/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_longest.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:12:56,845 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:12:56,888 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 19:12:56,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:12:56,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:12:56,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:12:56,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:12:56,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:12:56,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:12:56,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:12:56,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:12:56,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:12:56,908 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:12:56,909 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:12:56,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:12:56,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:12:56,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:12:56,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:12:56,910 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 19:12:57,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:12:57,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:12:57,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:12:57,137 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:12:57,139 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:12:57,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longest.i [2025-04-13 19:12:58,343 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3939f86/6d92e692c4674e239a0653ea54a8775b/FLAGe82d4a030 [2025-04-13 19:12:58,614 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:12:58,614 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i [2025-04-13 19:12:58,630 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3939f86/6d92e692c4674e239a0653ea54a8775b/FLAGe82d4a030 [2025-04-13 19:12:59,393 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3939f86/6d92e692c4674e239a0653ea54a8775b [2025-04-13 19:12:59,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:12:59,396 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:12:59,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:12:59,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:12:59,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:12:59,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7254ba0c 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 19:12:59,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:12:59" (1/1) ... [2025-04-13 19:12:59,426 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:12:59,768 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2025-04-13 19:12:59,773 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2025-04-13 19:12:59,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:12:59,827 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:12:59,892 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2025-04-13 19:12:59,894 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2025-04-13 19:12:59,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:12:59,974 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:12:59,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:12:59 WrapperNode [2025-04-13 19:12:59,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:12:59,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:12:59,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:12:59,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:12:59,979 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 19:13:00,007 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 19:13:00,119 INFO L138 Inliner]: procedures = 274, calls = 1652, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 1791 [2025-04-13 19:13:00,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:13:00,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:13:00,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:13:00,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:13:00,126 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 19:13:00,127 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 19:13:00,141 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 19:13:00,181 INFO L175 MemorySlicer]: Split 1635 memory accesses to 4 slices as follows [2, 5, 802, 826]. 51 percent of accesses are in the largest equivalence class. The 1610 initializations are split as follows [2, 5, 800, 803]. The 11 writes are split as follows [0, 0, 1, 10]. [2025-04-13 19:13:00,181 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 19:13:00,181 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 19:13:00,225 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 19:13:00,228 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 19:13:00,234 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 19:13:00,240 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 19:13:00,247 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 19:13:00,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:13:00,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:13:00,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:13:00,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:13:00,266 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 19:13:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:13:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:00,291 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 19:13:00,293 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 19:13:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:13:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:13:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:13:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:13:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:13:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 19:13:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:13:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:13:00,312 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 19:13:00,432 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:13:00,433 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:13:01,910 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:13:01,910 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:13:01,910 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:13:41,324 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:13:41,348 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:13:41,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:13:41 BoogieIcfgContainer [2025-04-13 19:13:41,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:13:41,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:13:41,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:13:41,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:13:41,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:12:59" (1/3) ... [2025-04-13 19:13:41,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d492b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:13:41, skipping insertion in model container [2025-04-13 19:13:41,355 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 19:13:41,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d492b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:13:41, skipping insertion in model container [2025-04-13 19:13:41,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:13:41" (3/3) ... [2025-04-13 19:13:41,356 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2025-04-13 19:13:41,368 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:13:41,369 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longest.i that has 3 procedures, 24 locations, 24 edges, 1 initial locations, 2 loop locations, and 2 error locations. [2025-04-13 19:13:41,369 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:13:41,483 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 19:13:41,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 19:13:41,539 INFO L116 PetriNetUnfolderBase]: 5/27 cut-off events. [2025-04-13 19:13:41,541 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:13:41,542 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 19:13:41,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 19:13:41,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 59 flow [2025-04-13 19:13:41,555 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:13:41,564 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;@70a14455, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:13:41,564 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 19:13:41,565 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:13:41,567 INFO L116 PetriNetUnfolderBase]: 0/0 cut-off events. [2025-04-13 19:13:41,567 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:13:41,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:41,568 INFO L206 CegarLoopForPetriNet]: trace histogram [1] [2025-04-13 19:13:41,569 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 19:13:41,572 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 3734, now seen corresponding path program 1 times [2025-04-13 19:13:41,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:41,578 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442761444] [2025-04-13 19:13:41,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:41,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-13 19:13:41,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-13 19:13:41,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:41,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:41,653 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 19:13:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:41,654 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442761444] [2025-04-13 19:13:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442761444] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:41,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2025-04-13 19:13:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326329948] [2025-04-13 19:13:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:41,663 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:13:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:41,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:13:41,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:13:41,683 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:41,685 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 19:13:41,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:41,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:41,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:42,063 INFO L116 PetriNetUnfolderBase]: 239/374 cut-off events. [2025-04-13 19:13:42,063 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 19:13:42,064 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 19:13:42,074 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 20 selfloop transitions, 0 changer transitions 4/24 dead transitions. [2025-04-13 19:13:42,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 105 flow [2025-04-13 19:13:42,075 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:13:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:13:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 29 transitions. [2025-04-13 19:13:42,085 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:13:42,086 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 59 flow. Second operand 2 states and 29 transitions. [2025-04-13 19:13:42,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 105 flow [2025-04-13 19:13:42,090 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 19:13:42,091 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 44 flow [2025-04-13 19:13:42,092 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 19:13:42,094 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 19:13:42,094 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 44 flow [2025-04-13 19:13:42,094 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 19:13:42,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:42,094 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:42,095 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:13:42,095 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 19:13:42,095 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2039444857, now seen corresponding path program 1 times [2025-04-13 19:13:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:42,095 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586756618] [2025-04-13 19:13:42,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:42,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:13:42,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:13:42,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:42,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:43,116 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 19:13:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:43,116 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586756618] [2025-04-13 19:13:43,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586756618] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:43,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:43,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:13:43,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110726534] [2025-04-13 19:13:43,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:43,117 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:13:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:43,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:13:43,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:13:43,118 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:43,118 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 19:13:43,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:43,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:43,327 INFO L116 PetriNetUnfolderBase]: 195/323 cut-off events. [2025-04-13 19:13:43,328 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:13:43,329 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 19:13:43,330 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2025-04-13 19:13:43,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 135 flow [2025-04-13 19:13:43,331 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:13:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:13:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2025-04-13 19:13:43,332 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2025-04-13 19:13:43,332 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 44 flow. Second operand 3 states and 40 transitions. [2025-04-13 19:13:43,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 135 flow [2025-04-13 19:13:43,332 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 19:13:43,334 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2025-04-13 19:13:43,334 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 19:13:43,334 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 19:13:43,334 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2025-04-13 19:13:43,334 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 19:13:43,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:43,334 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:43,334 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:13:43,335 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 19:13:43,335 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 20860038, now seen corresponding path program 1 times [2025-04-13 19:13:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:43,335 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444646159] [2025-04-13 19:13:43,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:43,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:13:43,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:13:43,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:43,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:43,785 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 19:13:43,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:43,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444646159] [2025-04-13 19:13:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444646159] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:13:43,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:13:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:13:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022505553] [2025-04-13 19:13:43,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:13:43,786 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:13:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:43,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:13:43,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:13:43,787 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:43,787 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 19:13:43,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:43,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:43,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:44,386 INFO L116 PetriNetUnfolderBase]: 121/225 cut-off events. [2025-04-13 19:13:44,386 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 19:13:44,389 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 19:13:44,390 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2025-04-13 19:13:44,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 127 flow [2025-04-13 19:13:44,391 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:13:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:13:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 19:13:44,392 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2025-04-13 19:13:44,392 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 3 states and 34 transitions. [2025-04-13 19:13:44,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 127 flow [2025-04-13 19:13:44,392 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 19:13:44,392 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 60 flow [2025-04-13 19:13:44,393 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 19:13:44,393 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2025-04-13 19:13:44,393 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 60 flow [2025-04-13 19:13:44,393 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 19:13:44,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:44,393 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:44,393 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:13:44,394 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 19:13:44,394 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash 989246791, now seen corresponding path program 1 times [2025-04-13 19:13:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:44,394 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919395668] [2025-04-13 19:13:44,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:44,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:13:44,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:13:44,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:44,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:44,622 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 19:13:44,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:44,622 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919395668] [2025-04-13 19:13:44,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919395668] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:44,622 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083040920] [2025-04-13 19:13:44,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:13:44,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:44,624 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 19:13:44,626 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 19:13:44,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:13:45,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:13:45,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:13:45,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:45,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 3420 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:13:45,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:45,119 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 19:13:45,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:45,132 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 19:13:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083040920] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:45,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:13:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879304861] [2025-04-13 19:13:45,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:45,132 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:13:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:45,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:13:45,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:13:45,133 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:45,133 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 19:13:45,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:45,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:45,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:46,256 INFO L116 PetriNetUnfolderBase]: 105/197 cut-off events. [2025-04-13 19:13:46,257 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 19:13:46,257 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 19:13:46,258 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 34 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2025-04-13 19:13:46,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 190 flow [2025-04-13 19:13:46,259 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:13:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:13:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 55 transitions. [2025-04-13 19:13:46,259 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3160919540229885 [2025-04-13 19:13:46,259 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 60 flow. Second operand 6 states and 55 transitions. [2025-04-13 19:13:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 190 flow [2025-04-13 19:13:46,260 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 19:13:46,260 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 97 flow [2025-04-13 19:13:46,261 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 19:13:46,261 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-04-13 19:13:46,261 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 97 flow [2025-04-13 19:13:46,261 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 19:13:46,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:46,261 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:46,272 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 19:13:46,462 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 19:13:46,462 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 19:13:46,462 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1404584811, now seen corresponding path program 2 times [2025-04-13 19:13:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:46,463 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247495076] [2025-04-13 19:13:46,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:13:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:46,512 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 19:13:46,814 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:13:46,814 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:13:46,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:47,039 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 19:13:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:47,040 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247495076] [2025-04-13 19:13:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247495076] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:47,040 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286325615] [2025-04-13 19:13:47,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:13:47,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:47,043 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 19:13:47,044 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 19:13:47,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 19:13:48,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:13:48,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:13:48,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:48,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 3492 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:13:48,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:13:48,449 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 19:13:48,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:13:48,495 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 19:13:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286325615] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:13:48,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:13:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:13:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952080663] [2025-04-13 19:13:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:13:48,496 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:13:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:13:48,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:13:48,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:13:48,497 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:13:48,497 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 19:13:48,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:13:48,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:13:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:13:49,866 INFO L116 PetriNetUnfolderBase]: 141/269 cut-off events. [2025-04-13 19:13:49,866 INFO L117 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2025-04-13 19:13:49,866 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 19:13:49,867 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 58 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-04-13 19:13:49,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 371 flow [2025-04-13 19:13:49,868 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:13:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:13:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2025-04-13 19:13:49,869 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28448275862068967 [2025-04-13 19:13:49,869 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 97 flow. Second operand 12 states and 99 transitions. [2025-04-13 19:13:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 371 flow [2025-04-13 19:13:49,872 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 19:13:49,873 INFO L231 Difference]: Finished difference. Result has 49 places, 29 transitions, 165 flow [2025-04-13 19:13:49,873 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 19:13:49,873 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-04-13 19:13:49,873 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 29 transitions, 165 flow [2025-04-13 19:13:49,873 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 19:13:49,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:13:49,873 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:13:49,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 19:13:50,074 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 19:13:50,074 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 19:13:50,074 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:13:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1382394411, now seen corresponding path program 3 times [2025-04-13 19:13:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:13:50,075 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936908463] [2025-04-13 19:13:50,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:13:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:13:50,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 19:13:52,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:13:52,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:13:52,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:13:52,778 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 19:13:52,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:13:52,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936908463] [2025-04-13 19:13:52,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936908463] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:13:52,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220145796] [2025-04-13 19:13:52,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:13:52,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:13:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:13:52,780 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 19:13:52,781 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 19:13:52,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 19:14:15,987 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:14:15,987 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:14:15,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:14:16,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 19:14:16,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:14:16,093 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 19:14:16,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:14:16,252 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 19:14:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220145796] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:14:16,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:14:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 19:14:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356636061] [2025-04-13 19:14:16,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:14:16,253 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 19:14:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:14:16,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 19:14:16,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 19:14:16,254 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:14:16,254 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 19:14:16,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:14:16,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:14:16,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:14:17,605 INFO L116 PetriNetUnfolderBase]: 213/413 cut-off events. [2025-04-13 19:14:17,605 INFO L117 PetriNetUnfolderBase]: For 3515/3515 co-relation queries the response was YES. [2025-04-13 19:14:17,607 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 19:14:17,608 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 106 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2025-04-13 19:14:17,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 739 flow [2025-04-13 19:14:17,609 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 19:14:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 19:14:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2025-04-13 19:14:17,611 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27155172413793105 [2025-04-13 19:14:17,611 INFO L175 Difference]: Start difference. First operand has 49 places, 29 transitions, 165 flow. Second operand 24 states and 189 transitions. [2025-04-13 19:14:17,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 739 flow [2025-04-13 19:14:17,616 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 19:14:17,619 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 285 flow [2025-04-13 19:14:17,619 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 19:14:17,620 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2025-04-13 19:14:17,621 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 285 flow [2025-04-13 19:14:17,621 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 19:14:17,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:14:17,621 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:14:17,681 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 19:14:17,821 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 19:14:17,822 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 19:14:17,822 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:14:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1113307221, now seen corresponding path program 4 times [2025-04-13 19:14:17,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:14:17,822 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354370261] [2025-04-13 19:14:17,822 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:14:17,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:14:17,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 19:14:17,921 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 19:14:17,922 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:14:17,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:14:18,835 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 19:14:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:14:18,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354370261] [2025-04-13 19:14:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354370261] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:14:18,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598171864] [2025-04-13 19:14:18,835 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:14:18,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:14:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:14:18,837 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 19:14:18,838 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 19:14:19,011 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 19:14:19,301 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 19:14:19,301 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:14:19,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:14:19,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 3924 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-13 19:14:19,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:14:19,360 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 19:14:19,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:14:19,908 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 19:14:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598171864] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:14:19,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:14:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-04-13 19:14:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41340721] [2025-04-13 19:14:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:14:19,909 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 19:14:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:14:19,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 19:14:19,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 19:14:19,911 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 19:14:19,911 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 19:14:19,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:14:19,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 19:14:19,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:14:21,322 INFO L116 PetriNetUnfolderBase]: 357/701 cut-off events. [2025-04-13 19:14:21,322 INFO L117 PetriNetUnfolderBase]: For 34583/34583 co-relation queries the response was YES. [2025-04-13 19:14:21,325 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 19:14:21,328 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 202 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2025-04-13 19:14:21,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 1435 flow [2025-04-13 19:14:21,329 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-13 19:14:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-13 19:14:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 369 transitions. [2025-04-13 19:14:21,332 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2650862068965517 [2025-04-13 19:14:21,332 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 285 flow. Second operand 48 states and 369 transitions. [2025-04-13 19:14:21,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 1435 flow [2025-04-13 19:14:21,343 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 19:14:21,346 INFO L231 Difference]: Finished difference. Result has 139 places, 65 transitions, 525 flow [2025-04-13 19:14:21,346 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 19:14:21,346 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2025-04-13 19:14:21,346 INFO L485 AbstractCegarLoop]: Abstraction has has 139 places, 65 transitions, 525 flow [2025-04-13 19:14:21,347 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 19:14:21,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:14:21,347 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:14:21,359 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 19:14:21,547 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 19:14:21,547 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 19:14:21,548 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:14:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1593785685, now seen corresponding path program 5 times [2025-04-13 19:14:21,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:14:21,548 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309037229] [2025-04-13 19:14:21,548 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:14:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:14:21,630 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. [2025-04-13 19:14:24,632 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 59 of 59 statements. [2025-04-13 19:14:24,632 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-13 19:14:24,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:14:26,896 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 19:14:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:14:26,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309037229] [2025-04-13 19:14:26,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309037229] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:14:26,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246134365] [2025-04-13 19:14:26,897 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:14:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:14:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:14:26,899 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 19:14:26,899 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 19:14:27,145 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes.