:58,384 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2025-02-08 01:19:58,385 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 163 flow [2025-02-08 01:19:58,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 12 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:58,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:58,385 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:58,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:58,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:58,590 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:58,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 27035578, now seen corresponding path program 1 times [2025-02-08 01:19:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21084640] [2025-02-08 01:19:58,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:58,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 01:19:58,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:19:58,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:58,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:58,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21084640] [2025-02-08 01:19:58,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21084640] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057906820] [2025-02-08 01:19:58,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:58,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:58,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:19:58,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 01:19:58,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:19:58,809 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:58,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:58,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 01:19:58,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:58,859 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:19:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057906820] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:58,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:19:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-08 01:19:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621011511] [2025-02-08 01:19:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:58,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:19:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:58,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:19:58,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:19:58,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:19:58,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:58,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:58,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:19:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:59,000 INFO L124 PetriNetUnfolderBase]: 257/625 cut-off events. [2025-02-08 01:19:59,000 INFO L125 PetriNetUnfolderBase]: For 425/442 co-relation queries the response was YES. [2025-02-08 01:19:59,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 625 events. 257/625 cut-off events. For 425/442 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3202 event pairs, 64 based on Foata normal form. 20/634 useless extension candidates. Maximal degree in co-relation 1565. Up to 171 conditions per place. [2025-02-08 01:19:59,004 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 44 selfloop transitions, 7 changer transitions 5/64 dead transitions. [2025-02-08 01:19:59,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 361 flow [2025-02-08 01:19:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:19:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:19:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2025-02-08 01:19:59,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6810344827586207 [2025-02-08 01:19:59,007 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 163 flow. Second operand 4 states and 79 transitions. [2025-02-08 01:19:59,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 361 flow [2025-02-08 01:19:59,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 338 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-02-08 01:19:59,011 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 168 flow [2025-02-08 01:19:59,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2025-02-08 01:19:59,013 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2025-02-08 01:19:59,014 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 168 flow [2025-02-08 01:19:59,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:59,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:59,014 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:59,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:59,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:59,218 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:19:59,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash -409824164, now seen corresponding path program 2 times [2025-02-08 01:19:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:59,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24303035] [2025-02-08 01:19:59,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:19:59,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:59,227 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:19:59,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:19:59,252 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:59,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:59,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24303035] [2025-02-08 01:19:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24303035] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339664363] [2025-02-08 01:19:59,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:19:59,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:59,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:59,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:19:59,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:19:59,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:19:59,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:59,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:59,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 01:19:59,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:00,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2025-02-08 01:20:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:00,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:00,314 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:20:00,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2025-02-08 01:20:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339664363] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:00,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:00,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2025-02-08 01:20:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119412970] [2025-02-08 01:20:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:00,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 01:20:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:00,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 01:20:00,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2025-02-08 01:20:00,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-08 01:20:00,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 168 flow. Second operand has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:00,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:00,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-08 01:20:00,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:01,910 INFO L124 PetriNetUnfolderBase]: 1031/1954 cut-off events. [2025-02-08 01:20:01,910 INFO L125 PetriNetUnfolderBase]: For 2318/2318 co-relation queries the response was YES. [2025-02-08 01:20:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 1954 events. 1031/1954 cut-off events. For 2318/2318 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10752 event pairs, 98 based on Foata normal form. 79/2029 useless extension candidates. Maximal degree in co-relation 5511. Up to 395 conditions per place. [2025-02-08 01:20:01,926 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 162 selfloop transitions, 44 changer transitions 18/227 dead transitions. [2025-02-08 01:20:01,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 227 transitions, 1402 flow [2025-02-08 01:20:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 01:20:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 01:20:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 345 transitions. [2025-02-08 01:20:01,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45755968169761274 [2025-02-08 01:20:01,928 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 168 flow. Second operand 26 states and 345 transitions. [2025-02-08 01:20:01,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 227 transitions, 1402 flow [2025-02-08 01:20:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 227 transitions, 1326 flow, removed 38 selfloop flow, removed 2 redundant places. [2025-02-08 01:20:01,939 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 611 flow [2025-02-08 01:20:01,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=611, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2025-02-08 01:20:01,941 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2025-02-08 01:20:01,943 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 611 flow [2025-02-08 01:20:01,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:01,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:01,943 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:01,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 01:20:02,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:02,144 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:02,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:02,145 INFO L85 PathProgramCache]: Analyzing trace with hash 917943152, now seen corresponding path program 3 times [2025-02-08 01:20:02,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:02,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812489361] [2025-02-08 01:20:02,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:02,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:02,153 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:20:02,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:20:02,175 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:20:02,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:02,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:02,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812489361] [2025-02-08 01:20:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812489361] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045717409] [2025-02-08 01:20:02,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:02,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:02,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:02,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:02,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 01:20:02,649 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-08 01:20:02,668 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 01:20:02,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:20:02,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:02,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 01:20:02,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:02,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:02,988 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:20:02,989 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 12 [2025-02-08 01:20:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045717409] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:03,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-08 01:20:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954919491] [2025-02-08 01:20:03,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:03,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 01:20:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:03,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 01:20:03,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2025-02-08 01:20:03,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-08 01:20:03,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 611 flow. Second operand has 23 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:03,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:03,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-08 01:20:03,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:04,266 INFO L124 PetriNetUnfolderBase]: 1243/2359 cut-off events. [2025-02-08 01:20:04,267 INFO L125 PetriNetUnfolderBase]: For 7692/7692 co-relation queries the response was YES. [2025-02-08 01:20:04,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 2359 events. 1243/2359 cut-off events. For 7692/7692 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13130 event pairs, 155 based on Foata normal form. 49/2354 useless extension candidates. Maximal degree in co-relation 8166. Up to 733 conditions per place. [2025-02-08 01:20:04,284 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 175 selfloop transitions, 51 changer transitions 1/230 dead transitions. [2025-02-08 01:20:04,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 230 transitions, 1840 flow [2025-02-08 01:20:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-08 01:20:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-08 01:20:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 308 transitions. [2025-02-08 01:20:04,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4617691154422789 [2025-02-08 01:20:04,286 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 611 flow. Second operand 23 states and 308 transitions. [2025-02-08 01:20:04,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 230 transitions, 1840 flow [2025-02-08 01:20:04,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 230 transitions, 1706 flow, removed 63 selfloop flow, removed 6 redundant places. [2025-02-08 01:20:04,314 INFO L231 Difference]: Finished difference. Result has 103 places, 97 transitions, 854 flow [2025-02-08 01:20:04,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=97} [2025-02-08 01:20:04,316 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2025-02-08 01:20:04,316 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 97 transitions, 854 flow [2025-02-08 01:20:04,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:04,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:04,318 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:04,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 01:20:04,521 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,SelfDestructingSolverStorable7 [2025-02-08 01:20:04,522 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:04,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2036531455, now seen corresponding path program 4 times [2025-02-08 01:20:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895020870] [2025-02-08 01:20:04,523 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:04,533 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:20:04,549 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:20:04,552 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:04,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:04,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:04,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895020870] [2025-02-08 01:20:04,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895020870] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:04,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434728742] [2025-02-08 01:20:04,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:04,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:04,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:04,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:04,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 01:20:04,730 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:20:04,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:20:04,750 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:04,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:04,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 01:20:04,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:04,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:04,845 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:20:04,845 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 12 [2025-02-08 01:20:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434728742] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:04,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:04,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2025-02-08 01:20:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348539108] [2025-02-08 01:20:04,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:04,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 01:20:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:04,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 01:20:04,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-08 01:20:04,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2025-02-08 01:20:04,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 97 transitions, 854 flow. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 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) [2025-02-08 01:20:04,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:04,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2025-02-08 01:20:04,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:05,243 INFO L124 PetriNetUnfolderBase]: 987/2030 cut-off events. [2025-02-08 01:20:05,243 INFO L125 PetriNetUnfolderBase]: For 11897/11897 co-relation queries the response was YES. [2025-02-08 01:20:05,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 2030 events. 987/2030 cut-off events. For 11897/11897 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11970 event pairs, 115 based on Foata normal form. 28/2055 useless extension candidates. Maximal degree in co-relation 7873. Up to 747 conditions per place. [2025-02-08 01:20:05,260 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 96 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2025-02-08 01:20:05,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 1457 flow [2025-02-08 01:20:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:20:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:20:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2025-02-08 01:20:05,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2025-02-08 01:20:05,261 INFO L175 Difference]: Start difference. First operand has 103 places, 97 transitions, 854 flow. Second operand 8 states and 101 transitions. [2025-02-08 01:20:05,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 1457 flow [2025-02-08 01:20:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 139 transitions, 1317 flow, removed 54 selfloop flow, removed 10 redundant places. [2025-02-08 01:20:05,293 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 922 flow [2025-02-08 01:20:05,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2025-02-08 01:20:05,295 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2025-02-08 01:20:05,295 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 922 flow [2025-02-08 01:20:05,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 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) [2025-02-08 01:20:05,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:05,296 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:05,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 01:20:05,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:05,501 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:05,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1824493428, now seen corresponding path program 1 times [2025-02-08 01:20:05,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:05,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13699288] [2025-02-08 01:20:05,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:05,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:05,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 01:20:05,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:05,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:05,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:06,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13699288] [2025-02-08 01:20:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13699288] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362399507] [2025-02-08 01:20:06,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:06,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:06,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 01:20:06,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 01:20:06,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:06,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:06,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:06,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-08 01:20:06,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:06,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:07,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:07,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-08 01:20:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362399507] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:07,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-02-08 01:20:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619847165] [2025-02-08 01:20:07,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:07,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-08 01:20:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:07,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-08 01:20:07,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2025-02-08 01:20:07,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:07,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 922 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:07,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:07,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:11,287 INFO L124 PetriNetUnfolderBase]: 2268/4256 cut-off events. [2025-02-08 01:20:11,287 INFO L125 PetriNetUnfolderBase]: For 26907/26907 co-relation queries the response was YES. [2025-02-08 01:20:11,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 4256 events. 2268/4256 cut-off events. For 26907/26907 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 26569 event pairs, 215 based on Foata normal form. 4/4259 useless extension candidates. Maximal degree in co-relation 17125. Up to 1647 conditions per place. [2025-02-08 01:20:11,316 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 252 selfloop transitions, 137 changer transitions 41/432 dead transitions. [2025-02-08 01:20:11,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 432 transitions, 3749 flow [2025-02-08 01:20:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-02-08 01:20:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-02-08 01:20:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 519 transitions. [2025-02-08 01:20:11,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34416445623342173 [2025-02-08 01:20:11,319 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 922 flow. Second operand 52 states and 519 transitions. [2025-02-08 01:20:11,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 432 transitions, 3749 flow [2025-02-08 01:20:11,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 432 transitions, 3709 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-08 01:20:11,394 INFO L231 Difference]: Finished difference. Result has 167 places, 211 transitions, 2239 flow [2025-02-08 01:20:11,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2239, PETRI_PLACES=167, PETRI_TRANSITIONS=211} [2025-02-08 01:20:11,395 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2025-02-08 01:20:11,395 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 211 transitions, 2239 flow [2025-02-08 01:20:11,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:11,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:11,396 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:11,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 01:20:11,600 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,SelfDestructingSolverStorable9 [2025-02-08 01:20:11,600 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:11,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1254565972, now seen corresponding path program 2 times [2025-02-08 01:20:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:11,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874078000] [2025-02-08 01:20:11,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:11,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:11,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:11,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:11,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874078000] [2025-02-08 01:20:12,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874078000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007673168] [2025-02-08 01:20:12,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:12,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:12,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 01:20:12,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:12,452 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:12,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:12,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:12,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 01:20:12,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:12,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-02-08 01:20:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:12,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:13,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:13,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-08 01:20:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:13,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007673168] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:13,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:13,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-02-08 01:20:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784894455] [2025-02-08 01:20:13,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:13,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-08 01:20:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:13,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-08 01:20:13,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2025-02-08 01:20:13,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:13,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 211 transitions, 2239 flow. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:13,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:13,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:13,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:17,120 INFO L124 PetriNetUnfolderBase]: 2633/4986 cut-off events. [2025-02-08 01:20:17,121 INFO L125 PetriNetUnfolderBase]: For 42098/42098 co-relation queries the response was YES. [2025-02-08 01:20:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23976 conditions, 4986 events. 2633/4986 cut-off events. For 42098/42098 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 32656 event pairs, 222 based on Foata normal form. 3/4988 useless extension candidates. Maximal degree in co-relation 23926. Up to 2087 conditions per place. [2025-02-08 01:20:17,157 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 226 selfloop transitions, 305 changer transitions 47/580 dead transitions. [2025-02-08 01:20:17,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 580 transitions, 6271 flow [2025-02-08 01:20:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-02-08 01:20:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-02-08 01:20:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 578 transitions. [2025-02-08 01:20:17,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3267382702091577 [2025-02-08 01:20:17,160 INFO L175 Difference]: Start difference. First operand has 167 places, 211 transitions, 2239 flow. Second operand 61 states and 578 transitions. [2025-02-08 01:20:17,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 580 transitions, 6271 flow [2025-02-08 01:20:17,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 580 transitions, 6124 flow, removed 57 selfloop flow, removed 10 redundant places. [2025-02-08 01:20:17,293 INFO L231 Difference]: Finished difference. Result has 236 places, 382 transitions, 5148 flow [2025-02-08 01:20:17,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=5148, PETRI_PLACES=236, PETRI_TRANSITIONS=382} [2025-02-08 01:20:17,293 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2025-02-08 01:20:17,294 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 382 transitions, 5148 flow [2025-02-08 01:20:17,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:17,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:17,294 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:17,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 01:20:17,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:17,495 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:17,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1688820772, now seen corresponding path program 3 times [2025-02-08 01:20:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:17,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158999194] [2025-02-08 01:20:17,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:17,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:17,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:17,520 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:20:17,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158999194] [2025-02-08 01:20:18,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158999194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043035217] [2025-02-08 01:20:18,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:18,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:18,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:18,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:18,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 01:20:18,334 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:18,358 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:18,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:20:18,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:18,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-08 01:20:18,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:18,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:18,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:18,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-02-08 01:20:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:18,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043035217] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:18,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:18,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 35 [2025-02-08 01:20:18,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283320847] [2025-02-08 01:20:18,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:18,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-08 01:20:18,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:18,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-08 01:20:18,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 01:20:19,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:19,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 382 transitions, 5148 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:19,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:19,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:19,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:21,186 INFO L124 PetriNetUnfolderBase]: 3075/5770 cut-off events. [2025-02-08 01:20:21,186 INFO L125 PetriNetUnfolderBase]: For 81762/81762 co-relation queries the response was YES. [2025-02-08 01:20:21,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34938 conditions, 5770 events. 3075/5770 cut-off events. For 81762/81762 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 38628 event pairs, 153 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 34866. Up to 1436 conditions per place. [2025-02-08 01:20:21,235 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 341 selfloop transitions, 319 changer transitions 40/702 dead transitions. [2025-02-08 01:20:21,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 702 transitions, 10217 flow [2025-02-08 01:20:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-08 01:20:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-02-08 01:20:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 439 transitions. [2025-02-08 01:20:21,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3440438871473354 [2025-02-08 01:20:21,239 INFO L175 Difference]: Start difference. First operand has 236 places, 382 transitions, 5148 flow. Second operand 44 states and 439 transitions. [2025-02-08 01:20:21,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 702 transitions, 10217 flow [2025-02-08 01:20:21,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 702 transitions, 9742 flow, removed 200 selfloop flow, removed 25 redundant places. [2025-02-08 01:20:21,628 INFO L231 Difference]: Finished difference. Result has 257 places, 494 transitions, 7267 flow [2025-02-08 01:20:21,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7267, PETRI_PLACES=257, PETRI_TRANSITIONS=494} [2025-02-08 01:20:21,629 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2025-02-08 01:20:21,629 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 494 transitions, 7267 flow [2025-02-08 01:20:21,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:21,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:21,630 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:21,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 01:20:21,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:21,830 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:21,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:21,831 INFO L85 PathProgramCache]: Analyzing trace with hash -347117036, now seen corresponding path program 4 times [2025-02-08 01:20:21,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:21,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12834050] [2025-02-08 01:20:21,831 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:21,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:21,836 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:21,845 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:21,845 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:21,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:22,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:22,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12834050] [2025-02-08 01:20:22,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12834050] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:22,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565794086] [2025-02-08 01:20:22,430 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:22,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:22,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 01:20:22,482 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:20:22,501 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:20:22,501 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:22,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:22,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-08 01:20:22,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:22,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-02-08 01:20:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:23,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:23,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:23,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-02-08 01:20:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565794086] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:23,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2025-02-08 01:20:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414326445] [2025-02-08 01:20:23,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:23,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-08 01:20:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:23,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-08 01:20:23,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2025-02-08 01:20:23,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:23,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 494 transitions, 7267 flow. Second operand has 43 states, 43 states have (on average 5.674418604651163) internal successors, (244), 43 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:23,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:23,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:23,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:26,242 INFO L124 PetriNetUnfolderBase]: 3099/5848 cut-off events. [2025-02-08 01:20:26,242 INFO L125 PetriNetUnfolderBase]: For 96752/96752 co-relation queries the response was YES. [2025-02-08 01:20:26,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38065 conditions, 5848 events. 3099/5848 cut-off events. For 96752/96752 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 39625 event pairs, 199 based on Foata normal form. 3/5850 useless extension candidates. Maximal degree in co-relation 37989. Up to 2553 conditions per place. [2025-02-08 01:20:26,285 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 323 selfloop transitions, 320 changer transitions 39/684 dead transitions. [2025-02-08 01:20:26,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 684 transitions, 10481 flow [2025-02-08 01:20:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-08 01:20:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-02-08 01:20:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 355 transitions. [2025-02-08 01:20:26,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3221415607985481 [2025-02-08 01:20:26,287 INFO L175 Difference]: Start difference. First operand has 257 places, 494 transitions, 7267 flow. Second operand 38 states and 355 transitions. [2025-02-08 01:20:26,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 684 transitions, 10481 flow [2025-02-08 01:20:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 684 transitions, 10194 flow, removed 112 selfloop flow, removed 22 redundant places. [2025-02-08 01:20:26,657 INFO L231 Difference]: Finished difference. Result has 276 places, 529 transitions, 8770 flow [2025-02-08 01:20:26,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8770, PETRI_PLACES=276, PETRI_TRANSITIONS=529} [2025-02-08 01:20:26,658 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 247 predicate places. [2025-02-08 01:20:26,658 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 529 transitions, 8770 flow [2025-02-08 01:20:26,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.674418604651163) internal successors, (244), 43 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:26,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:26,658 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:26,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 01:20:26,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:26,859 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:26,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1489547137, now seen corresponding path program 5 times [2025-02-08 01:20:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559668776] [2025-02-08 01:20:26,860 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:20:26,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:26,866 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-02-08 01:20:26,898 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:26,898 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:20:26,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559668776] [2025-02-08 01:20:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559668776] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589174786] [2025-02-08 01:20:27,600 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:20:27,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:27,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:27,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:27,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 01:20:27,650 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-02-08 01:20:27,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:27,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:20:27,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:27,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 01:20:27,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:28,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:28,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:28,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-02-08 01:20:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589174786] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:28,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 35 [2025-02-08 01:20:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953019233] [2025-02-08 01:20:28,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:28,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-08 01:20:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:28,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-08 01:20:28,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 01:20:28,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:28,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 529 transitions, 8770 flow. Second operand has 36 states, 36 states have (on average 5.888888888888889) internal successors, (212), 36 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:28,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:28,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:28,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:29,851 INFO L124 PetriNetUnfolderBase]: 3043/5719 cut-off events. [2025-02-08 01:20:29,851 INFO L125 PetriNetUnfolderBase]: For 114362/114362 co-relation queries the response was YES. [2025-02-08 01:20:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40471 conditions, 5719 events. 3043/5719 cut-off events. For 114362/114362 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 38353 event pairs, 232 based on Foata normal form. 1/5719 useless extension candidates. Maximal degree in co-relation 40390. Up to 2023 conditions per place. [2025-02-08 01:20:29,897 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 329 selfloop transitions, 282 changer transitions 14/627 dead transitions. [2025-02-08 01:20:29,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 627 transitions, 11004 flow [2025-02-08 01:20:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-08 01:20:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-08 01:20:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 220 transitions. [2025-02-08 01:20:29,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2025-02-08 01:20:29,898 INFO L175 Difference]: Start difference. First operand has 276 places, 529 transitions, 8770 flow. Second operand 22 states and 220 transitions. [2025-02-08 01:20:29,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 627 transitions, 11004 flow [2025-02-08 01:20:30,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 627 transitions, 10768 flow, removed 81 selfloop flow, removed 17 redundant places. [2025-02-08 01:20:30,260 INFO L231 Difference]: Finished difference. Result has 268 places, 531 transitions, 9355 flow [2025-02-08 01:20:30,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9355, PETRI_PLACES=268, PETRI_TRANSITIONS=531} [2025-02-08 01:20:30,261 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2025-02-08 01:20:30,261 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 531 transitions, 9355 flow [2025-02-08 01:20:30,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.888888888888889) internal successors, (212), 36 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:30,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:30,261 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:30,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 01:20:30,461 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,SelfDestructingSolverStorable13 [2025-02-08 01:20:30,462 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:30,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -293042119, now seen corresponding path program 6 times [2025-02-08 01:20:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:30,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360324419] [2025-02-08 01:20:30,462 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:20:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:30,470 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 3 equivalence classes. [2025-02-08 01:20:30,486 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:30,487 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 01:20:30,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:30,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360324419] [2025-02-08 01:20:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360324419] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716041131] [2025-02-08 01:20:30,708 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:20:30,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:30,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:30,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:30,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 01:20:30,827 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 3 equivalence classes. [2025-02-08 01:20:30,848 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:30,848 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 01:20:30,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:30,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 01:20:30,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:31,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:31,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:31,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-08 01:20:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716041131] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:31,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 22 [2025-02-08 01:20:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546983550] [2025-02-08 01:20:31,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:31,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 01:20:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:31,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 01:20:31,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-02-08 01:20:31,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:31,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 531 transitions, 9355 flow. Second operand has 23 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:31,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:31,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:31,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:32,560 INFO L124 PetriNetUnfolderBase]: 3014/5660 cut-off events. [2025-02-08 01:20:32,560 INFO L125 PetriNetUnfolderBase]: For 124567/124567 co-relation queries the response was YES. [2025-02-08 01:20:32,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41327 conditions, 5660 events. 3014/5660 cut-off events. For 124567/124567 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 37856 event pairs, 308 based on Foata normal form. 1/5660 useless extension candidates. Maximal degree in co-relation 41249. Up to 2655 conditions per place. [2025-02-08 01:20:32,615 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 271 selfloop transitions, 313 changer transitions 25/611 dead transitions. [2025-02-08 01:20:32,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 611 transitions, 11214 flow [2025-02-08 01:20:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-08 01:20:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-08 01:20:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 235 transitions. [2025-02-08 01:20:32,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3523238380809595 [2025-02-08 01:20:32,616 INFO L175 Difference]: Start difference. First operand has 268 places, 531 transitions, 9355 flow. Second operand 23 states and 235 transitions. [2025-02-08 01:20:32,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 611 transitions, 11214 flow [2025-02-08 01:20:33,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 611 transitions, 11119 flow, removed 13 selfloop flow, removed 13 redundant places. [2025-02-08 01:20:33,027 INFO L231 Difference]: Finished difference. Result has 278 places, 525 transitions, 9793 flow [2025-02-08 01:20:33,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9261, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9793, PETRI_PLACES=278, PETRI_TRANSITIONS=525} [2025-02-08 01:20:33,028 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2025-02-08 01:20:33,029 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 525 transitions, 9793 flow [2025-02-08 01:20:33,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:33,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:33,029 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:33,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 01:20:33,229 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,SelfDestructingSolverStorable14 [2025-02-08 01:20:33,230 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:33,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash -522889197, now seen corresponding path program 7 times [2025-02-08 01:20:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340569570] [2025-02-08 01:20:33,230 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:20:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:33,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 01:20:33,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:33,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:33,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340569570] [2025-02-08 01:20:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340569570] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88524665] [2025-02-08 01:20:34,072 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:20:34,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:34,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:34,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:34,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 01:20:34,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 01:20:34,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:34,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:34,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:34,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 01:20:34,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:34,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:34,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:34,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-08 01:20:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88524665] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:34,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:20:34,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 12] total 34 [2025-02-08 01:20:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870553472] [2025-02-08 01:20:34,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:34,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 01:20:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:34,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 01:20:34,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2025-02-08 01:20:34,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:34,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 525 transitions, 9793 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:34,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:34,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:34,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:35,792 INFO L124 PetriNetUnfolderBase]: 3018/5669 cut-off events. [2025-02-08 01:20:35,792 INFO L125 PetriNetUnfolderBase]: For 136029/136029 co-relation queries the response was YES. [2025-02-08 01:20:35,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42795 conditions, 5669 events. 3018/5669 cut-off events. For 136029/136029 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 38045 event pairs, 351 based on Foata normal form. 1/5669 useless extension candidates. Maximal degree in co-relation 42716. Up to 3102 conditions per place. [2025-02-08 01:20:35,996 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 293 selfloop transitions, 282 changer transitions 17/594 dead transitions. [2025-02-08 01:20:35,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 594 transitions, 11755 flow [2025-02-08 01:20:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 01:20:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 01:20:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2025-02-08 01:20:35,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2025-02-08 01:20:35,997 INFO L175 Difference]: Start difference. First operand has 278 places, 525 transitions, 9793 flow. Second operand 14 states and 150 transitions. [2025-02-08 01:20:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 594 transitions, 11755 flow [2025-02-08 01:20:36,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 594 transitions, 11388 flow, removed 18 selfloop flow, removed 16 redundant places. [2025-02-08 01:20:36,336 INFO L231 Difference]: Finished difference. Result has 275 places, 528 transitions, 10618 flow [2025-02-08 01:20:36,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9444, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10618, PETRI_PLACES=275, PETRI_TRANSITIONS=528} [2025-02-08 01:20:36,337 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 246 predicate places. [2025-02-08 01:20:36,337 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 528 transitions, 10618 flow [2025-02-08 01:20:36,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:36,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:36,337 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:36,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 01:20:36,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:36,538 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:36,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -183676823, now seen corresponding path program 8 times [2025-02-08 01:20:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024660628] [2025-02-08 01:20:36,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:36,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 01:20:36,556 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:36,556 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:36,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024660628] [2025-02-08 01:20:36,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024660628] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887832611] [2025-02-08 01:20:36,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:36,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:36,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 01:20:36,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 01:20:36,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 01:20:36,844 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:36,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:36,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 01:20:36,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:36,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:37,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:20:37,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-08 01:20:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:37,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887832611] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:37,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:37,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 21 [2025-02-08 01:20:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554850203] [2025-02-08 01:20:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:37,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 01:20:37,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:37,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 01:20:37,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-02-08 01:20:37,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-02-08 01:20:37,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 528 transitions, 10618 flow. Second operand has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 22 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:37,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:37,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-02-08 01:20:37,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:38,460 INFO L124 PetriNetUnfolderBase]: 3082/5771 cut-off events. [2025-02-08 01:20:38,460 INFO L125 PetriNetUnfolderBase]: For 164785/164785 co-relation queries the response was YES. [2025-02-08 01:20:38,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46739 conditions, 5771 events. 3082/5771 cut-off events. For 164785/164785 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38852 event pairs, 336 based on Foata normal form. 1/5771 useless extension candidates. Maximal degree in co-relation 46656. Up to 3305 conditions per place. [2025-02-08 01:20:38,508 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 304 selfloop transitions, 284 changer transitions 26/616 dead transitions. [2025-02-08 01:20:38,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 616 transitions, 12840 flow [2025-02-08 01:20:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 01:20:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 01:20:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 180 transitions. [2025-02-08 01:20:38,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2025-02-08 01:20:38,510 INFO L175 Difference]: Start difference. First operand has 275 places, 528 transitions, 10618 flow. Second operand 18 states and 180 transitions. [2025-02-08 01:20:38,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 616 transitions, 12840 flow [2025-02-08 01:20:38,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 616 transitions, 12771 flow, removed 16 selfloop flow, removed 8 redundant places. [2025-02-08 01:20:38,955 INFO L231 Difference]: Finished difference. Result has 289 places, 540 transitions, 11763 flow [2025-02-08 01:20:38,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10559, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11763, PETRI_PLACES=289, PETRI_TRANSITIONS=540} [2025-02-08 01:20:38,956 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 260 predicate places. [2025-02-08 01:20:38,956 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 540 transitions, 11763 flow [2025-02-08 01:20:38,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 22 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:38,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:38,956 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:38,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 01:20:39,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 01:20:39,157 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:39,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:39,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1922269769, now seen corresponding path program 9 times [2025-02-08 01:20:39,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:39,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963810874] [2025-02-08 01:20:39,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:39,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:39,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-02-08 01:20:39,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 27 of 30 statements. [2025-02-08 01:20:39,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 01:20:39,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:20:39,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963810874] [2025-02-08 01:20:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963810874] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:39,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-08 01:20:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248930628] [2025-02-08 01:20:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:39,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 01:20:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:39,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 01:20:39,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-02-08 01:20:39,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-08 01:20:39,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 540 transitions, 11763 flow. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:39,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:39,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-08 01:20:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:40,600 INFO L124 PetriNetUnfolderBase]: 2736/5318 cut-off events. [2025-02-08 01:20:40,600 INFO L125 PetriNetUnfolderBase]: For 186891/187142 co-relation queries the response was YES. [2025-02-08 01:20:40,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46040 conditions, 5318 events. 2736/5318 cut-off events. For 186891/187142 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 36913 event pairs, 385 based on Foata normal form. 26/5323 useless extension candidates. Maximal degree in co-relation 45952. Up to 4302 conditions per place. [2025-02-08 01:20:40,654 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 471 selfloop transitions, 31 changer transitions 13/589 dead transitions. [2025-02-08 01:20:40,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 589 transitions, 13371 flow [2025-02-08 01:20:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 01:20:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 01:20:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2025-02-08 01:20:40,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2025-02-08 01:20:40,655 INFO L175 Difference]: Start difference. First operand has 289 places, 540 transitions, 11763 flow. Second operand 12 states and 132 transitions. [2025-02-08 01:20:40,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 589 transitions, 13371 flow [2025-02-08 01:20:41,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 589 transitions, 13319 flow, removed 12 selfloop flow, removed 11 redundant places. [2025-02-08 01:20:41,168 INFO L231 Difference]: Finished difference. Result has 288 places, 550 transitions, 12023 flow [2025-02-08 01:20:41,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11717, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12023, PETRI_PLACES=288, PETRI_TRANSITIONS=550} [2025-02-08 01:20:41,168 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 259 predicate places. [2025-02-08 01:20:41,169 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 550 transitions, 12023 flow [2025-02-08 01:20:41,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:41,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:41,169 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:41,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 01:20:41,169 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:41,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash -503207369, now seen corresponding path program 10 times [2025-02-08 01:20:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:41,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494348054] [2025-02-08 01:20:41,170 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:41,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:41,176 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-08 01:20:41,181 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 01:20:41,181 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:41,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:41,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494348054] [2025-02-08 01:20:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494348054] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099273887] [2025-02-08 01:20:41,261 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:41,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:41,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:41,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:41,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 01:20:41,319 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-08 01:20:41,339 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 01:20:41,339 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:41,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:41,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:20:41,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:41,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:41,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099273887] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:41,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:41,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-08 01:20:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729416069] [2025-02-08 01:20:41,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:41,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 01:20:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:41,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 01:20:41,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-02-08 01:20:41,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:20:41,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 550 transitions, 12023 flow. Second operand has 18 states, 18 states have (on average 10.5) internal successors, (189), 18 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:41,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:41,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:20:41,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:41,967 INFO L124 PetriNetUnfolderBase]: 987/2228 cut-off events. [2025-02-08 01:20:41,967 INFO L125 PetriNetUnfolderBase]: For 81306/81472 co-relation queries the response was YES. [2025-02-08 01:20:41,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19614 conditions, 2228 events. 987/2228 cut-off events. For 81306/81472 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14937 event pairs, 334 based on Foata normal form. 148/2339 useless extension candidates. Maximal degree in co-relation 19525. Up to 1100 conditions per place. [2025-02-08 01:20:41,987 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 158 selfloop transitions, 7 changer transitions 80/326 dead transitions. [2025-02-08 01:20:41,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 326 transitions, 6978 flow [2025-02-08 01:20:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:20:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:20:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2025-02-08 01:20:41,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 01:20:41,988 INFO L175 Difference]: Start difference. First operand has 288 places, 550 transitions, 12023 flow. Second operand 8 states and 116 transitions. [2025-02-08 01:20:41,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 326 transitions, 6978 flow [2025-02-08 01:20:42,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 326 transitions, 6625 flow, removed 59 selfloop flow, removed 35 redundant places. [2025-02-08 01:20:42,158 INFO L231 Difference]: Finished difference. Result has 229 places, 228 transitions, 4607 flow [2025-02-08 01:20:42,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4607, PETRI_PLACES=229, PETRI_TRANSITIONS=228} [2025-02-08 01:20:42,159 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 200 predicate places. [2025-02-08 01:20:42,159 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 4607 flow [2025-02-08 01:20:42,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.5) internal successors, (189), 18 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:42,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:42,159 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:42,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-08 01:20:42,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:42,363 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:42,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 146748178, now seen corresponding path program 11 times [2025-02-08 01:20:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091020908] [2025-02-08 01:20:42,364 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:20:42,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:42,369 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 3 equivalence classes. [2025-02-08 01:20:42,373 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:42,374 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:20:42,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:42,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091020908] [2025-02-08 01:20:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091020908] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269784909] [2025-02-08 01:20:42,459 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:20:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:42,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:42,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 01:20:42,513 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 3 equivalence classes. [2025-02-08 01:20:42,532 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:42,532 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 01:20:42,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:42,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 01:20:42,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:42,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:20:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269784909] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:42,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:20:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2025-02-08 01:20:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3604961] [2025-02-08 01:20:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:42,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:20:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:42,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:20:42,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-08 01:20:42,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-02-08 01:20:42,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 228 transitions, 4607 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:42,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:42,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-02-08 01:20:42,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:43,029 INFO L124 PetriNetUnfolderBase]: 1357/2929 cut-off events. [2025-02-08 01:20:43,029 INFO L125 PetriNetUnfolderBase]: For 103231/103496 co-relation queries the response was YES. [2025-02-08 01:20:43,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24428 conditions, 2929 events. 1357/2929 cut-off events. For 103231/103496 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20073 event pairs, 132 based on Foata normal form. 98/2948 useless extension candidates. Maximal degree in co-relation 24362. Up to 638 conditions per place. [2025-02-08 01:20:43,056 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 173 selfloop transitions, 70 changer transitions 22/334 dead transitions. [2025-02-08 01:20:43,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 334 transitions, 6823 flow [2025-02-08 01:20:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:20:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:20:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2025-02-08 01:20:43,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.696551724137931 [2025-02-08 01:20:43,057 INFO L175 Difference]: Start difference. First operand has 229 places, 228 transitions, 4607 flow. Second operand 5 states and 101 transitions. [2025-02-08 01:20:43,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 334 transitions, 6823 flow [2025-02-08 01:20:43,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 334 transitions, 6235 flow, removed 81 selfloop flow, removed 26 redundant places. [2025-02-08 01:20:43,250 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 4786 flow [2025-02-08 01:20:43,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4786, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2025-02-08 01:20:43,250 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2025-02-08 01:20:43,250 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 4786 flow [2025-02-08 01:20:43,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:43,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:43,250 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:43,256 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 [2025-02-08 01:20:43,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:43,451 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:43,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1720737546, now seen corresponding path program 12 times [2025-02-08 01:20:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68708894] [2025-02-08 01:20:43,452 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:20:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:43,457 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-08 01:20:43,465 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:43,465 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 01:20:43,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68708894] [2025-02-08 01:20:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68708894] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485306186] [2025-02-08 01:20:43,813 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:20:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:43,816 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:43,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 01:20:43,868 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-08 01:20:43,891 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:43,891 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 01:20:43,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:43,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-08 01:20:43,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:44,306 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:20:44,306 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 23 treesize of output 10 [2025-02-08 01:20:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:44,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:44,455 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-02-08 01:20:44,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-02-08 01:20:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485306186] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2025-02-08 01:20:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612927855] [2025-02-08 01:20:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:44,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-08 01:20:44,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:44,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-08 01:20:44,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2025-02-08 01:20:44,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2025-02-08 01:20:44,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 4786 flow. Second operand has 30 states, 30 states have (on average 8.266666666666667) internal successors, (248), 30 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:44,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:44,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2025-02-08 01:20:44,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:48,427 INFO L124 PetriNetUnfolderBase]: 6787/13448 cut-off events. [2025-02-08 01:20:48,427 INFO L125 PetriNetUnfolderBase]: For 368337/369484 co-relation queries the response was YES. [2025-02-08 01:20:48,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106898 conditions, 13448 events. 6787/13448 cut-off events. For 368337/369484 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 108474 event pairs, 899 based on Foata normal form. 605/13923 useless extension candidates. Maximal degree in co-relation 106840. Up to 2613 conditions per place. [2025-02-08 01:20:48,561 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 674 selfloop transitions, 490 changer transitions 28/1235 dead transitions. [2025-02-08 01:20:48,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1235 transitions, 26082 flow [2025-02-08 01:20:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-08 01:20:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-02-08 01:20:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 617 transitions. [2025-02-08 01:20:48,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5189234650967199 [2025-02-08 01:20:48,563 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 4786 flow. Second operand 41 states and 617 transitions. [2025-02-08 01:20:48,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1235 transitions, 26082 flow [2025-02-08 01:20:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1235 transitions, 23276 flow, removed 599 selfloop flow, removed 14 redundant places. [2025-02-08 01:20:49,824 INFO L231 Difference]: Finished difference. Result has 210 places, 742 transitions, 17533 flow [2025-02-08 01:20:49,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17533, PETRI_PLACES=210, PETRI_TRANSITIONS=742} [2025-02-08 01:20:49,824 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 181 predicate places. [2025-02-08 01:20:49,824 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 742 transitions, 17533 flow [2025-02-08 01:20:49,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.266666666666667) internal successors, (248), 30 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:49,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:49,825 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:49,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-08 01:20:50,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:50,025 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:50,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1864415706, now seen corresponding path program 13 times [2025-02-08 01:20:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:50,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830308366] [2025-02-08 01:20:50,026 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:20:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:50,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-08 01:20:50,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:50,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:50,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:50,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830308366] [2025-02-08 01:20:50,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830308366] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016212481] [2025-02-08 01:20:50,475 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:20:50,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:50,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 01:20:50,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-08 01:20:50,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:50,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:50,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:50,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-08 01:20:50,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:50,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:50,902 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-02-08 01:20:50,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-02-08 01:20:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016212481] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:51,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2025-02-08 01:20:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993449423] [2025-02-08 01:20:51,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:51,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-08 01:20:51,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:51,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-08 01:20:51,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2025-02-08 01:20:51,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2025-02-08 01:20:51,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 742 transitions, 17533 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:51,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:51,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2025-02-08 01:20:51,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:56,651 INFO L124 PetriNetUnfolderBase]: 7752/15312 cut-off events. [2025-02-08 01:20:56,652 INFO L125 PetriNetUnfolderBase]: For 557107/558721 co-relation queries the response was YES. [2025-02-08 01:20:56,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131519 conditions, 15312 events. 7752/15312 cut-off events. For 557107/558721 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 121376 event pairs, 449 based on Foata normal form. 549/15763 useless extension candidates. Maximal degree in co-relation 131443. Up to 3192 conditions per place. [2025-02-08 01:20:56,851 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 892 selfloop transitions, 753 changer transitions 23/1711 dead transitions. [2025-02-08 01:20:56,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1711 transitions, 40270 flow [2025-02-08 01:20:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-08 01:20:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-02-08 01:20:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 658 transitions. [2025-02-08 01:20:56,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5156739811912225 [2025-02-08 01:20:56,853 INFO L175 Difference]: Start difference. First operand has 210 places, 742 transitions, 17533 flow. Second operand 44 states and 658 transitions. [2025-02-08 01:20:56,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1711 transitions, 40270 flow [2025-02-08 01:20:59,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1711 transitions, 39217 flow, removed 522 selfloop flow, removed 4 redundant places. [2025-02-08 01:20:59,167 INFO L231 Difference]: Finished difference. Result has 273 places, 1078 transitions, 28962 flow [2025-02-08 01:20:59,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16836, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=28962, PETRI_PLACES=273, PETRI_TRANSITIONS=1078} [2025-02-08 01:20:59,168 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 244 predicate places. [2025-02-08 01:20:59,169 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 1078 transitions, 28962 flow [2025-02-08 01:20:59,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:59,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:59,169 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:59,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-08 01:20:59,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:59,370 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:20:59,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2033145707, now seen corresponding path program 14 times [2025-02-08 01:20:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:59,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478923086] [2025-02-08 01:20:59,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:59,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:59,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 01:20:59,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 01:20:59,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:59,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:21:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:21:00,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:21:00,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478923086] [2025-02-08 01:21:00,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478923086] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:21:00,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281312499] [2025-02-08 01:21:00,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:21:00,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:21:00,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:21:00,029 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:21:00,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 01:21:00,089 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 01:21:00,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 01:21:00,114 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:21:00,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:21:00,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-08 01:21:00,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:21:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:21:00,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:21:00,387 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-02-08 01:21:00,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-02-08 01:21:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 01:21:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281312499] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:21:00,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:21:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 22 [2025-02-08 01:21:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11741656] [2025-02-08 01:21:00,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:21:00,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 01:21:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:21:00,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 01:21:00,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2025-02-08 01:21:00,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2025-02-08 01:21:00,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 1078 transitions, 28962 flow. Second operand has 23 states, 23 states have (on average 8.478260869565217) internal successors, (195), 23 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:21:00,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:21:00,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2025-02-08 01:21:00,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:21:06,335 INFO L124 PetriNetUnfolderBase]: 9154/18259 cut-off events. [2025-02-08 01:21:06,335 INFO L125 PetriNetUnfolderBase]: For 905430/906706 co-relation queries the response was YES. [2025-02-08 01:21:06,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172126 conditions, 18259 events. 9154/18259 cut-off events. For 905430/906706 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 150059 event pairs, 750 based on Foata normal form. 294/18509 useless extension candidates. Maximal degree in co-relation 172025. Up to 5999 conditions per place. [2025-02-08 01:21:06,943 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 847 selfloop transitions, 685 changer transitions 4/1579 dead transitions. [2025-02-08 01:21:06,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1579 transitions, 42988 flow [2025-02-08 01:21:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-08 01:21:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-08 01:21:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 282 transitions. [2025-02-08 01:21:06,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44200626959247646 [2025-02-08 01:21:06,944 INFO L175 Difference]: Start difference. First operand has 273 places, 1078 transitions, 28962 flow. Second operand 22 states and 282 transitions. [2025-02-08 01:21:06,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1579 transitions, 42988 flow [2025-02-08 01:21:11,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1579 transitions, 41893 flow, removed 456 selfloop flow, removed 7 redundant places. [2025-02-08 01:21:11,103 INFO L231 Difference]: Finished difference. Result has 296 places, 1250 transitions, 36297 flow [2025-02-08 01:21:11,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=28188, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=36297, PETRI_PLACES=296, PETRI_TRANSITIONS=1250} [2025-02-08 01:21:11,104 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 267 predicate places. [2025-02-08 01:21:11,104 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 1250 transitions, 36297 flow [2025-02-08 01:21:11,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.478260869565217) internal successors, (195), 23 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:21:11,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:21:11,104 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:21:11,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-08 01:21:11,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:21:11,305 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-08 01:21:11,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:21:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 61671250, now seen corresponding path program 15 times [2025-02-08 01:21:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:21:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082749773] [2025-02-08 01:21:11,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:21:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:21:11,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 3 equivalence classes. [2025-02-08 01:21:11,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 01:21:11,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-08 01:21:11,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:21:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:21:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:21:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082749773] [2025-02-08 01:21:11,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082749773] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:21:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875996389] [2025-02-08 01:21:11,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:21:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:21:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:21:11,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:21:11,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 01:21:11,827 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 3 equivalence classes. [2025-02-08 01:21:11,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 01:21:11,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-08 01:21:11,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:21:11,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-02-08 01:21:11,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:21:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 01:21:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:21:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:21:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 01:21:12,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:21:12,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 19 [2025-02-08 01:21:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:21:13,025 INFO L312 TraceCheckSpWp]: Computing backward predicates...