/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.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread/queue_ok_longer.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:12:56,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:12:56,515 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 19:12:56,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:12:56,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:12:56,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:12:56,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:12:56,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:12:56,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:12:56,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:12:56,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:12:56,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:12:56,547 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:12:56,548 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:12:56,549 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:12:56,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:12:56,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:12:56,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:12:56,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:12:56,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:12:56,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:12:56,550 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:12:56,550 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 [2025-04-13 19:12:56,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:12:56,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:12:56,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:12:56,766 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:12:56,766 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:12:56,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longer.i [2025-04-13 19:12:58,068 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ce62b08/e1c13431d5084753b33fbc49dfe28527/FLAG4ed3ba2d6 [2025-04-13 19:12:58,352 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:12:58,354 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i [2025-04-13 19:12:58,371 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ce62b08/e1c13431d5084753b33fbc49dfe28527/FLAG4ed3ba2d6 [2025-04-13 19:12:59,070 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ce62b08/e1c13431d5084753b33fbc49dfe28527 [2025-04-13 19:12:59,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:12:59,073 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:12:59,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:12:59,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:12:59,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:12:59,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,079 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 07:12:59, skipping insertion in model container [2025-04-13 19:12:59,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:12:59,378 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_longer.i[43272,43285] [2025-04-13 19:12:59,384 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_longer.i[43545,43558] [2025-04-13 19:12:59,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:12:59,421 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:12:59,480 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_longer.i[43272,43285] [2025-04-13 19:12:59,481 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_longer.i[43545,43558] [2025-04-13 19:12:59,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:12:59,571 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:12:59,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59 WrapperNode [2025-04-13 19:12:59,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:12:59,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:12:59,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:12:59,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:12:59,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,673 INFO L138 Inliner]: procedures = 274, calls = 852, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 991 [2025-04-13 19:12:59,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:12:59,674 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:12:59,674 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:12:59,674 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:12:59,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,699 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,734 INFO L175 MemorySlicer]: Split 835 memory accesses to 4 slices as follows [2, 5, 402, 426]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 5, 400, 403]. The 11 writes are split as follows [0, 0, 1, 10]. [2025-04-13 19:12:59,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,766 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:12:59,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:12:59,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:12:59,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:12:59,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:12:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:12:59,815 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 19:12:59,818 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 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:12:59,835 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:12:59,835 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 19:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 19:12:59,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:12:59,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:12:59,837 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:12:59,956 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:12:59,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:13:00,872 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:13:00,873 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:13:00,873 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:13:12,651 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:13:12,672 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:13:12,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:13:12 BoogieIcfgContainer [2025-04-13 19:13:12,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:13:12,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:13:12,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:13:12,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:13:12,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:12:59" (1/3) ... [2025-04-13 19:13:12,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0aee50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:13:12, skipping insertion in model container [2025-04-13 19:13:12,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59" (2/3) ... [2025-04-13 19:13:12,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0aee50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:13:12, skipping insertion in model container [2025-04-13 19:13:12,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:13:12" (3/3) ... [2025-04-13 19:13:12,678 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2025-04-13 19:13:12,689 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:13:12,690 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longer.i that has 3 procedures, 24 locations, 24 edges, 1 initial locations, 2 loop locations, and 2 error locations. [2025-04-13 19:13:12,690 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:13:12,790 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 19:13:12,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 19:13:12,897 INFO L116 PetriNetUnfolderBase]: 5/27 cut-off events. [2025-04-13 19:13:12,900 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:13:12,901 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 35 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 19:13:12,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 19:13:12,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 59 flow [2025-04-13 19:13:12,913 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:13:12,921 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;@32e2a61b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:13:12,923 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 19:13:12,925 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:13:12,925 INFO L116 PetriNetUnfolderBase]: 0/0 cut-off events. [2025-04-13 19:13:12,925 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:13:12,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:12,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1] [2025-04-13 19:13:12,926 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 19:13:12,929 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2134, now seen corresponding path program 1 times [2025-04-13 19:13:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:12,935 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027326518] [2025-04-13 19:13:12,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:12,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:12,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-13 19:13:12,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-13 19:13:12,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:12,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:13,018 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 19:13:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:13,019 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027326518] [2025-04-13 19:13:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027326518] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:13,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:13,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2025-04-13 19:13:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751365112] [2025-04-13 19:13:13,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:13,026 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:13:13,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:13,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:13:13,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:13:13,046 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:13,048 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 19:13:13,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:13,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:13,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:13,330 INFO L116 PetriNetUnfolderBase]: 239/374 cut-off events. [2025-04-13 19:13:13,330 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 19:13:13,331 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 1115 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 19:13:13,334 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 20 selfloop transitions, 0 changer transitions 4/24 dead transitions. [2025-04-13 19:13:13,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 105 flow [2025-04-13 19:13:13,335 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:13:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:13:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 29 transitions. [2025-04-13 19:13:13,345 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:13:13,346 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 59 flow. Second operand 2 states and 29 transitions. [2025-04-13 19:13:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 105 flow [2025-04-13 19:13:13,350 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 19:13:13,351 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 44 flow [2025-04-13 19:13:13,353 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 19:13:13,356 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 19:13:13,356 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 44 flow [2025-04-13 19:13:13,356 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 19:13:13,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:13,356 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:13,357 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:13:13,357 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 19:13:13,357 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -500048825, now seen corresponding path program 1 times [2025-04-13 19:13:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:13,357 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091520187] [2025-04-13 19:13:13,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:13,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:13:13,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:13:13,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:13,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:14,098 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 19:13:14,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:14,099 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091520187] [2025-04-13 19:13:14,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091520187] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:14,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:14,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:13:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997208100] [2025-04-13 19:13:14,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:14,101 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:13:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:14,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:13:14,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:13:14,101 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:14,101 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 19:13:14,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:14,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:14,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:14,295 INFO L116 PetriNetUnfolderBase]: 195/323 cut-off events. [2025-04-13 19:13:14,295 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:13:14,296 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 969 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 19:13:14,297 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2025-04-13 19:13:14,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 135 flow [2025-04-13 19:13:14,299 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:13:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:13:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2025-04-13 19:13:14,300 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2025-04-13 19:13:14,300 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 44 flow. Second operand 3 states and 40 transitions. [2025-04-13 19:13:14,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 135 flow [2025-04-13 19:13:14,300 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 19:13:14,301 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2025-04-13 19:13:14,301 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 19:13:14,302 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 19:13:14,302 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2025-04-13 19:13:14,302 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 19:13:14,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:14,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:14,302 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:13:14,303 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 19:13:14,304 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -79192954, now seen corresponding path program 1 times [2025-04-13 19:13:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:14,304 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846336623] [2025-04-13 19:13:14,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:14,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:14,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:13:14,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:13:14,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:14,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:14,650 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 19:13:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:14,650 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846336623] [2025-04-13 19:13:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846336623] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:14,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:14,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:13:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943276098] [2025-04-13 19:13:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:14,651 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:13:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:14,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:13:14,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:13:14,651 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:14,651 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 19:13:14,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:14,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:14,874 INFO L116 PetriNetUnfolderBase]: 121/225 cut-off events. [2025-04-13 19:13:14,874 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 19:13:14,876 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 708 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 19:13:14,877 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2025-04-13 19:13:14,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 127 flow [2025-04-13 19:13:14,878 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:13:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:13:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 19:13:14,879 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2025-04-13 19:13:14,879 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 3 states and 34 transitions. [2025-04-13 19:13:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 127 flow [2025-04-13 19:13:14,879 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 19:13:14,880 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 60 flow [2025-04-13 19:13:14,880 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 19:13:14,880 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2025-04-13 19:13:14,881 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 60 flow [2025-04-13 19:13:14,881 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 19:13:14,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:14,881 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:14,881 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:13:14,881 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 19:13:14,881 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -672449209, now seen corresponding path program 1 times [2025-04-13 19:13:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:14,881 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725712294] [2025-04-13 19:13:14,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:14,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:13:14,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:13:14,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:14,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:15,069 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 19:13:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:15,070 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725712294] [2025-04-13 19:13:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725712294] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:15,070 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061275444] [2025-04-13 19:13:15,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:15,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:15,074 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 19:13:15,075 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 19:13:15,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:13:15,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:13:15,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:15,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:15,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:13:15,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:15,412 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 19:13:15,412 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:15,427 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 19:13:15,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061275444] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:15,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:15,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:13:15,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345773500] [2025-04-13 19:13:15,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:15,428 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:13:15,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:15,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:13:15,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:13:15,428 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:15,429 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 19:13:15,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:15,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:15,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:15,796 INFO L116 PetriNetUnfolderBase]: 105/197 cut-off events. [2025-04-13 19:13:15,796 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 19:13:15,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 197 events. 105/197 cut-off events. For 14/14 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 19:13:15,797 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 34 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2025-04-13 19:13:15,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 190 flow [2025-04-13 19:13:15,798 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:13:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:13:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 55 transitions. [2025-04-13 19:13:15,799 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3160919540229885 [2025-04-13 19:13:15,799 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 60 flow. Second operand 6 states and 55 transitions. [2025-04-13 19:13:15,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 190 flow [2025-04-13 19:13:15,799 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 19:13:15,800 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 97 flow [2025-04-13 19:13:15,800 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 19:13:15,800 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-04-13 19:13:15,801 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 97 flow [2025-04-13 19:13:15,801 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 19:13:15,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:15,801 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:15,809 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 19:13:16,001 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 19:13:16,001 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 19:13:16,002 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1198655915, now seen corresponding path program 2 times [2025-04-13 19:13:16,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:16,002 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124105961] [2025-04-13 19:13:16,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:13:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:16,040 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 19:13:16,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:13:16,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:13:16,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:16,433 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 19:13:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:16,434 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124105961] [2025-04-13 19:13:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124105961] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:16,434 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799933694] [2025-04-13 19:13:16,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:13:16,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:16,437 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 19:13:16,438 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 19:13:16,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 19:13:16,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:13:16,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:13:16,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:16,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:13:16,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:16,970 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 19:13:16,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:17,016 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 19:13:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799933694] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:17,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:17,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:13:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805524766] [2025-04-13 19:13:17,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:17,018 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:13:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:17,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:13:17,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:13:17,018 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:17,019 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 19:13:17,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:17,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:17,504 INFO L116 PetriNetUnfolderBase]: 141/269 cut-off events. [2025-04-13 19:13:17,505 INFO L117 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2025-04-13 19:13:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 269 events. 141/269 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 692 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 19:13:17,506 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 58 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-04-13 19:13:17,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 371 flow [2025-04-13 19:13:17,507 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:13:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:13:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2025-04-13 19:13:17,508 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28448275862068967 [2025-04-13 19:13:17,508 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 97 flow. Second operand 12 states and 99 transitions. [2025-04-13 19:13:17,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 371 flow [2025-04-13 19:13:17,510 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 19:13:17,511 INFO L231 Difference]: Finished difference. Result has 49 places, 29 transitions, 165 flow [2025-04-13 19:13:17,511 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 19:13:17,512 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-04-13 19:13:17,512 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 29 transitions, 165 flow [2025-04-13 19:13:17,512 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 19:13:17,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:17,512 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:17,523 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 19:13:17,712 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 19:13:17,713 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 19:13:17,713 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash -672012395, now seen corresponding path program 3 times [2025-04-13 19:13:17,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:17,713 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094182529] [2025-04-13 19:13:17,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:13:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:17,752 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 19:13:19,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:13:19,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:13:19,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:19,649 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 19:13:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:19,649 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094182529] [2025-04-13 19:13:19,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094182529] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:19,649 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675499519] [2025-04-13 19:13:19,649 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:13:19,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:19,651 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 19:13:19,653 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 19:13:19,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 19:13:30,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:13:30,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:13:30,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:30,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 19:13:30,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:30,365 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 19:13:30,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:30,525 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 19:13:30,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675499519] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:30,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 19:13:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670000135] [2025-04-13 19:13:30,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:30,526 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 19:13:30,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:30,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 19:13:30,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 19:13:30,527 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:30,528 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 19:13:30,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:30,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:31,115 INFO L116 PetriNetUnfolderBase]: 213/413 cut-off events. [2025-04-13 19:13:31,115 INFO L117 PetriNetUnfolderBase]: For 3515/3515 co-relation queries the response was YES. [2025-04-13 19:13:31,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 413 events. 213/413 cut-off events. For 3515/3515 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1088 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 19:13:31,118 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 106 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2025-04-13 19:13:31,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 739 flow [2025-04-13 19:13:31,119 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 19:13:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 19:13:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2025-04-13 19:13:31,121 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27155172413793105 [2025-04-13 19:13:31,121 INFO L175 Difference]: Start difference. First operand has 49 places, 29 transitions, 165 flow. Second operand 24 states and 189 transitions. [2025-04-13 19:13:31,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 739 flow [2025-04-13 19:13:31,128 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 19:13:31,129 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 285 flow [2025-04-13 19:13:31,129 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 19:13:31,129 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2025-04-13 19:13:31,130 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 285 flow [2025-04-13 19:13:31,130 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 19:13:31,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:31,130 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:31,160 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 19:13:31,330 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 19:13:31,330 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 19:13:31,331 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1255146987, now seen corresponding path program 4 times [2025-04-13 19:13:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:31,331 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099629241] [2025-04-13 19:13:31,331 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:13:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:31,392 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 19:13:31,434 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 19:13:31,435 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:13:31,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:32,305 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 19:13:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:32,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099629241] [2025-04-13 19:13:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099629241] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:32,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113254299] [2025-04-13 19:13:32,305 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:13:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:32,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:32,308 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 19:13:32,310 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 19:13:32,463 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 19:13:32,648 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 19:13:32,648 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:13:32,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:32,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-13 19:13:32,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:32,737 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 19:13:32,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:33,254 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 19:13:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113254299] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:33,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-04-13 19:13:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675934886] [2025-04-13 19:13:33,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:33,254 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 19:13:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:33,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 19:13:33,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 19:13:33,256 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:33,256 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 19:13:33,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:33,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:34,212 INFO L116 PetriNetUnfolderBase]: 357/701 cut-off events. [2025-04-13 19:13:34,213 INFO L117 PetriNetUnfolderBase]: For 34583/34583 co-relation queries the response was YES. [2025-04-13 19:13:34,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 701 events. 357/701 cut-off events. For 34583/34583 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1880 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 19:13:34,220 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 202 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2025-04-13 19:13:34,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 1435 flow [2025-04-13 19:13:34,221 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-13 19:13:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-13 19:13:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 369 transitions. [2025-04-13 19:13:34,223 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2650862068965517 [2025-04-13 19:13:34,223 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 285 flow. Second operand 48 states and 369 transitions. [2025-04-13 19:13:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 1435 flow [2025-04-13 19:13:34,234 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 19:13:34,236 INFO L231 Difference]: Finished difference. Result has 139 places, 65 transitions, 525 flow [2025-04-13 19:13:34,236 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 19:13:34,237 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2025-04-13 19:13:34,237 INFO L485 AbstractCegarLoop]: Abstraction has has 139 places, 65 transitions, 525 flow [2025-04-13 19:13:34,237 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 19:13:34,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:34,237 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:34,247 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 19:13:34,442 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 19:13:34,442 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 19:13:34,442 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash 506781461, now seen corresponding path program 5 times [2025-04-13 19:13:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:34,443 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684462962] [2025-04-13 19:13:34,443 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:13:34,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:34,516 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. [2025-04-13 19:13:37,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 59 of 59 statements. [2025-04-13 19:13:37,559 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-13 19:13:37,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:39,585 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 19:13:39,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:39,585 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684462962] [2025-04-13 19:13:39,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684462962] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:39,585 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559341259] [2025-04-13 19:13:39,585 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:13:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:39,587 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 19:13:39,588 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 19:13:39,830 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. Received shutdown request... [2025-04-13 19:27:32,812 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 19:27:32,812 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 19:27:33,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2025-04-13 19:27:34,013 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2025-04-13 19:27:34,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2025-04-13 19:27:34,088 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 19:27:34,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-04-13 19:27:34,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2025-04-13 19:27:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514139318] [2025-04-13 19:27:34,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-04-13 19:27:34,089 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 19:27:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:27:34,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 19:27:34,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 19:27:34,091 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:27:34,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 65 transitions, 525 flow. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 19:27:34,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:27:34,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:27:34,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:27:34,093 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2025-04-13 19:27:34,093 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 19:27:34,093 WARN L610 AbstractCegarLoop]: Verification canceled: while executing Executor. [2025-04-13 19:27:34,094 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-13 19:27:34,094 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2025-04-13 19:27:34,094 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2025-04-13 19:27:34,094 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 19:27:34,094 INFO L422 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2025-04-13 19:27:34,098 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:27:34,098 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:27:34,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:27:34 BasicIcfg [2025-04-13 19:27:34,101 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:27:34,101 INFO L158 Benchmark]: Toolchain (without parser) took 875028.41ms. Allocated memory was 155.2MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 106.2MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2025-04-13 19:27:34,102 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 163.6MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:27:34,102 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.05ms. Allocated memory is still 155.2MB. Free memory was 106.2MB in the beginning and 64.7MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2025-04-13 19:27:34,102 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.42ms. Allocated memory is still 155.2MB. Free memory was 64.7MB in the beginning and 55.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-13 19:27:34,103 INFO L158 Benchmark]: Boogie Preprocessor took 107.21ms. Allocated memory is still 155.2MB. Free memory was 55.7MB in the beginning and 47.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-13 19:27:34,103 INFO L158 Benchmark]: RCFGBuilder took 12890.32ms. Allocated memory was 155.2MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 47.3MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2025-04-13 19:27:34,103 INFO L158 Benchmark]: TraceAbstraction took 861427.28ms. Allocated memory was 3.6GB in the beginning and 5.1GB in the end (delta: 1.4GB). Free memory was 2.9GB in the beginning and 3.6GB in the end (delta: -694.2MB). Peak memory consumption was 742.4MB. Max. memory is 8.0GB. [2025-04-13 19:27:34,104 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 163.6MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 499.05ms. Allocated memory is still 155.2MB. Free memory was 106.2MB in the beginning and 64.7MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 100.42ms. Allocated memory is still 155.2MB. Free memory was 64.7MB in the beginning and 55.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 107.21ms. Allocated memory is still 155.2MB. Free memory was 55.7MB in the beginning and 47.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * RCFGBuilder took 12890.32ms. Allocated memory was 155.2MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 47.3MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. * TraceAbstraction took 861427.28ms. Allocated memory was 3.6GB in the beginning and 5.1GB in the end (delta: 1.4GB). Free memory was 2.9GB in the beginning and 3.6GB in the end (delta: -694.2MB). Peak memory consumption was 742.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1033]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1049]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1052]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1053]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 51 edges, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 861.3s, OverallIterations: 8, TraceHistogramMax: 46, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1081 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1081 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 833 IncrementalHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 833 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=525occurred in iteration=7, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 16.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 257 NumberOfCodeBlocks, 257 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 330 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 2 NumberOfNonLiveVariables, 8072 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1/2039 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown