/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread/queue_ok_longest.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:46:30,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:46:30,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 23:46:30,393 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:46:30,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:46:30,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:46:30,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:46:30,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:46:30,408 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:46:30,408 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:46:30,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:46:30,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:46:30,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:46:30,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:46:30,409 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:46:30,410 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:30,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:30,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:46:30,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:46:30,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:46:30,411 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:46:30,411 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-13 23:46:30,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:46:30,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:46:30,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:46:30,647 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:46:30,649 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:46:30,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longest.i [2025-04-13 23:46:31,882 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22122401/76c884a3fd9c4b94bcfbdf7f71b14596/FLAGf757915f6 [2025-04-13 23:46:32,163 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:46:32,164 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i [2025-04-13 23:46:32,180 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22122401/76c884a3fd9c4b94bcfbdf7f71b14596/FLAGf757915f6 [2025-04-13 23:46:32,884 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22122401/76c884a3fd9c4b94bcfbdf7f71b14596 [2025-04-13 23:46:32,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:46:32,887 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:46:32,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:46:32,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:46:32,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:46:32,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:46:32" (1/1) ... [2025-04-13 23:46:32,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562fb16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:32, skipping insertion in model container [2025-04-13 23:46:32,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:46:32" (1/1) ... [2025-04-13 23:46:32,919 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:46:33,299 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2025-04-13 23:46:33,304 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2025-04-13 23:46:33,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:46:33,359 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:46:33,405 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2025-04-13 23:46:33,406 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2025-04-13 23:46:33,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:46:33,521 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:46:33,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33 WrapperNode [2025-04-13 23:46:33,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:46:33,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:46:33,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:46:33,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:46:33,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,684 INFO L138 Inliner]: procedures = 274, calls = 1652, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 1791 [2025-04-13 23:46:33,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:46:33,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:46:33,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:46:33,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:46:33,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,706 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,749 INFO L175 MemorySlicer]: Split 1635 memory accesses to 4 slices as follows [2, 5, 802, 826]. 51 percent of accesses are in the largest equivalence class. The 1610 initializations are split as follows [2, 5, 800, 803]. The 11 writes are split as follows [0, 0, 1, 10]. [2025-04-13 23:46:33,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,780 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:46:33,808 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:46:33,808 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:46:33,808 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:46:33,809 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (1/1) ... [2025-04-13 23:46:33,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:33,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:33,834 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) [2025-04-13 23:46:33,836 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 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:46:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:46:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 23:46:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 23:46:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:46:33,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:46:33,856 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:46:33,986 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:46:33,988 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:46:35,473 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:46:35,474 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:46:35,474 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:47:20,169 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:47:20,190 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:47:20,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:47:20 BoogieIcfgContainer [2025-04-13 23:47:20,190 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:47:20,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:47:20,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:47:20,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:47:20,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:46:32" (1/3) ... [2025-04-13 23:47:20,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8e8c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:47:20, skipping insertion in model container [2025-04-13 23:47:20,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:33" (2/3) ... [2025-04-13 23:47:20,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8e8c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:47:20, skipping insertion in model container [2025-04-13 23:47:20,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:47:20" (3/3) ... [2025-04-13 23:47:20,197 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2025-04-13 23:47:20,208 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:47:20,209 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longest.i that has 3 procedures, 24 locations, 24 edges, 1 initial locations, 2 loop locations, and 2 error locations. [2025-04-13 23:47:20,209 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:47:20,330 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 23:47:20,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 23:47:20,453 INFO L116 PetriNetUnfolderBase]: 5/27 cut-off events. [2025-04-13 23:47:20,454 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:47:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-04-13 23:47:20,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 23:47:20,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 59 flow [2025-04-13 23:47:20,467 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:47:20,481 INFO L340 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;@2c574455, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:47:20,481 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 23:47:20,482 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:47:20,482 INFO L116 PetriNetUnfolderBase]: 0/0 cut-off events. [2025-04-13 23:47:20,482 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:47:20,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:20,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1] [2025-04-13 23:47:20,483 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:20,486 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 3684, now seen corresponding path program 1 times [2025-04-13 23:47:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:20,492 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159537969] [2025-04-13 23:47:20,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:20,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-13 23:47:20,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-13 23:47:20,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:20,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:20,738 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159537969] [2025-04-13 23:47:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159537969] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:20,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2025-04-13 23:47:20,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544065572] [2025-04-13 23:47:20,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:20,745 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 23:47:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:20,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 23:47:20,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 23:47:20,767 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:20,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 59 flow. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:20,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:20,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:20,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:21,117 INFO L116 PetriNetUnfolderBase]: 239/374 cut-off events. [2025-04-13 23:47:21,117 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 23:47:21,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 374 events. 239/374 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1114 event pairs, 158 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 722. Up to 375 conditions per place. [2025-04-13 23:47:21,122 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 20 selfloop transitions, 0 changer transitions 4/24 dead transitions. [2025-04-13 23:47:21,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 105 flow [2025-04-13 23:47:21,124 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 23:47:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 23:47:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 29 transitions. [2025-04-13 23:47:21,133 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 23:47:21,134 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 59 flow. Second operand 2 states and 29 transitions. [2025-04-13 23:47:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 105 flow [2025-04-13 23:47:21,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 23:47:21,140 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 44 flow [2025-04-13 23:47:21,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, 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=44, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2025-04-13 23:47:21,146 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 23:47:21,147 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 44 flow [2025-04-13 23:47:21,147 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:21,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:21,147 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:21,147 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:47:21,147 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:21,148 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -566875730, now seen corresponding path program 1 times [2025-04-13 23:47:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:21,149 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863432591] [2025-04-13 23:47:21,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:21,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 23:47:21,435 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 23:47:21,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:21,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:22,368 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863432591] [2025-04-13 23:47:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863432591] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:22,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 23:47:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800854080] [2025-04-13 23:47:22,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:22,370 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:47:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:22,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:47:22,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:47:22,370 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:22,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:22,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:22,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:22,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:22,678 INFO L116 PetriNetUnfolderBase]: 195/323 cut-off events. [2025-04-13 23:47:22,678 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 23:47:22,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 323 events. 195/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 964 event pairs, 85 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 669. Up to 178 conditions per place. [2025-04-13 23:47:22,679 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2025-04-13 23:47:22,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 135 flow [2025-04-13 23:47:22,680 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:47:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:47:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2025-04-13 23:47:22,682 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2025-04-13 23:47:22,683 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 44 flow. Second operand 3 states and 40 transitions. [2025-04-13 23:47:22,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 135 flow [2025-04-13 23:47:22,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 23:47:22,684 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2025-04-13 23:47:22,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2025-04-13 23:47:22,685 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 23:47:22,685 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2025-04-13 23:47:22,685 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:22,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:22,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:22,685 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 23:47:22,686 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:22,687 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1325705552, now seen corresponding path program 1 times [2025-04-13 23:47:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:22,687 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956004449] [2025-04-13 23:47:22,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:22,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:47:22,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:47:22,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:22,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:47:23,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:23,158 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956004449] [2025-04-13 23:47:23,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956004449] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:23,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:23,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:47:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476819979] [2025-04-13 23:47:23,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:23,159 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:47:23,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:23,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:47:23,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:47:23,159 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:23,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:23,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:23,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:23,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:23,933 INFO L116 PetriNetUnfolderBase]: 121/225 cut-off events. [2025-04-13 23:47:23,933 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 23:47:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 225 events. 121/225 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 721 event pairs, 33 based on Foata normal form. 14/239 useless extension candidates. Maximal degree in co-relation 502. Up to 151 conditions per place. [2025-04-13 23:47:23,934 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2025-04-13 23:47:23,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 127 flow [2025-04-13 23:47:23,935 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:47:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:47:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 23:47:23,935 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2025-04-13 23:47:23,935 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 3 states and 34 transitions. [2025-04-13 23:47:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 127 flow [2025-04-13 23:47:23,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:23,936 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 60 flow [2025-04-13 23:47:23,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-04-13 23:47:23,937 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2025-04-13 23:47:23,937 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 60 flow [2025-04-13 23:47:23,937 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:23,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:23,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:23,937 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 23:47:23,937 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:23,938 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash 815333809, now seen corresponding path program 1 times [2025-04-13 23:47:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:23,938 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415164008] [2025-04-13 23:47:23,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:23,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:47:24,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:47:24,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:24,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:24,186 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415164008] [2025-04-13 23:47:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415164008] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:24,186 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585537444] [2025-04-13 23:47:24,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:24,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:24,188 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) [2025-04-13 23:47:24,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 23:47:24,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:47:24,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:47:24,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:24,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:24,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 3420 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:47:24,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:24,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585537444] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:24,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:47:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859856931] [2025-04-13 23:47:24,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:24,706 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:47:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:24,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:47:24,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:47:24,707 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:24,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:24,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:24,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:24,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:26,090 INFO L116 PetriNetUnfolderBase]: 105/197 cut-off events. [2025-04-13 23:47:26,090 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 23:47:26,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 197 events. 105/197 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 493 event pairs, 61 based on Foata normal form. 24/221 useless extension candidates. Maximal degree in co-relation 479. Up to 150 conditions per place. [2025-04-13 23:47:26,091 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 34 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2025-04-13 23:47:26,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 190 flow [2025-04-13 23:47:26,092 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:47:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:47:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 55 transitions. [2025-04-13 23:47:26,094 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3160919540229885 [2025-04-13 23:47:26,095 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 60 flow. Second operand 6 states and 55 transitions. [2025-04-13 23:47:26,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 190 flow [2025-04-13 23:47:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:26,096 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 97 flow [2025-04-13 23:47:26,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2025-04-13 23:47:26,096 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-04-13 23:47:26,096 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 97 flow [2025-04-13 23:47:26,096 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:26,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:26,096 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:26,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 23:47:26,297 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:26,297 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:26,298 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1579248028, now seen corresponding path program 2 times [2025-04-13 23:47:26,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:26,298 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172546740] [2025-04-13 23:47:26,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:26,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:26,349 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 23:47:26,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 23:47:26,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:26,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:26,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172546740] [2025-04-13 23:47:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172546740] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:26,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210178907] [2025-04-13 23:47:26,909 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:26,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:26,912 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) [2025-04-13 23:47:26,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 23:47:27,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 23:47:28,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 23:47:28,478 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:28,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:28,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 3492 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:47:28,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:28,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210178907] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:28,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:28,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:47:28,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993298990] [2025-04-13 23:47:28,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:28,577 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:47:28,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:28,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:47:28,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:47:28,577 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:28,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 97 flow. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:28,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:28,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:29,664 INFO L116 PetriNetUnfolderBase]: 141/269 cut-off events. [2025-04-13 23:47:29,665 INFO L117 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2025-04-13 23:47:29,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 269 events. 141/269 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 691 event pairs, 61 based on Foata normal form. 36/305 useless extension candidates. Maximal degree in co-relation 776. Up to 150 conditions per place. [2025-04-13 23:47:29,666 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 58 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-04-13 23:47:29,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 371 flow [2025-04-13 23:47:29,667 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:47:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:47:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2025-04-13 23:47:29,669 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28448275862068967 [2025-04-13 23:47:29,669 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 97 flow. Second operand 12 states and 99 transitions. [2025-04-13 23:47:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 371 flow [2025-04-13 23:47:29,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 69 transitions, 355 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:29,671 INFO L231 Difference]: Finished difference. Result has 49 places, 29 transitions, 165 flow [2025-04-13 23:47:29,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=165, PETRI_PLACES=49, PETRI_TRANSITIONS=29} [2025-04-13 23:47:29,672 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-04-13 23:47:29,672 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 29 transitions, 165 flow [2025-04-13 23:47:29,674 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:29,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:29,674 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:29,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 23:47:29,878 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:29,878 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:29,878 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1909868548, now seen corresponding path program 3 times [2025-04-13 23:47:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:29,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888110454] [2025-04-13 23:47:29,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:47:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:29,940 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 23:47:32,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:47:32,257 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:47:32,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:32,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:32,676 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888110454] [2025-04-13 23:47:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888110454] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:32,676 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401501072] [2025-04-13 23:47:32,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:47:32,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:32,679 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) [2025-04-13 23:47:32,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 23:47:32,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 23:47:59,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:47:59,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:47:59,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:59,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:47:59,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:59,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401501072] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:59,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:59,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 23:47:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011598856] [2025-04-13 23:47:59,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:59,549 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 23:47:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:59,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 23:47:59,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 23:47:59,550 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:59,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 29 transitions, 165 flow. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:47:59,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:59,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:00,910 INFO L116 PetriNetUnfolderBase]: 213/413 cut-off events. [2025-04-13 23:48:00,910 INFO L117 PetriNetUnfolderBase]: For 3517/3517 co-relation queries the response was YES. [2025-04-13 23:48:00,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 413 events. 213/413 cut-off events. For 3517/3517 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1087 event pairs, 61 based on Foata normal form. 72/485 useless extension candidates. Maximal degree in co-relation 1405. Up to 150 conditions per place. [2025-04-13 23:48:00,914 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 106 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2025-04-13 23:48:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 739 flow [2025-04-13 23:48:00,915 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 23:48:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 23:48:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2025-04-13 23:48:00,918 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27155172413793105 [2025-04-13 23:48:00,918 INFO L175 Difference]: Start difference. First operand has 49 places, 29 transitions, 165 flow. Second operand 24 states and 189 transitions. [2025-04-13 23:48:00,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 739 flow [2025-04-13 23:48:00,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 129 transitions, 667 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-04-13 23:48:00,925 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 285 flow [2025-04-13 23:48:00,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=285, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2025-04-13 23:48:00,929 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2025-04-13 23:48:00,929 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 285 flow [2025-04-13 23:48:00,929 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:00,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:00,929 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:00,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 23:48:01,130 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:01,130 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:48:01,130 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1438350524, now seen corresponding path program 4 times [2025-04-13 23:48:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:01,131 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244174004] [2025-04-13 23:48:01,131 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:01,193 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 23:48:01,234 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:48:01,235 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:01,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:02,240 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244174004] [2025-04-13 23:48:02,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244174004] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:02,240 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713439613] [2025-04-13 23:48:02,240 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:02,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:02,243 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) [2025-04-13 23:48:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 23:48:02,424 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 23:48:02,768 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:48:02,768 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:02,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:02,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 3924 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-13 23:48:02,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:02,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713439613] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:03,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-04-13 23:48:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604167704] [2025-04-13 23:48:03,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:03,547 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 23:48:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:03,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 23:48:03,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 23:48:03,549 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:48:03,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 285 flow. Second operand has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:03,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:03,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:48:03,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:05,571 INFO L116 PetriNetUnfolderBase]: 357/701 cut-off events. [2025-04-13 23:48:05,572 INFO L117 PetriNetUnfolderBase]: For 34585/34585 co-relation queries the response was YES. [2025-04-13 23:48:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 701 events. 357/701 cut-off events. For 34585/34585 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1879 event pairs, 61 based on Foata normal form. 144/845 useless extension candidates. Maximal degree in co-relation 2533. Up to 239 conditions per place. [2025-04-13 23:48:05,578 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 202 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2025-04-13 23:48:05,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 1435 flow [2025-04-13 23:48:05,579 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-13 23:48:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-13 23:48:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 369 transitions. [2025-04-13 23:48:05,582 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2650862068965517 [2025-04-13 23:48:05,582 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 285 flow. Second operand 48 states and 369 transitions. [2025-04-13 23:48:05,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 1435 flow [2025-04-13 23:48:05,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 249 transitions, 1291 flow, removed 61 selfloop flow, removed 11 redundant places. [2025-04-13 23:48:05,592 INFO L231 Difference]: Finished difference. Result has 139 places, 65 transitions, 525 flow [2025-04-13 23:48:05,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=525, PETRI_PLACES=139, PETRI_TRANSITIONS=65} [2025-04-13 23:48:05,593 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2025-04-13 23:48:05,593 INFO L485 AbstractCegarLoop]: Abstraction has has 139 places, 65 transitions, 525 flow [2025-04-13 23:48:05,593 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:05,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:05,593 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:05,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 23:48:05,793 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:05,794 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:48:05,794 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash 46900796, now seen corresponding path program 5 times [2025-04-13 23:48:05,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:05,795 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254144374] [2025-04-13 23:48:05,795 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:05,993 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. [2025-04-13 23:48:09,244 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 59 of 59 statements. [2025-04-13 23:48:09,245 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-13 23:48:09,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:11,671 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254144374] [2025-04-13 23:48:11,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254144374] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:11,671 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121842185] [2025-04-13 23:48:11,671 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:11,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:11,673 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) [2025-04-13 23:48:11,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 23:48:11,940 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes.