./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 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:45:22,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:45:22,268 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:45:22,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:45:22,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:45:22,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:45:22,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:45:22,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:45:22,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:45:22,298 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:45:22,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:45:22,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:45:22,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:45:22,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:45:22,301 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:45:22,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:45:22,302 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:45:22,303 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:45:22,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:22,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:45:22,304 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2025-03-17 06:45:22,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:45:22,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:45:22,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:45:22,569 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:45:22,570 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:45:22,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-03-17 06:45:23,823 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670292f17/d504d706910b43c090ca343ab3a270fa/FLAG6439928cb [2025-03-17 06:45:24,064 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:45:24,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-03-17 06:45:24,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670292f17/d504d706910b43c090ca343ab3a270fa/FLAG6439928cb [2025-03-17 06:45:24,083 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670292f17/d504d706910b43c090ca343ab3a270fa [2025-03-17 06:45:24,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:45:24,087 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:45:24,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:24,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:45:24,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:45:24,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c604f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24, skipping insertion in model container [2025-03-17 06:45:24,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:45:24,248 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2025-03-17 06:45:24,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:24,266 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:45:24,283 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2025-03-17 06:45:24,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:24,301 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:45:24,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24 WrapperNode [2025-03-17 06:45:24,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:24,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:24,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:45:24,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:45:24,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,333 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2025-03-17 06:45:24,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:24,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:45:24,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:45:24,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:45:24,344 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,349 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,364 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]. [2025-03-17 06:45:24,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,370 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,371 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,372 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:45:24,378 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:45:24,378 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:45:24,379 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:45:24,381 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (1/1) ... [2025-03-17 06:45:24,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:24,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:45:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:45:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:45:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:45:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:45:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:45:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:45:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:45:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:45:24,432 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:45:24,513 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:45:24,515 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:45:24,719 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:45:24,719 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:45:24,881 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:45:24,882 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:45:24,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:24 BoogieIcfgContainer [2025-03-17 06:45:24,882 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:45:24,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:45:24,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:45:24,887 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:45:24,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:45:24" (1/3) ... [2025-03-17 06:45:24,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ae2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:24, skipping insertion in model container [2025-03-17 06:45:24,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:24" (2/3) ... [2025-03-17 06:45:24,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ae2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:24, skipping insertion in model container [2025-03-17 06:45:24,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:24" (3/3) ... [2025-03-17 06:45:24,889 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2025-03-17 06:45:24,901 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:45:24,902 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 25 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-17 06:45:24,903 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:45:24,936 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:45:24,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2025-03-17 06:45:24,989 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-03-17 06:45:24,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:45:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-03-17 06:45:24,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2025-03-17 06:45:25,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2025-03-17 06:45:25,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:45:25,021 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;@789c4b5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:45:25,022 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:45:25,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:45:25,034 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2025-03-17 06:45:25,034 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:45:25,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:25,035 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:25,035 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:25,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1268748653, now seen corresponding path program 1 times [2025-03-17 06:45:25,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:25,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660305068] [2025-03-17 06:45:25,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:25,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:45:25,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:45:25,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:25,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660305068] [2025-03-17 06:45:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660305068] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:25,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:25,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734082779] [2025-03-17 06:45:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:25,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:45:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:25,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:45:25,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:45:25,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:45:25,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:45:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:25,284 INFO L124 PetriNetUnfolderBase]: 87/178 cut-off events. [2025-03-17 06:45:25,284 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 06:45:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 178 events. 87/178 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 583 event pairs, 66 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 308. Up to 146 conditions per place. [2025-03-17 06:45:25,291 INFO L140 encePairwiseOnDemand]: 27/28 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2025-03-17 06:45:25,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2025-03-17 06:45:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:45:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:45:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 34 transitions. [2025-03-17 06:45:25,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-03-17 06:45:25,303 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 2 states and 34 transitions. [2025-03-17 06:45:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2025-03-17 06:45:25,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:25,309 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2025-03-17 06:45:25,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2025-03-17 06:45:25,313 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-03-17 06:45:25,313 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2025-03-17 06:45:25,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:25,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:25,313 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:25,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:45:25,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:25,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 780746483, now seen corresponding path program 1 times [2025-03-17 06:45:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:25,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582435557] [2025-03-17 06:45:25,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:25,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:25,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:45:25,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:45:25,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:25,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582435557] [2025-03-17 06:45:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582435557] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:25,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:25,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:45:25,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458121659] [2025-03-17 06:45:25,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:25,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:25,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:25,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:45:25,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:45:25,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:25,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:25,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:45:25,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:25,641 INFO L124 PetriNetUnfolderBase]: 100/213 cut-off events. [2025-03-17 06:45:25,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:45:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 213 events. 100/213 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 736 event pairs, 79 based on Foata normal form. 17/215 useless extension candidates. Maximal degree in co-relation 402. Up to 146 conditions per place. [2025-03-17 06:45:25,647 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 18 selfloop transitions, 2 changer transitions 8/33 dead transitions. [2025-03-17 06:45:25,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 128 flow [2025-03-17 06:45:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-03-17 06:45:25,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2025-03-17 06:45:25,648 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 4 states and 59 transitions. [2025-03-17 06:45:25,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 128 flow [2025-03-17 06:45:25,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:45:25,650 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 70 flow [2025-03-17 06:45:25,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2025-03-17 06:45:25,651 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2025-03-17 06:45:25,651 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 70 flow [2025-03-17 06:45:25,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:25,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:25,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:25,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:45:25,652 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:25,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1425914518, now seen corresponding path program 1 times [2025-03-17 06:45:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24063631] [2025-03-17 06:45:25,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:25,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:25,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:45:25,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:45:25,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:25,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:25,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24063631] [2025-03-17 06:45:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24063631] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:25,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:25,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:45:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198328714] [2025-03-17 06:45:25,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:25,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:45:25,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:25,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:45:25,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:45:25,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:25,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:25,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:25,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:25,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:26,125 INFO L124 PetriNetUnfolderBase]: 229/426 cut-off events. [2025-03-17 06:45:26,125 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-03-17 06:45:26,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 426 events. 229/426 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1782 event pairs, 63 based on Foata normal form. 1/425 useless extension candidates. Maximal degree in co-relation 943. Up to 155 conditions per place. [2025-03-17 06:45:26,129 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 46 selfloop transitions, 9 changer transitions 7/65 dead transitions. [2025-03-17 06:45:26,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 301 flow [2025-03-17 06:45:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:45:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:45:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2025-03-17 06:45:26,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2025-03-17 06:45:26,131 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 70 flow. Second operand 8 states and 102 transitions. [2025-03-17 06:45:26,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 301 flow [2025-03-17 06:45:26,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 65 transitions, 297 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:26,133 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 124 flow [2025-03-17 06:45:26,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-03-17 06:45:26,134 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2025-03-17 06:45:26,134 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 124 flow [2025-03-17 06:45:26,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:26,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:26,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:45:26,135 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:26,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1143503626, now seen corresponding path program 2 times [2025-03-17 06:45:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:26,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078968642] [2025-03-17 06:45:26,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:26,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:45:26,155 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:45:26,155 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:45:26,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:26,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078968642] [2025-03-17 06:45:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078968642] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:26,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059565235] [2025-03-17 06:45:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:26,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:45:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:26,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:45:26,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:45:26,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:45:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:45:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:26,275 INFO L124 PetriNetUnfolderBase]: 145/307 cut-off events. [2025-03-17 06:45:26,276 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2025-03-17 06:45:26,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 307 events. 145/307 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1171 event pairs, 37 based on Foata normal form. 6/309 useless extension candidates. Maximal degree in co-relation 796. Up to 214 conditions per place. [2025-03-17 06:45:26,280 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 26 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2025-03-17 06:45:26,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 195 flow [2025-03-17 06:45:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:45:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:45:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2025-03-17 06:45:26,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-17 06:45:26,284 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 124 flow. Second operand 3 states and 48 transitions. [2025-03-17 06:45:26,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 195 flow [2025-03-17 06:45:26,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 185 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 06:45:26,285 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 133 flow [2025-03-17 06:45:26,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2025-03-17 06:45:26,286 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2025-03-17 06:45:26,286 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 133 flow [2025-03-17 06:45:26,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:26,286 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:26,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:45:26,288 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:26,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:26,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1854148395, now seen corresponding path program 1 times [2025-03-17 06:45:26,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:26,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796740645] [2025-03-17 06:45:26,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:26,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:26,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:45:26,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:45:26,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:26,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796740645] [2025-03-17 06:45:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796740645] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660943448] [2025-03-17 06:45:26,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:26,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:26,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:45:26,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:45:26,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:45:26,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:26,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:26,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:45:26,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:26,572 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:45:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660943448] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:26,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:45:26,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-03-17 06:45:26,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308478651] [2025-03-17 06:45:26,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:26,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:26,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:26,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:45:26,574 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:45:26,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:26,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:45:26,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:26,722 INFO L124 PetriNetUnfolderBase]: 226/514 cut-off events. [2025-03-17 06:45:26,722 INFO L125 PetriNetUnfolderBase]: For 477/502 co-relation queries the response was YES. [2025-03-17 06:45:26,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 514 events. 226/514 cut-off events. For 477/502 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2446 event pairs, 49 based on Foata normal form. 16/522 useless extension candidates. Maximal degree in co-relation 1374. Up to 171 conditions per place. [2025-03-17 06:45:26,727 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 43 selfloop transitions, 7 changer transitions 3/60 dead transitions. [2025-03-17 06:45:26,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 327 flow [2025-03-17 06:45:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2025-03-17 06:45:26,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2025-03-17 06:45:26,731 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 133 flow. Second operand 4 states and 75 transitions. [2025-03-17 06:45:26,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 327 flow [2025-03-17 06:45:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 304 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-03-17 06:45:26,736 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 156 flow [2025-03-17 06:45:26,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2025-03-17 06:45:26,737 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2025-03-17 06:45:26,739 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 156 flow [2025-03-17 06:45:26,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:26,739 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:26,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:45:26,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:26,940 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:26,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 967022467, now seen corresponding path program 1 times [2025-03-17 06:45:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:26,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723837759] [2025-03-17 06:45:26,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:26,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:45:26,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:45:26,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:26,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:27,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:27,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723837759] [2025-03-17 06:45:27,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723837759] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:27,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862417212] [2025-03-17 06:45:27,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:27,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:27,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:45:27,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:45:27,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:45:27,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:27,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:45:27,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:27,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862417212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:27,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:27,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 06:45:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85212965] [2025-03-17 06:45:27,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:27,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:45:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:27,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:45:27,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:45:27,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:45:27,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 156 flow. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:27,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:45:27,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:27,517 INFO L124 PetriNetUnfolderBase]: 241/555 cut-off events. [2025-03-17 06:45:27,521 INFO L125 PetriNetUnfolderBase]: For 757/792 co-relation queries the response was YES. [2025-03-17 06:45:27,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1578 conditions, 555 events. 241/555 cut-off events. For 757/792 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2713 event pairs, 160 based on Foata normal form. 24/563 useless extension candidates. Maximal degree in co-relation 1567. Up to 353 conditions per place. [2025-03-17 06:45:27,527 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 25 selfloop transitions, 3 changer transitions 17/52 dead transitions. [2025-03-17 06:45:27,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 314 flow [2025-03-17 06:45:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:45:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:45:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2025-03-17 06:45:27,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-17 06:45:27,528 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 156 flow. Second operand 6 states and 81 transitions. [2025-03-17 06:45:27,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 314 flow [2025-03-17 06:45:27,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 298 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:27,530 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 170 flow [2025-03-17 06:45:27,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2025-03-17 06:45:27,531 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2025-03-17 06:45:27,531 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 170 flow [2025-03-17 06:45:27,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:27,531 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] [2025-03-17 06:45:27,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:45:27,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 06:45:27,732 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:27,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1698444770, now seen corresponding path program 2 times [2025-03-17 06:45:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:27,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922687823] [2025-03-17 06:45:27,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:27,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:45:27,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 24 statements. [2025-03-17 06:45:27,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:45:27,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922687823] [2025-03-17 06:45:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922687823] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:27,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:27,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:45:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836513048] [2025-03-17 06:45:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:27,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:45:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:27,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:45:27,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:45:27,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:45:27,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2025-03-17 06:45:27,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:27,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:45:27,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:27,992 INFO L124 PetriNetUnfolderBase]: 312/608 cut-off events. [2025-03-17 06:45:27,992 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2025-03-17 06:45:27,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 608 events. 312/608 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2515 event pairs, 43 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 1681. Up to 239 conditions per place. [2025-03-17 06:45:27,997 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-03-17 06:45:27,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 418 flow [2025-03-17 06:45:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:45:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:45:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2025-03-17 06:45:28,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2025-03-17 06:45:28,000 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 170 flow. Second operand 6 states and 73 transitions. [2025-03-17 06:45:28,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 418 flow [2025-03-17 06:45:28,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 388 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:28,003 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 197 flow [2025-03-17 06:45:28,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2025-03-17 06:45:28,004 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2025-03-17 06:45:28,004 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 197 flow [2025-03-17 06:45:28,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2025-03-17 06:45:28,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:28,004 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:28,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:45:28,004 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:28,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -925231223, now seen corresponding path program 1 times [2025-03-17 06:45:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990910506] [2025-03-17 06:45:28,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:28,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:45:28,030 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:28,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:28,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990910506] [2025-03-17 06:45:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990910506] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796165134] [2025-03-17 06:45:28,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:28,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:28,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:28,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:28,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:45:28,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:45:28,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:28,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:28,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:28,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-17 06:45:28,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:29,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:29,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:29,664 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 [2025-03-17 06:45:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796165134] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2025-03-17 06:45:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493778847] [2025-03-17 06:45:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:29,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-17 06:45:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:29,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-17 06:45:29,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 06:45:30,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:30,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 197 flow. Second operand has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:30,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:30,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:30,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:33,294 INFO L124 PetriNetUnfolderBase]: 1236/2153 cut-off events. [2025-03-17 06:45:33,295 INFO L125 PetriNetUnfolderBase]: For 2272/2272 co-relation queries the response was YES. [2025-03-17 06:45:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6549 conditions, 2153 events. 1236/2153 cut-off events. For 2272/2272 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10976 event pairs, 73 based on Foata normal form. 3/2156 useless extension candidates. Maximal degree in co-relation 6536. Up to 640 conditions per place. [2025-03-17 06:45:33,313 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 206 selfloop transitions, 108 changer transitions 30/345 dead transitions. [2025-03-17 06:45:33,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 345 transitions, 2098 flow [2025-03-17 06:45:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-17 06:45:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2025-03-17 06:45:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 483 transitions. [2025-03-17 06:45:33,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2025-03-17 06:45:33,318 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 197 flow. Second operand 54 states and 483 transitions. [2025-03-17 06:45:33,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 345 transitions, 2098 flow [2025-03-17 06:45:33,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 345 transitions, 2078 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 06:45:33,329 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1217 flow [2025-03-17 06:45:33,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1217, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2025-03-17 06:45:33,330 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2025-03-17 06:45:33,330 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1217 flow [2025-03-17 06:45:33,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:33,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:33,330 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:33,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:45:33,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:33,536 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:33,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1040869229, now seen corresponding path program 2 times [2025-03-17 06:45:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:33,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740144658] [2025-03-17 06:45:33,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:33,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:33,546 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:33,565 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:33,566 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:33,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740144658] [2025-03-17 06:45:34,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740144658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189769527] [2025-03-17 06:45:34,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:34,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:34,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:45:34,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:34,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:34,125 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:34,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:34,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-17 06:45:34,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:34,368 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 [2025-03-17 06:45:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:34,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:34,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:34,676 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 [2025-03-17 06:45:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:34,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189769527] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:34,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:34,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-03-17 06:45:34,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50763612] [2025-03-17 06:45:34,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:34,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-17 06:45:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:34,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-17 06:45:34,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 06:45:34,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:34,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1217 flow. Second operand has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 42 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:34,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:34,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:38,088 INFO L124 PetriNetUnfolderBase]: 2006/3467 cut-off events. [2025-03-17 06:45:38,089 INFO L125 PetriNetUnfolderBase]: For 14348/14348 co-relation queries the response was YES. [2025-03-17 06:45:38,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15421 conditions, 3467 events. 2006/3467 cut-off events. For 14348/14348 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19767 event pairs, 91 based on Foata normal form. 4/3468 useless extension candidates. Maximal degree in co-relation 15384. Up to 1065 conditions per place. [2025-03-17 06:45:38,112 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 208 selfloop transitions, 306 changer transitions 55/570 dead transitions. [2025-03-17 06:45:38,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 570 transitions, 5390 flow [2025-03-17 06:45:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-17 06:45:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2025-03-17 06:45:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 569 transitions. [2025-03-17 06:45:38,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32776497695852536 [2025-03-17 06:45:38,115 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1217 flow. Second operand 62 states and 569 transitions. [2025-03-17 06:45:38,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 570 transitions, 5390 flow [2025-03-17 06:45:38,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 570 transitions, 5150 flow, removed 117 selfloop flow, removed 5 redundant places. [2025-03-17 06:45:38,165 INFO L231 Difference]: Finished difference. Result has 198 places, 379 transitions, 4358 flow [2025-03-17 06:45:38,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=4358, PETRI_PLACES=198, PETRI_TRANSITIONS=379} [2025-03-17 06:45:38,166 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 170 predicate places. [2025-03-17 06:45:38,166 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 379 transitions, 4358 flow [2025-03-17 06:45:38,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 42 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:38,166 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:38,166 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:38,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:45:38,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:38,373 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:38,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -908167901, now seen corresponding path program 3 times [2025-03-17 06:45:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971781140] [2025-03-17 06:45:38,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:38,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:38,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:38,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:45:38,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:38,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:38,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971781140] [2025-03-17 06:45:38,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971781140] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:38,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407468767] [2025-03-17 06:45:38,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:38,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:38,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:38,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:38,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:45:38,997 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:39,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:39,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:45:39,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:39,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 06:45:39,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:39,287 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 [2025-03-17 06:45:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:39,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:39,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:39,605 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 [2025-03-17 06:45:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:39,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407468767] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:39,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:39,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-03-17 06:45:39,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850895451] [2025-03-17 06:45:39,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:39,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-17 06:45:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:39,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-17 06:45:39,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 06:45:39,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:39,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 379 transitions, 4358 flow. Second operand has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 42 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:39,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:39,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:47,740 INFO L124 PetriNetUnfolderBase]: 4872/8404 cut-off events. [2025-03-17 06:45:47,740 INFO L125 PetriNetUnfolderBase]: For 93563/93563 co-relation queries the response was YES. [2025-03-17 06:45:47,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50606 conditions, 8404 events. 4872/8404 cut-off events. For 93563/93563 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 56981 event pairs, 107 based on Foata normal form. 14/8414 useless extension candidates. Maximal degree in co-relation 50548. Up to 1784 conditions per place. [2025-03-17 06:45:47,824 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 486 selfloop transitions, 851 changer transitions 131/1469 dead transitions. [2025-03-17 06:45:47,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1469 transitions, 19302 flow [2025-03-17 06:45:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2025-03-17 06:45:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2025-03-17 06:45:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 1156 transitions. [2025-03-17 06:45:47,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3276643990929705 [2025-03-17 06:45:47,830 INFO L175 Difference]: Start difference. First operand has 198 places, 379 transitions, 4358 flow. Second operand 126 states and 1156 transitions. [2025-03-17 06:45:47,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1469 transitions, 19302 flow [2025-03-17 06:45:48,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1469 transitions, 16714 flow, removed 1254 selfloop flow, removed 25 redundant places. [2025-03-17 06:45:48,793 INFO L231 Difference]: Finished difference. Result has 356 places, 1002 transitions, 13640 flow [2025-03-17 06:45:48,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=13640, PETRI_PLACES=356, PETRI_TRANSITIONS=1002} [2025-03-17 06:45:48,794 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 328 predicate places. [2025-03-17 06:45:48,794 INFO L471 AbstractCegarLoop]: Abstraction has has 356 places, 1002 transitions, 13640 flow [2025-03-17 06:45:48,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 42 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:48,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:48,795 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:48,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:45:48,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 06:45:48,995 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:48,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 502488371, now seen corresponding path program 4 times [2025-03-17 06:45:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:48,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236552394] [2025-03-17 06:45:48,996 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:49,002 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:49,018 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:49,018 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:49,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236552394] [2025-03-17 06:45:49,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236552394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008904285] [2025-03-17 06:45:49,497 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:49,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:49,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:49,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:45:49,540 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:49,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:49,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:49,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:49,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 06:45:49,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:49,715 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 [2025-03-17 06:45:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:49,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:50,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:50,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-03-17 06:45:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008904285] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:50,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:50,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2025-03-17 06:45:50,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942521183] [2025-03-17 06:45:50,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:50,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-17 06:45:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:50,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-17 06:45:50,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2025-03-17 06:45:50,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:50,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1002 transitions, 13640 flow. Second operand has 43 states, 43 states have (on average 4.674418604651163) internal successors, (201), 43 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:50,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:50,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:57,892 INFO L124 PetriNetUnfolderBase]: 6437/11242 cut-off events. [2025-03-17 06:45:57,892 INFO L125 PetriNetUnfolderBase]: For 409636/409636 co-relation queries the response was YES. [2025-03-17 06:45:57,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88453 conditions, 11242 events. 6437/11242 cut-off events. For 409636/409636 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 80444 event pairs, 264 based on Foata normal form. 17/11256 useless extension candidates. Maximal degree in co-relation 88336. Up to 4003 conditions per place. [2025-03-17 06:45:58,029 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 837 selfloop transitions, 840 changer transitions 158/1836 dead transitions. [2025-03-17 06:45:58,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1836 transitions, 29009 flow [2025-03-17 06:45:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-03-17 06:45:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2025-03-17 06:45:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 857 transitions. [2025-03-17 06:45:58,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31231778425655976 [2025-03-17 06:45:58,031 INFO L175 Difference]: Start difference. First operand has 356 places, 1002 transitions, 13640 flow. Second operand 98 states and 857 transitions. [2025-03-17 06:45:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1836 transitions, 29009 flow [2025-03-17 06:46:01,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1836 transitions, 26974 flow, removed 966 selfloop flow, removed 27 redundant places. [2025-03-17 06:46:01,145 INFO L231 Difference]: Finished difference. Result has 449 places, 1383 transitions, 21503 flow [2025-03-17 06:46:01,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=12371, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=21503, PETRI_PLACES=449, PETRI_TRANSITIONS=1383} [2025-03-17 06:46:01,149 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 421 predicate places. [2025-03-17 06:46:01,150 INFO L471 AbstractCegarLoop]: Abstraction has has 449 places, 1383 transitions, 21503 flow [2025-03-17 06:46:01,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.674418604651163) internal successors, (201), 43 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:01,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:01,152 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:01,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:46:01,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:01,353 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:01,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1235364950, now seen corresponding path program 5 times [2025-03-17 06:46:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877393174] [2025-03-17 06:46:01,356 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:46:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:01,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:46:01,393 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:01,398 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:46:01,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:46:02,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:02,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877393174] [2025-03-17 06:46:02,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877393174] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:02,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858213716] [2025-03-17 06:46:02,181 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:46:02,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:02,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:02,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:02,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:46:02,226 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:46:02,245 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:02,246 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:46:02,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:02,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:46:02,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:02,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:02,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:46:02,652 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 [2025-03-17 06:46:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858213716] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:46:02,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:46:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2025-03-17 06:46:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843199484] [2025-03-17 06:46:02,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:46:02,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-17 06:46:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:02,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-17 06:46:02,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 06:46:02,749 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:46:02,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1383 transitions, 21503 flow. Second operand has 36 states, 36 states have (on average 4.888888888888889) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:02,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:02,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:46:02,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:06,430 INFO L124 PetriNetUnfolderBase]: 6013/10490 cut-off events. [2025-03-17 06:46:06,431 INFO L125 PetriNetUnfolderBase]: For 424334/424334 co-relation queries the response was YES. [2025-03-17 06:46:06,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87190 conditions, 10490 events. 6013/10490 cut-off events. For 424334/424334 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 74443 event pairs, 636 based on Foata normal form. 1/10490 useless extension candidates. Maximal degree in co-relation 87049. Up to 5516 conditions per place. [2025-03-17 06:46:06,571 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 830 selfloop transitions, 671 changer transitions 18/1520 dead transitions. [2025-03-17 06:46:06,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1520 transitions, 26666 flow [2025-03-17 06:46:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 06:46:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 06:46:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2025-03-17 06:46:06,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3267857142857143 [2025-03-17 06:46:06,573 INFO L175 Difference]: Start difference. First operand has 449 places, 1383 transitions, 21503 flow. Second operand 20 states and 183 transitions. [2025-03-17 06:46:06,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1520 transitions, 26666 flow [2025-03-17 06:46:10,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1520 transitions, 24669 flow, removed 777 selfloop flow, removed 24 redundant places. [2025-03-17 06:46:10,678 INFO L231 Difference]: Finished difference. Result has 434 places, 1409 transitions, 22540 flow [2025-03-17 06:46:10,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=19813, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22540, PETRI_PLACES=434, PETRI_TRANSITIONS=1409} [2025-03-17 06:46:10,679 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 406 predicate places. [2025-03-17 06:46:10,679 INFO L471 AbstractCegarLoop]: Abstraction has has 434 places, 1409 transitions, 22540 flow [2025-03-17 06:46:10,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.888888888888889) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:10,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:10,679 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:10,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:46:10,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:10,880 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:10,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1561149916, now seen corresponding path program 6 times [2025-03-17 06:46:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718602323] [2025-03-17 06:46:10,881 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:46:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:10,897 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:46:10,924 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:10,928 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:46:10,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718602323] [2025-03-17 06:46:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718602323] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153591690] [2025-03-17 06:46:11,203 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:46:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:11,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:46:11,279 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:46:11,309 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:11,309 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:46:11,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:11,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:46:11,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:11,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:11,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:46:11,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 06:46:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:11,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153591690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:46:11,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:46:11,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 22 [2025-03-17 06:46:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229710343] [2025-03-17 06:46:11,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:46:11,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:46:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:11,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:46:11,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:46:11,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:46:11,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1409 transitions, 22540 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:11,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:11,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:46:11,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:15,166 INFO L124 PetriNetUnfolderBase]: 5997/10458 cut-off events. [2025-03-17 06:46:15,167 INFO L125 PetriNetUnfolderBase]: For 369524/369524 co-relation queries the response was YES. [2025-03-17 06:46:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85379 conditions, 10458 events. 5997/10458 cut-off events. For 369524/369524 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 74141 event pairs, 625 based on Foata normal form. 1/10458 useless extension candidates. Maximal degree in co-relation 85241. Up to 5350 conditions per place. [2025-03-17 06:46:15,329 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 739 selfloop transitions, 766 changer transitions 25/1531 dead transitions. [2025-03-17 06:46:15,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1531 transitions, 27068 flow [2025-03-17 06:46:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 06:46:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 06:46:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 210 transitions. [2025-03-17 06:46:15,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2025-03-17 06:46:15,330 INFO L175 Difference]: Start difference. First operand has 434 places, 1409 transitions, 22540 flow. Second operand 23 states and 210 transitions. [2025-03-17 06:46:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1531 transitions, 27068 flow [2025-03-17 06:46:18,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1531 transitions, 26972 flow, removed 28 selfloop flow, removed 12 redundant places. [2025-03-17 06:46:18,865 INFO L231 Difference]: Finished difference. Result has 448 places, 1422 transitions, 24350 flow [2025-03-17 06:46:18,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=22460, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24350, PETRI_PLACES=448, PETRI_TRANSITIONS=1422} [2025-03-17 06:46:18,866 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 420 predicate places. [2025-03-17 06:46:18,867 INFO L471 AbstractCegarLoop]: Abstraction has has 448 places, 1422 transitions, 24350 flow [2025-03-17 06:46:18,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:18,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:18,867 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:18,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 06:46:19,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 06:46:19,068 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:19,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 243319114, now seen corresponding path program 7 times [2025-03-17 06:46:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598452587] [2025-03-17 06:46:19,069 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:46:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:19,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:46:19,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:19,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:46:19,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:46:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598452587] [2025-03-17 06:46:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598452587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039701274] [2025-03-17 06:46:19,550 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:46:19,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:19,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:19,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:46:19,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:46:19,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:46:19,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:46:19,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:19,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:46:19,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:19,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:20,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:46:20,015 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 [2025-03-17 06:46:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039701274] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:46:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17, 12] total 35 [2025-03-17 06:46:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343937991] [2025-03-17 06:46:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:46:20,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 06:46:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:20,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 06:46:20,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 06:46:20,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:46:20,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1422 transitions, 24350 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:20,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:20,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:46:20,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:23,643 INFO L124 PetriNetUnfolderBase]: 6005/10469 cut-off events. [2025-03-17 06:46:23,643 INFO L125 PetriNetUnfolderBase]: For 374929/374929 co-relation queries the response was YES. [2025-03-17 06:46:23,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88231 conditions, 10469 events. 6005/10469 cut-off events. For 374929/374929 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 73916 event pairs, 618 based on Foata normal form. 1/10469 useless extension candidates. Maximal degree in co-relation 88092. Up to 6293 conditions per place. [2025-03-17 06:46:23,807 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 790 selfloop transitions, 758 changer transitions 18/1567 dead transitions. [2025-03-17 06:46:23,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1567 transitions, 29534 flow [2025-03-17 06:46:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:46:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:46:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 136 transitions. [2025-03-17 06:46:23,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2025-03-17 06:46:23,808 INFO L175 Difference]: Start difference. First operand has 448 places, 1422 transitions, 24350 flow. Second operand 14 states and 136 transitions. [2025-03-17 06:46:23,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1567 transitions, 29534 flow [2025-03-17 06:46:27,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1567 transitions, 28792 flow, removed 13 selfloop flow, removed 13 redundant places. [2025-03-17 06:46:27,395 INFO L231 Difference]: Finished difference. Result has 451 places, 1452 transitions, 27245 flow [2025-03-17 06:46:27,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=23660, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=27245, PETRI_PLACES=451, PETRI_TRANSITIONS=1452} [2025-03-17 06:46:27,396 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 423 predicate places. [2025-03-17 06:46:27,396 INFO L471 AbstractCegarLoop]: Abstraction has has 451 places, 1452 transitions, 27245 flow [2025-03-17 06:46:27,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:27,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:27,396 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:27,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 06:46:27,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 06:46:27,597 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:27,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 397864748, now seen corresponding path program 8 times [2025-03-17 06:46:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:27,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411068390] [2025-03-17 06:46:27,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:46:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:27,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:46:27,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 28 statements. [2025-03-17 06:46:27,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:46:27,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411068390] [2025-03-17 06:46:27,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411068390] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:46:27,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:46:27,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-17 06:46:27,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955011893] [2025-03-17 06:46:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:46:27,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:46:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:27,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:46:27,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:46:27,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:46:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1452 transitions, 27245 flow. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:46:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:31,477 INFO L124 PetriNetUnfolderBase]: 5338/9726 cut-off events. [2025-03-17 06:46:31,477 INFO L125 PetriNetUnfolderBase]: For 377453/377780 co-relation queries the response was YES. [2025-03-17 06:46:31,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85849 conditions, 9726 events. 5338/9726 cut-off events. For 377453/377780 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 72157 event pairs, 688 based on Foata normal form. 18/9694 useless extension candidates. Maximal degree in co-relation 85706. Up to 8499 conditions per place. [2025-03-17 06:46:31,611 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 1282 selfloop transitions, 28 changer transitions 22/1498 dead transitions. [2025-03-17 06:46:31,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1498 transitions, 30592 flow [2025-03-17 06:46:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:46:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:46:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2025-03-17 06:46:31,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-17 06:46:31,612 INFO L175 Difference]: Start difference. First operand has 451 places, 1452 transitions, 27245 flow. Second operand 12 states and 120 transitions. [2025-03-17 06:46:31,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1498 transitions, 30592 flow [2025-03-17 06:46:34,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1498 transitions, 30498 flow, removed 25 selfloop flow, removed 8 redundant places. [2025-03-17 06:46:34,796 INFO L231 Difference]: Finished difference. Result has 457 places, 1456 transitions, 27326 flow [2025-03-17 06:46:34,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=27155, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27326, PETRI_PLACES=457, PETRI_TRANSITIONS=1456} [2025-03-17 06:46:34,797 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 429 predicate places. [2025-03-17 06:46:34,797 INFO L471 AbstractCegarLoop]: Abstraction has has 457 places, 1456 transitions, 27326 flow [2025-03-17 06:46:34,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:34,797 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:34,797 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:34,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 06:46:34,798 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:34,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1516252822, now seen corresponding path program 9 times [2025-03-17 06:46:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605347354] [2025-03-17 06:46:34,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:46:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:34,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:46:34,809 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 28 statements. [2025-03-17 06:46:34,809 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:46:34,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:46:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605347354] [2025-03-17 06:46:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605347354] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:46:34,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:46:34,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-17 06:46:34,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716721499] [2025-03-17 06:46:34,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:46:34,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:46:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:34,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:46:34,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:46:34,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:46:34,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1456 transitions, 27326 flow. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:34,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:34,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:46:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:38,729 INFO L124 PetriNetUnfolderBase]: 5341/9727 cut-off events. [2025-03-17 06:46:38,729 INFO L125 PetriNetUnfolderBase]: For 383911/384282 co-relation queries the response was YES. [2025-03-17 06:46:38,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86215 conditions, 9727 events. 5341/9727 cut-off events. For 383911/384282 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 72178 event pairs, 688 based on Foata normal form. 24/9697 useless extension candidates. Maximal degree in co-relation 86068. Up to 8462 conditions per place. [2025-03-17 06:46:38,877 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 1287 selfloop transitions, 45 changer transitions 17/1515 dead transitions. [2025-03-17 06:46:38,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1515 transitions, 30997 flow [2025-03-17 06:46:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:46:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:46:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2025-03-17 06:46:38,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-03-17 06:46:38,878 INFO L175 Difference]: Start difference. First operand has 457 places, 1456 transitions, 27326 flow. Second operand 12 states and 120 transitions. [2025-03-17 06:46:38,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1515 transitions, 30997 flow [2025-03-17 06:46:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1515 transitions, 30935 flow, removed 12 selfloop flow, removed 10 redundant places. [2025-03-17 06:46:42,675 INFO L231 Difference]: Finished difference. Result has 458 places, 1468 transitions, 27685 flow [2025-03-17 06:46:42,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=27272, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27685, PETRI_PLACES=458, PETRI_TRANSITIONS=1468} [2025-03-17 06:46:42,677 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 430 predicate places. [2025-03-17 06:46:42,677 INFO L471 AbstractCegarLoop]: Abstraction has has 458 places, 1468 transitions, 27685 flow [2025-03-17 06:46:42,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:42,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:42,678 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:42,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 06:46:42,678 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:42,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2032985190, now seen corresponding path program 10 times [2025-03-17 06:46:42,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:42,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184927895] [2025-03-17 06:46:42,679 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:46:42,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:42,686 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-17 06:46:42,691 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:46:42,692 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:46:42,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184927895] [2025-03-17 06:46:42,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184927895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845749800] [2025-03-17 06:46:42,781 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:46:42,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:42,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:42,784 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:42,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:46:42,840 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-17 06:46:42,865 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:46:42,865 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:46:42,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:42,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:46:42,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:42,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:46:43,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845749800] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:46:43,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:46:43,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-17 06:46:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208402300] [2025-03-17 06:46:43,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:46:43,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:46:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:43,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:46:43,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:46:43,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:46:43,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1468 transitions, 27685 flow. Second operand has 18 states, 18 states have (on average 9.5) internal successors, (171), 18 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:43,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:43,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:46:43,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:44,047 INFO L124 PetriNetUnfolderBase]: 1311/2890 cut-off events. [2025-03-17 06:46:44,047 INFO L125 PetriNetUnfolderBase]: For 180040/180258 co-relation queries the response was YES. [2025-03-17 06:46:44,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30508 conditions, 2890 events. 1311/2890 cut-off events. For 180040/180258 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20969 event pairs, 365 based on Foata normal form. 458/3307 useless extension candidates. Maximal degree in co-relation 30362. Up to 918 conditions per place. [2025-03-17 06:46:44,100 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 143 selfloop transitions, 7 changer transitions 277/492 dead transitions. [2025-03-17 06:46:44,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 492 transitions, 10094 flow [2025-03-17 06:46:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:46:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:46:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2025-03-17 06:46:44,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2025-03-17 06:46:44,101 INFO L175 Difference]: Start difference. First operand has 458 places, 1468 transitions, 27685 flow. Second operand 8 states and 109 transitions. [2025-03-17 06:46:44,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 492 transitions, 10094 flow [2025-03-17 06:46:45,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 492 transitions, 9369 flow, removed 150 selfloop flow, removed 74 redundant places. [2025-03-17 06:46:45,060 INFO L231 Difference]: Finished difference. Result has 307 places, 198 transitions, 3515 flow [2025-03-17 06:46:45,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3515, PETRI_PLACES=307, PETRI_TRANSITIONS=198} [2025-03-17 06:46:45,063 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 279 predicate places. [2025-03-17 06:46:45,063 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 198 transitions, 3515 flow [2025-03-17 06:46:45,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.5) internal successors, (171), 18 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:45,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:45,063 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:45,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 06:46:45,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 06:46:45,264 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:45,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -307425210, now seen corresponding path program 11 times [2025-03-17 06:46:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764694297] [2025-03-17 06:46:45,265 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:46:45,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:45,268 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-03-17 06:46:45,272 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:46:45,272 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:46:45,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:46:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764694297] [2025-03-17 06:46:45,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764694297] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055220006] [2025-03-17 06:46:45,305 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:46:45,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:45,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:45,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:46:45,349 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-03-17 06:46:45,364 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:46:45,364 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:46:45,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:45,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:46:45,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:46:45,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:46:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055220006] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:46:45,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:46:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-03-17 06:46:45,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121747261] [2025-03-17 06:46:45,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:46:45,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:46:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:45,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:46:45,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:46:45,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2025-03-17 06:46:45,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 198 transitions, 3515 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:45,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:45,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2025-03-17 06:46:45,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:45,780 INFO L124 PetriNetUnfolderBase]: 1175/2361 cut-off events. [2025-03-17 06:46:45,780 INFO L125 PetriNetUnfolderBase]: For 71667/71682 co-relation queries the response was YES. [2025-03-17 06:46:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21042 conditions, 2361 events. 1175/2361 cut-off events. For 71667/71682 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14210 event pairs, 141 based on Foata normal form. 22/2336 useless extension candidates. Maximal degree in co-relation 20949. Up to 681 conditions per place. [2025-03-17 06:46:45,806 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 137 selfloop transitions, 75 changer transitions 25/292 dead transitions. [2025-03-17 06:46:45,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 5409 flow [2025-03-17 06:46:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:46:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:46:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-17 06:46:45,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2025-03-17 06:46:45,807 INFO L175 Difference]: Start difference. First operand has 307 places, 198 transitions, 3515 flow. Second operand 5 states and 96 transitions. [2025-03-17 06:46:45,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 5409 flow [2025-03-17 06:46:45,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 292 transitions, 4424 flow, removed 212 selfloop flow, removed 63 redundant places. [2025-03-17 06:46:45,976 INFO L231 Difference]: Finished difference. Result has 162 places, 210 transitions, 3291 flow [2025-03-17 06:46:45,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3291, PETRI_PLACES=162, PETRI_TRANSITIONS=210} [2025-03-17 06:46:45,977 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 134 predicate places. [2025-03-17 06:46:45,977 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 210 transitions, 3291 flow [2025-03-17 06:46:45,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:45,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:45,977 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:45,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 06:46:46,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 06:46:46,178 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:46,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1167664601, now seen corresponding path program 12 times [2025-03-17 06:46:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532728553] [2025-03-17 06:46:46,178 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:46:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:46,188 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 3 equivalence classes. [2025-03-17 06:46:46,202 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:46:46,205 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:46:46,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:46:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:46:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532728553] [2025-03-17 06:46:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532728553] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:46:46,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128517583] [2025-03-17 06:46:46,516 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:46:46,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:46,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:46:46,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:46:46,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:46:46,569 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 3 equivalence classes. [2025-03-17 06:46:46,609 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:46:46,609 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:46:46,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:46:46,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:46:46,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:46:46,956 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:46:46,956 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 [2025-03-17 06:46:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:46:46,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:46:47,111 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:46:47,111 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 [2025-03-17 06:46:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:46:47,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128517583] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:46:47,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:46:47,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2025-03-17 06:46:47,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583590264] [2025-03-17 06:46:47,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:46:47,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 06:46:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:46:47,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 06:46:47,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2025-03-17 06:46:47,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:46:47,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 210 transitions, 3291 flow. Second operand has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:47,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:47,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:46:47,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:50,772 INFO L124 PetriNetUnfolderBase]: 6202/11550 cut-off events. [2025-03-17 06:46:50,772 INFO L125 PetriNetUnfolderBase]: For 138573/138959 co-relation queries the response was YES. [2025-03-17 06:46:50,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83906 conditions, 11550 events. 6202/11550 cut-off events. For 138573/138959 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 84139 event pairs, 767 based on Foata normal form. 657/12180 useless extension candidates. Maximal degree in co-relation 83854. Up to 3409 conditions per place. [2025-03-17 06:46:50,886 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 628 selfloop transitions, 514 changer transitions 12/1189 dead transitions. [2025-03-17 06:46:50,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 1189 transitions, 20531 flow [2025-03-17 06:46:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-17 06:46:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-03-17 06:46:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 637 transitions. [2025-03-17 06:46:50,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2025-03-17 06:46:50,887 INFO L175 Difference]: Start difference. First operand has 162 places, 210 transitions, 3291 flow. Second operand 48 states and 637 transitions. [2025-03-17 06:46:50,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 1189 transitions, 20531 flow [2025-03-17 06:46:51,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 1189 transitions, 18415 flow, removed 403 selfloop flow, removed 15 redundant places. [2025-03-17 06:46:51,639 INFO L231 Difference]: Finished difference. Result has 209 places, 739 transitions, 13939 flow [2025-03-17 06:46:51,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=13939, PETRI_PLACES=209, PETRI_TRANSITIONS=739} [2025-03-17 06:46:51,640 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 181 predicate places. [2025-03-17 06:46:51,640 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 739 transitions, 13939 flow [2025-03-17 06:46:51,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:51,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:46:51,640 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:46:51,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 06:46:51,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:46:51,841 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:46:51,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:46:51,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1231004807, now seen corresponding path program 13 times [2025-03-17 06:46:51,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:46:51,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363093077] [2025-03-17 06:46:51,842 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:46:51,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:46:51,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:46:51,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:46:51,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:46:51,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat