/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/goblint-regression/28-race_reach_82-list_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:43:56,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:43:56,571 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 19:43:56,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:43:56,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:43:56,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:43:56,589 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:43:56,589 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:43:56,589 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:43:56,589 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:43:56,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:43:56,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:43:56,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:43:56,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:43:56,590 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:43:56,591 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:43:56,591 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:43:56,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:43:56,591 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:43:56,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:43:56,593 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 19:43:56,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:43:56,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:43:56,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:43:56,816 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:43:56,817 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:43:56,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2025-04-13 19:43:58,098 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7ea975d/61bc2839c37f48de9de8991d3b07d566/FLAG176b0f861 [2025-04-13 19:43:58,361 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:43:58,362 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2025-04-13 19:43:58,378 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7ea975d/61bc2839c37f48de9de8991d3b07d566/FLAG176b0f861 [2025-04-13 19:43:59,300 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7ea975d/61bc2839c37f48de9de8991d3b07d566 [2025-04-13 19:43:59,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:43:59,303 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:43:59,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:43:59,304 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:43:59,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:43:59,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b09cded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59, skipping insertion in model container [2025-04-13 19:43:59,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,331 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:43:59,603 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2025-04-13 19:43:59,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:43:59,650 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:43:59,706 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2025-04-13 19:43:59,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:43:59,769 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:43:59,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59 WrapperNode [2025-04-13 19:43:59,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:43:59,772 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:43:59,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:43:59,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:43:59,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,820 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 204 [2025-04-13 19:43:59,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:43:59,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:43:59,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:43:59,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:43:59,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,830 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,843 INFO L175 MemorySlicer]: Split 35 memory accesses to 7 slices as follows [2, 5, 5, 5, 2, 2, 14]. 40 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0, 0, 0]. The 10 writes are split as follows [0, 0, 0, 0, 1, 1, 8]. [2025-04-13 19:43:59,843 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,843 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,850 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:43:59,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:43:59,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:43:59,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:43:59,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (1/1) ... [2025-04-13 19:43:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:43:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:43:59,888 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 19:43:59,890 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 19:43:59,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-13 19:43:59,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-13 19:43:59,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-04-13 19:43:59,908 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-04-13 19:43:59,908 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-04-13 19:43:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:43:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-04-13 19:43:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:43:59,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:43:59,911 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 19:44:00,048 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:44:00,049 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:44:00,308 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:44:00,309 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:44:00,309 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:44:00,566 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,566 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,571 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,580 WARN L179 LargeBlockEncoding]: Complex 3:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,583 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,585 WARN L179 LargeBlockEncoding]: Complex 4:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,590 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:44:00,593 INFO L313 CfgBuilder]: Removed 6 assume(true) statements. [2025-04-13 19:44:00,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:44:00 BoogieIcfgContainer [2025-04-13 19:44:00,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:44:00,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:44:00,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:44:00,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:44:00,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:43:59" (1/3) ... [2025-04-13 19:44:00,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a3c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:44:00, skipping insertion in model container [2025-04-13 19:44:00,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:43:59" (2/3) ... [2025-04-13 19:44:00,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a3c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:44:00, skipping insertion in model container [2025-04-13 19:44:00,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:44:00" (3/3) ... [2025-04-13 19:44:00,602 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2025-04-13 19:44:00,614 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:44:00,616 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_82-list_racefree.i that has 3 procedures, 41 locations, 68 edges, 1 initial locations, 10 loop locations, and 1 error locations. [2025-04-13 19:44:00,616 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:44:00,669 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-13 19:44:00,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 72 transitions, 164 flow [2025-04-13 19:44:00,738 INFO L116 PetriNetUnfolderBase]: 49/132 cut-off events. [2025-04-13 19:44:00,739 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-13 19:44:00,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 132 events. 49/132 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 406 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 67. Up to 14 conditions per place. [2025-04-13 19:44:00,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 72 transitions, 164 flow [2025-04-13 19:44:00,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 64 transitions, 142 flow [2025-04-13 19:44:00,754 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:00,765 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:00,765 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 19:44:00,770 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:00,770 INFO L116 PetriNetUnfolderBase]: 0/13 cut-off events. [2025-04-13 19:44:00,770 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:44:00,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:00,773 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-13 19:44:00,773 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 19:44:00,777 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 19875635, now seen corresponding path program 1 times [2025-04-13 19:44:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:00,784 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598348942] [2025-04-13 19:44:00,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:00,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:44:00,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:44:00,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:00,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:00,939 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:44:00,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:44:00,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:44:00,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:00,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:01,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:44:01,011 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:44:01,013 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-04-13 19:44:01,015 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-04-13 19:44:01,015 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 19:44:01,015 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-13 19:44:01,015 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:44:01,016 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:44:01,020 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:44:01,020 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 19:44:01,077 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2025-04-13 19:44:01,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 123 transitions, 290 flow [2025-04-13 19:44:01,145 INFO L116 PetriNetUnfolderBase]: 184/440 cut-off events. [2025-04-13 19:44:01,145 INFO L117 PetriNetUnfolderBase]: For 72/94 co-relation queries the response was YES. [2025-04-13 19:44:01,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 440 events. 184/440 cut-off events. For 72/94 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2077 event pairs, 2 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 295. Up to 39 conditions per place. [2025-04-13 19:44:01,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 123 transitions, 290 flow [2025-04-13 19:44:01,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 117 transitions, 278 flow [2025-04-13 19:44:01,157 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:01,157 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:01,157 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 19:44:01,168 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:01,168 INFO L116 PetriNetUnfolderBase]: 1/35 cut-off events. [2025-04-13 19:44:01,168 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 19:44:01,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:01,169 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-04-13 19:44:01,169 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 19:44:01,169 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1246869080, now seen corresponding path program 1 times [2025-04-13 19:44:01,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:01,169 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959754621] [2025-04-13 19:44:01,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:01,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:01,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:44:01,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:44:01,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:01,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:01,217 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:44:01,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:44:01,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:44:01,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:01,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:01,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:44:01,266 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:44:01,266 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-04-13 19:44:01,266 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-13 19:44:01,266 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2025-04-13 19:44:01,266 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-04-13 19:44:01,266 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 19:44:01,266 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:44:01,266 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:44:01,267 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:44:01,267 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 19:44:01,341 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2025-04-13 19:44:01,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 174 transitions, 420 flow [2025-04-13 19:44:01,498 INFO L116 PetriNetUnfolderBase]: 621/1282 cut-off events. [2025-04-13 19:44:01,498 INFO L117 PetriNetUnfolderBase]: For 419/549 co-relation queries the response was YES. [2025-04-13 19:44:01,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 1282 events. 621/1282 cut-off events. For 419/549 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7160 event pairs, 32 based on Foata normal form. 0/763 useless extension candidates. Maximal degree in co-relation 945. Up to 192 conditions per place. [2025-04-13 19:44:01,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 174 transitions, 420 flow [2025-04-13 19:44:01,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 168 transitions, 408 flow [2025-04-13 19:44:01,539 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:01,539 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:01,539 INFO L341 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-04-13 19:44:01,547 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:01,547 INFO L116 PetriNetUnfolderBase]: 3/68 cut-off events. [2025-04-13 19:44:01,547 INFO L117 PetriNetUnfolderBase]: For 25/29 co-relation queries the response was YES. [2025-04-13 19:44:01,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:01,547 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2025-04-13 19:44:01,548 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-04-13 19:44:01,548 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash -789238184, now seen corresponding path program 1 times [2025-04-13 19:44:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:01,548 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664344472] [2025-04-13 19:44:01,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:01,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:01,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:44:01,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:44:01,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:01,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:01,583 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:44:01,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:44:01,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:44:01,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:01,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:01,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:44:01,633 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:44:01,633 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-04-13 19:44:01,633 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-04-13 19:44:01,633 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2025-04-13 19:44:01,634 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-04-13 19:44:01,634 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-04-13 19:44:01,634 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-04-13 19:44:01,634 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:44:01,634 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:44:01,634 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:44:01,634 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-13 19:44:01,730 INFO L143 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2025-04-13 19:44:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 225 transitions, 554 flow [2025-04-13 19:44:02,312 INFO L116 PetriNetUnfolderBase]: 2440/4278 cut-off events. [2025-04-13 19:44:02,312 INFO L117 PetriNetUnfolderBase]: For 2144/2538 co-relation queries the response was YES. [2025-04-13 19:44:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6419 conditions, 4278 events. 2440/4278 cut-off events. For 2144/2538 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25740 event pairs, 313 based on Foata normal form. 0/2921 useless extension candidates. Maximal degree in co-relation 3258. Up to 1024 conditions per place. [2025-04-13 19:44:02,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 225 transitions, 554 flow [2025-04-13 19:44:02,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 219 transitions, 542 flow [2025-04-13 19:44:02,452 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:02,454 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:02,454 INFO L341 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-04-13 19:44:02,498 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:02,499 INFO L116 PetriNetUnfolderBase]: 6/116 cut-off events. [2025-04-13 19:44:02,499 INFO L117 PetriNetUnfolderBase]: For 65/73 co-relation queries the response was YES. [2025-04-13 19:44:02,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:02,499 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2025-04-13 19:44:02,499 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 19:44:02,499 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -706738093, now seen corresponding path program 1 times [2025-04-13 19:44:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:02,500 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735489508] [2025-04-13 19:44:02,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:02,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:44:02,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:44:02,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:02,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:02,558 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:44:02,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:44:02,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:44:02,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:02,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:02,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:44:02,600 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-04-13 19:44:02,600 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-04-13 19:44:02,600 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:44:02,600 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:44:02,603 WARN L247 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:44:02,603 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-04-13 19:44:02,678 INFO L143 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2025-04-13 19:44:02,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 276 transitions, 692 flow [2025-04-13 19:44:04,652 INFO L116 PetriNetUnfolderBase]: 10825/16772 cut-off events. [2025-04-13 19:44:04,653 INFO L117 PetriNetUnfolderBase]: For 10450/11392 co-relation queries the response was YES. [2025-04-13 19:44:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27163 conditions, 16772 events. 10825/16772 cut-off events. For 10450/11392 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 104217 event pairs, 2148 based on Foata normal form. 0/12747 useless extension candidates. Maximal degree in co-relation 13069. Up to 5120 conditions per place. [2025-04-13 19:44:04,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 276 transitions, 692 flow [2025-04-13 19:44:05,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 270 transitions, 680 flow [2025-04-13 19:44:05,174 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:05,174 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:05,175 INFO L341 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-04-13 19:44:05,187 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:05,187 INFO L116 PetriNetUnfolderBase]: 23/199 cut-off events. [2025-04-13 19:44:05,187 INFO L117 PetriNetUnfolderBase]: For 133/145 co-relation queries the response was YES. [2025-04-13 19:44:05,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:05,187 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:44:05,187 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-04-13 19:44:05,187 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash -628794007, now seen corresponding path program 1 times [2025-04-13 19:44:05,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:05,188 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107793486] [2025-04-13 19:44:05,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:05,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:05,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:44:05,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:44:05,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:05,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:05,218 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:44:05,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:44:05,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:44:05,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:05,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:44:05,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:44:05,257 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:44:05,257 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2025-04-13 19:44:05,257 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2025-04-13 19:44:05,257 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2025-04-13 19:44:05,258 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2025-04-13 19:44:05,258 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2025-04-13 19:44:05,258 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2025-04-13 19:44:05,258 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2025-04-13 19:44:05,258 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2025-04-13 19:44:05,258 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 19:44:05,258 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:44:05,259 WARN L247 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:44:05,259 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2025-04-13 19:44:05,401 INFO L143 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2025-04-13 19:44:05,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 327 transitions, 834 flow [2025-04-13 19:44:15,867 INFO L116 PetriNetUnfolderBase]: 49968/71596 cut-off events. [2025-04-13 19:44:15,867 INFO L117 PetriNetUnfolderBase]: For 49552/51452 co-relation queries the response was YES. [2025-04-13 19:44:17,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120977 conditions, 71596 events. 49968/71596 cut-off events. For 49552/51452 co-relation queries the response was YES. Maximal size of possible extension queue 2169. Compared 485492 event pairs, 12465 based on Foata normal form. 0/57873 useless extension candidates. Maximal degree in co-relation 57165. Up to 24576 conditions per place. [2025-04-13 19:44:17,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 327 transitions, 834 flow [2025-04-13 19:44:19,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 321 transitions, 822 flow [2025-04-13 19:44:19,278 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:44:19,278 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;@2f0cd1ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:44:19,278 INFO L341 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2025-04-13 19:44:19,290 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:44:19,291 INFO L116 PetriNetUnfolderBase]: 28/224 cut-off events. [2025-04-13 19:44:19,291 INFO L117 PetriNetUnfolderBase]: For 153/205 co-relation queries the response was YES. [2025-04-13 19:44:19,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:44:19,291 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:44:19,291 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-04-13 19:44:19,291 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:44:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1145661364, now seen corresponding path program 1 times [2025-04-13 19:44:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:44:19,291 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157877888] [2025-04-13 19:44:19,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:44:19,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:44:19,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:44:19,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:44:19,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:44:19,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:44:19,374 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 19:44:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:44:19,374 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157877888] [2025-04-13 19:44:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157877888] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:44:19,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:44:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:44:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402156975] [2025-04-13 19:44:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:44:19,379 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:44:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:44:19,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:44:19,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:44:19,399 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 327 [2025-04-13 19:44:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 321 transitions, 822 flow. Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 19:44:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:44:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 327 [2025-04-13 19:44:19,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand