/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_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:42:49,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:42:50,058 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 19:42:50,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:42:50,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:42:50,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:42:50,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:42:50,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:42:50,086 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:42:50,086 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:42:50,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:42:50,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:42:50,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:42:50,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:42:50,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:42:50,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:42:50,089 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:42:50,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:42:50,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:42:50,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:42:50,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:42:50,090 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 19:42:50,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:42:50,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:42:50,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:42:50,316 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:42:50,316 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:42:50,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2025-04-13 19:42:51,560 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c60f01f9/dd8f90b84b5f4b3791b655e76c7c404f/FLAG850776bf7 [2025-04-13 19:42:51,850 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:42:51,851 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2025-04-13 19:42:51,867 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c60f01f9/dd8f90b84b5f4b3791b655e76c7c404f/FLAG850776bf7 [2025-04-13 19:42:52,610 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c60f01f9/dd8f90b84b5f4b3791b655e76c7c404f [2025-04-13 19:42:52,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:42:52,615 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:42:52,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:42:52,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:42:52,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:42:52,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:42:52" (1/1) ... [2025-04-13 19:42:52,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84d1e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:52, skipping insertion in model container [2025-04-13 19:42:52,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:42:52" (1/1) ... [2025-04-13 19:42:52,656 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:42:52,946 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_70-funloop_racefree.i[41323,41336] [2025-04-13 19:42:52,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:42:52,994 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:42:53,050 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_70-funloop_racefree.i[41323,41336] [2025-04-13 19:42:53,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:42:53,099 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:42:53,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53 WrapperNode [2025-04-13 19:42:53,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:42:53,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:42:53,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:42:53,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:42:53,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,151 INFO L138 Inliner]: procedures = 272, calls = 95, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 252 [2025-04-13 19:42:53,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:42:53,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:42:53,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:42:53,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:42:53,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,191 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 2, 70]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 0, 60]. The 5 writes are split as follows [0, 0, 1, 4]. [2025-04-13 19:42:53,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,200 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:42:53,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:42:53,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:42:53,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:42:53,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (1/1) ... [2025-04-13 19:42:53,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:42:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:42:53,237 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 19:42:53,238 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 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-04-13 19:42:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:42:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:42:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 19:42:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:42:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:42:53,256 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 19:42:53,373 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:42:53,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:42:53,704 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:42:53,704 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:42:53,704 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:42:54,040 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,040 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,041 WARN L179 LargeBlockEncoding]: Complex 3:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,044 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,047 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,049 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,050 WARN L179 LargeBlockEncoding]: Complex 3:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,054 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,057 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,061 WARN L179 LargeBlockEncoding]: Complex 2:4 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:42:54,063 INFO L313 CfgBuilder]: Removed 10 assume(true) statements. [2025-04-13 19:42:54,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:42:54 BoogieIcfgContainer [2025-04-13 19:42:54,063 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:42:54,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:42:54,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:42:54,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:42:54,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:42:52" (1/3) ... [2025-04-13 19:42:54,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b17284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:42:54, skipping insertion in model container [2025-04-13 19:42:54,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:42:53" (2/3) ... [2025-04-13 19:42:54,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b17284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:42:54, skipping insertion in model container [2025-04-13 19:42:54,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:42:54" (3/3) ... [2025-04-13 19:42:54,071 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2025-04-13 19:42:54,081 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:42:54,082 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_70-funloop_racefree.i that has 2 procedures, 45 locations, 85 edges, 1 initial locations, 15 loop locations, and 2 error locations. [2025-04-13 19:42:54,083 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:42:54,132 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-04-13 19:42:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 86 transitions, 179 flow [2025-04-13 19:42:54,195 INFO L116 PetriNetUnfolderBase]: 56/121 cut-off events. [2025-04-13 19:42:54,198 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:42:54,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 121 events. 56/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 379 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 75. Up to 14 conditions per place. [2025-04-13 19:42:54,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 86 transitions, 179 flow [2025-04-13 19:42:54,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 81 transitions, 166 flow [2025-04-13 19:42:54,215 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:42:54,224 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;@71d6fd66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:42:54,224 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 19:42:54,233 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:42:54,233 INFO L116 PetriNetUnfolderBase]: 6/21 cut-off events. [2025-04-13 19:42:54,233 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:42:54,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:54,233 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-04-13 19:42:54,234 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 19:42:54,237 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:54,238 INFO L85 PathProgramCache]: Analyzing trace with hash 763791160, now seen corresponding path program 1 times [2025-04-13 19:42:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:54,243 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438217938] [2025-04-13 19:42:54,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:54,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-13 19:42:54,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-13 19:42:54,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:54,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:54,491 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 19:42:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:54,492 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438217938] [2025-04-13 19:42:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438217938] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:42:54,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:42:54,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:42:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437718080] [2025-04-13 19:42:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:42:54,499 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:42:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:54,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:42:54,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:42:54,518 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 86 [2025-04-13 19:42:54,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 81 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 19:42:54,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:54,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 86 [2025-04-13 19:42:54,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:42:54,753 INFO L116 PetriNetUnfolderBase]: 463/888 cut-off events. [2025-04-13 19:42:54,753 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:42:54,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 888 events. 463/888 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4041 event pairs, 380 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 1762. Up to 886 conditions per place. [2025-04-13 19:42:54,763 INFO L140 encePairwiseOnDemand]: 50/86 looper letters, 46 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2025-04-13 19:42:54,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 198 flow [2025-04-13 19:42:54,764 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:42:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:42:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-04-13 19:42:54,772 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 19:42:54,773 INFO L175 Difference]: Start difference. First operand has 47 places, 81 transitions, 166 flow. Second operand 3 states and 86 transitions. [2025-04-13 19:42:54,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 198 flow [2025-04-13 19:42:54,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 19:42:54,780 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 112 flow [2025-04-13 19:42:54,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-04-13 19:42:54,786 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2025-04-13 19:42:54,786 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 112 flow [2025-04-13 19:42:54,786 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 19:42:54,786 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:54,786 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-13 19:42:54,786 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:42:54,787 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 19:42:54,787 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2095303648, now seen corresponding path program 1 times [2025-04-13 19:42:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:54,787 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155208909] [2025-04-13 19:42:54,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:54,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:42:54,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:42:54,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:54,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:54,913 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 19:42:54,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:54,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155208909] [2025-04-13 19:42:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155208909] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:42:54,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504545805] [2025-04-13 19:42:54,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:54,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:42:54,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:42:54,915 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 19:42:54,917 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 19:42:54,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:42:55,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:42:55,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:55,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:55,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:42:55,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:42:55,037 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 19:42:55,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:42:55,053 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 19:42:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504545805] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:42:55,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:42:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-04-13 19:42:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078629411] [2025-04-13 19:42:55,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:42:55,054 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:42:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:55,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:42:55,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:42:55,055 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 86 [2025-04-13 19:42:55,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 19:42:55,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:55,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 86 [2025-04-13 19:42:55,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:42:55,301 INFO L116 PetriNetUnfolderBase]: 463/891 cut-off events. [2025-04-13 19:42:55,302 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:42:55,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 891 events. 463/891 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4041 event pairs, 380 based on Foata normal form. 0/747 useless extension candidates. Maximal degree in co-relation 1783. Up to 886 conditions per place. [2025-04-13 19:42:55,306 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 46 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2025-04-13 19:42:55,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 226 flow [2025-04-13 19:42:55,306 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:42:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:42:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-04-13 19:42:55,307 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.11627906976744186 [2025-04-13 19:42:55,307 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 112 flow. Second operand 6 states and 60 transitions. [2025-04-13 19:42:55,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 226 flow [2025-04-13 19:42:55,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 19:42:55,309 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 144 flow [2025-04-13 19:42:55,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2025-04-13 19:42:55,309 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2025-04-13 19:42:55,310 INFO L485 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 144 flow [2025-04-13 19:42:55,310 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 19:42:55,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:55,310 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2025-04-13 19:42:55,317 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 19:42:55,510 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:42:55,511 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 19:42:55,511 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:55,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1140948680, now seen corresponding path program 2 times [2025-04-13 19:42:55,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:55,511 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779933177] [2025-04-13 19:42:55,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:42:55,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:55,528 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 19:42:55,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 19:42:55,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:42:55,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:55,674 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 19:42:55,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:55,675 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779933177] [2025-04-13 19:42:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779933177] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:42:55,675 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503085974] [2025-04-13 19:42:55,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:42:55,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:42:55,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:42:55,679 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 19:42:55,680 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 19:42:55,734 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 19:42:55,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 19:42:55,764 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:42:55,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:55,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:42:55,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:42:55,783 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 19:42:55,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:42:55,836 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 19:42:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503085974] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:42:55,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:42:55,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-13 19:42:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884155211] [2025-04-13 19:42:55,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:42:55,837 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:42:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:55,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:42:55,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:42:55,837 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 86 [2025-04-13 19:42:55,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 19:42:55,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:55,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 86 [2025-04-13 19:42:55,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:42:56,008 INFO L116 PetriNetUnfolderBase]: 463/897 cut-off events. [2025-04-13 19:42:56,008 INFO L117 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-04-13 19:42:56,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 897 events. 463/897 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4046 event pairs, 380 based on Foata normal form. 6/760 useless extension candidates. Maximal degree in co-relation 1774. Up to 886 conditions per place. [2025-04-13 19:42:56,012 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 46 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2025-04-13 19:42:56,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 294 flow [2025-04-13 19:42:56,012 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:42:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:42:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 75 transitions. [2025-04-13 19:42:56,013 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.07267441860465117 [2025-04-13 19:42:56,013 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 144 flow. Second operand 12 states and 75 transitions. [2025-04-13 19:42:56,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 294 flow [2025-04-13 19:42:56,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 280 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 19:42:56,016 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 214 flow [2025-04-13 19:42:56,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=214, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2025-04-13 19:42:56,016 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 25 predicate places. [2025-04-13 19:42:56,016 INFO L485 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 214 flow [2025-04-13 19:42:56,016 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 19:42:56,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:56,017 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2025-04-13 19:42:56,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 19:42:56,217 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-13 19:42:56,217 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 19:42:56,218 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 531765304, now seen corresponding path program 3 times [2025-04-13 19:42:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:56,218 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811389090] [2025-04-13 19:42:56,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:42:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:56,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 6 equivalence classes. [2025-04-13 19:42:56,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:42:56,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:42:56,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:42:56,273 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:42:56,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 19:42:56,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:42:56,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:56,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:42:56,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:42:56,315 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:42:56,317 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-04-13 19:42:56,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-04-13 19:42:56,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-04-13 19:42:56,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-13 19:42:56,319 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:42:56,319 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1] [2025-04-13 19:42:56,321 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:42:56,321 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 19:42:56,355 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 19:42:56,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 124 transitions, 264 flow [2025-04-13 19:42:56,372 INFO L116 PetriNetUnfolderBase]: 94/204 cut-off events. [2025-04-13 19:42:56,373 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-13 19:42:56,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 204 events. 94/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 789 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 123. Up to 21 conditions per place. [2025-04-13 19:42:56,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 124 transitions, 264 flow [2025-04-13 19:42:56,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 122 transitions, 260 flow [2025-04-13 19:42:56,376 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:42:56,376 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;@71d6fd66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:42:56,376 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 19:42:56,385 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:42:56,386 INFO L116 PetriNetUnfolderBase]: 22/61 cut-off events. [2025-04-13 19:42:56,386 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 19:42:56,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:56,386 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-13 19:42:56,387 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:42:56,387 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1574687962, now seen corresponding path program 1 times [2025-04-13 19:42:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:56,388 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345471287] [2025-04-13 19:42:56,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:56,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:42:56,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:42:56,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:56,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:56,409 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 19:42:56,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:56,410 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345471287] [2025-04-13 19:42:56,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345471287] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:42:56,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:42:56,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:42:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427172996] [2025-04-13 19:42:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:42:56,411 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:42:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:56,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:42:56,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:42:56,411 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 124 [2025-04-13 19:42:56,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 122 transitions, 260 flow. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 19:42:56,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:56,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 124 [2025-04-13 19:42:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:42:57,957 INFO L116 PetriNetUnfolderBase]: 18649/27577 cut-off events. [2025-04-13 19:42:57,957 INFO L117 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2025-04-13 19:42:57,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55259 conditions, 27577 events. 18649/27577 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 165568 event pairs, 16055 based on Foata normal form. 0/23257 useless extension candidates. Maximal degree in co-relation 47942. Up to 27575 conditions per place. [2025-04-13 19:42:58,097 INFO L140 encePairwiseOnDemand]: 76/124 looper letters, 73 selfloop transitions, 0 changer transitions 0/74 dead transitions. [2025-04-13 19:42:58,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 310 flow [2025-04-13 19:42:58,097 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:42:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:42:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 123 transitions. [2025-04-13 19:42:58,099 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4959677419354839 [2025-04-13 19:42:58,099 INFO L175 Difference]: Start difference. First operand has 70 places, 122 transitions, 260 flow. Second operand 2 states and 123 transitions. [2025-04-13 19:42:58,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 310 flow [2025-04-13 19:42:58,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 19:42:58,103 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 164 flow [2025-04-13 19:42:58,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2025-04-13 19:42:58,104 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2025-04-13 19:42:58,104 INFO L485 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 164 flow [2025-04-13 19:42:58,104 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 19:42:58,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:58,104 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-04-13 19:42:58,104 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 19:42:58,104 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:42:58,105 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1646858702, now seen corresponding path program 1 times [2025-04-13 19:42:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:58,105 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296108280] [2025-04-13 19:42:58,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:58,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:42:58,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:42:58,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:58,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:58,217 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 19:42:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:58,218 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296108280] [2025-04-13 19:42:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296108280] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:42:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:42:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:42:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489823008] [2025-04-13 19:42:58,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:42:58,218 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:42:58,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:58,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:42:58,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:42:58,219 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 124 [2025-04-13 19:42:58,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 19:42:58,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:58,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 124 [2025-04-13 19:42:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:42:59,374 INFO L116 PetriNetUnfolderBase]: 18649/27578 cut-off events. [2025-04-13 19:42:59,374 INFO L117 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2025-04-13 19:42:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55262 conditions, 27578 events. 18649/27578 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 165562 event pairs, 16055 based on Foata normal form. 0/23258 useless extension candidates. Maximal degree in co-relation 55257. Up to 27575 conditions per place. [2025-04-13 19:42:59,484 INFO L140 encePairwiseOnDemand]: 121/124 looper letters, 72 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-04-13 19:42:59,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 314 flow [2025-04-13 19:42:59,485 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:42:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:42:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2025-04-13 19:42:59,486 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.20967741935483872 [2025-04-13 19:42:59,486 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 164 flow. Second operand 3 states and 78 transitions. [2025-04-13 19:42:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 314 flow [2025-04-13 19:42:59,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 19:42:59,490 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 176 flow [2025-04-13 19:42:59,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2025-04-13 19:42:59,491 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2025-04-13 19:42:59,491 INFO L485 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 176 flow [2025-04-13 19:42:59,491 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 19:42:59,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:42:59,491 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-04-13 19:42:59,491 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 19:42:59,492 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:42:59,492 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:42:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -99032902, now seen corresponding path program 1 times [2025-04-13 19:42:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:42:59,492 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511870501] [2025-04-13 19:42:59,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:42:59,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:42:59,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:42:59,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:59,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:59,562 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 19:42:59,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:42:59,563 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511870501] [2025-04-13 19:42:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511870501] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:42:59,563 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309430085] [2025-04-13 19:42:59,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:42:59,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:42:59,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:42:59,566 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 19:42:59,568 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 19:42:59,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:42:59,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:42:59,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:42:59,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:42:59,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:42:59,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:42:59,663 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 19:42:59,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:42:59,676 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 19:42:59,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309430085] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:42:59,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:42:59,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-04-13 19:42:59,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133115129] [2025-04-13 19:42:59,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:42:59,677 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:42:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:42:59,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:42:59,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:42:59,678 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 124 [2025-04-13 19:42:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:42:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:42:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 124 [2025-04-13 19:42:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:43:01,132 INFO L116 PetriNetUnfolderBase]: 18649/27581 cut-off events. [2025-04-13 19:43:01,133 INFO L117 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2025-04-13 19:43:01,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55278 conditions, 27581 events. 18649/27581 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 165562 event pairs, 16055 based on Foata normal form. 0/23261 useless extension candidates. Maximal degree in co-relation 55271. Up to 27575 conditions per place. [2025-04-13 19:43:01,209 INFO L140 encePairwiseOnDemand]: 121/124 looper letters, 72 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2025-04-13 19:43:01,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 342 flow [2025-04-13 19:43:01,209 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:43:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:43:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-04-13 19:43:01,210 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.11559139784946236 [2025-04-13 19:43:01,210 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 176 flow. Second operand 6 states and 86 transitions. [2025-04-13 19:43:01,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 342 flow [2025-04-13 19:43:01,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 338 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 19:43:01,212 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 208 flow [2025-04-13 19:43:01,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2025-04-13 19:43:01,213 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2025-04-13 19:43:01,213 INFO L485 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 208 flow [2025-04-13 19:43:01,213 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:43:01,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:43:01,213 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2025-04-13 19:43:01,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 19:43:01,417 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:43:01,417 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:43:01,417 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:43:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -954503986, now seen corresponding path program 2 times [2025-04-13 19:43:01,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:43:01,417 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613431805] [2025-04-13 19:43:01,417 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:43:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:43:01,424 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-04-13 19:43:01,431 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:43:01,431 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:43:01,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:43:01,485 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 19:43:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:43:01,485 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613431805] [2025-04-13 19:43:01,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613431805] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:43:01,485 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43823380] [2025-04-13 19:43:01,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:43:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:43:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:43:01,487 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 19:43:01,489 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 19:43:01,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-04-13 19:43:01,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:43:01,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:43:01,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:43:01,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:43:01,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:43:01,578 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 19:43:01,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:43:01,620 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 19:43:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43823380] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:43:01,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:43:01,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-13 19:43:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288047271] [2025-04-13 19:43:01,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:43:01,621 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:43:01,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:43:01,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:43:01,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:43:01,621 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 124 [2025-04-13 19:43:01,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 208 flow. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:43:01,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:43:01,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 124 [2025-04-13 19:43:01,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:43:03,011 INFO L116 PetriNetUnfolderBase]: 18649/27587 cut-off events. [2025-04-13 19:43:03,012 INFO L117 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2025-04-13 19:43:03,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55315 conditions, 27587 events. 18649/27587 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 165579 event pairs, 16055 based on Foata normal form. 6/23274 useless extension candidates. Maximal degree in co-relation 55305. Up to 27575 conditions per place. [2025-04-13 19:43:03,125 INFO L140 encePairwiseOnDemand]: 121/124 looper letters, 72 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2025-04-13 19:43:03,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 410 flow [2025-04-13 19:43:03,125 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:43:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:43:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 101 transitions. [2025-04-13 19:43:03,126 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.0678763440860215 [2025-04-13 19:43:03,126 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 208 flow. Second operand 12 states and 101 transitions. [2025-04-13 19:43:03,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 410 flow [2025-04-13 19:43:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 19:43:03,129 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 278 flow [2025-04-13 19:43:03,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=278, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2025-04-13 19:43:03,129 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2025-04-13 19:43:03,129 INFO L485 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 278 flow [2025-04-13 19:43:03,129 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:43:03,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:43:03,129 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2025-04-13 19:43:03,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 19:43:03,334 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:43:03,334 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:43:03,334 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:43:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1871927986, now seen corresponding path program 3 times [2025-04-13 19:43:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:43:03,334 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12226290] [2025-04-13 19:43:03,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:43:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:43:03,343 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 6 equivalence classes. [2025-04-13 19:43:03,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:43:03,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:43:03,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:43:03,375 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:43:03,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 19:43:03,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:43:03,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:43:03,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:43:03,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:43:03,397 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:43:03,397 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-04-13 19:43:03,397 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-13 19:43:03,397 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-04-13 19:43:03,397 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-04-13 19:43:03,397 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 19:43:03,397 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-13 19:43:03,397 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2025-04-13 19:43:03,399 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:43:03,399 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 19:43:03,422 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 19:43:03,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 162 transitions, 351 flow [2025-04-13 19:43:03,440 INFO L116 PetriNetUnfolderBase]: 135/296 cut-off events. [2025-04-13 19:43:03,440 INFO L117 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-04-13 19:43:03,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 296 events. 135/296 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1255 event pairs, 1 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 213. Up to 28 conditions per place. [2025-04-13 19:43:03,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 162 transitions, 351 flow [2025-04-13 19:43:03,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 160 transitions, 347 flow [2025-04-13 19:43:03,444 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:43:03,445 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;@71d6fd66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:43:03,445 INFO L341 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-04-13 19:43:03,450 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:43:03,450 INFO L116 PetriNetUnfolderBase]: 22/61 cut-off events. [2025-04-13 19:43:03,450 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 19:43:03,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:43:03,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-13 19:43:03,450 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-04-13 19:43:03,451 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:43:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2072240538, now seen corresponding path program 1 times [2025-04-13 19:43:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:43:03,451 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985326872] [2025-04-13 19:43:03,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:43:03,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:43:03,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:43:03,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:43:03,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:43:03,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:43:03,464 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 19:43:03,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:43:03,465 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985326872] [2025-04-13 19:43:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985326872] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:43:03,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:43:03,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:43:03,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963708894] [2025-04-13 19:43:03,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:43:03,465 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:43:03,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:43:03,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:43:03,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:43:03,466 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 162 [2025-04-13 19:43:03,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 160 transitions, 347 flow. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 19:43:03,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:43:03,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 162 [2025-04-13 19:43:03,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:43:34,617 INFO L116 PetriNetUnfolderBase]: 563493/743692 cut-off events. [2025-04-13 19:43:34,618 INFO L117 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2025-04-13 19:43:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490360 conditions, 743692 events. 563493/743692 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 11964. Compared 5014842 event pairs, 493412 based on Foata normal form. 0/629583 useless extension candidates. Maximal degree in co-relation 540772. Up to 743679 conditions per place. [2025-04-13 19:43:37,863 INFO L140 encePairwiseOnDemand]: 99/162 looper letters, 96 selfloop transitions, 0 changer transitions 0/97 dead transitions. [2025-04-13 19:43:37,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 413 flow [2025-04-13 19:43:37,864 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:43:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:43:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 161 transitions. [2025-04-13 19:43:37,868 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2025-04-13 19:43:37,868 INFO L175 Difference]: Start difference. First operand has 92 places, 160 transitions, 347 flow. Second operand 2 states and 161 transitions. [2025-04-13 19:43:37,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 413 flow [2025-04-13 19:43:37,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 413 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 19:43:37,877 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 221 flow [2025-04-13 19:43:37,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=221, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2025-04-13 19:43:37,878 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2025-04-13 19:43:37,878 INFO L485 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 221 flow [2025-04-13 19:43:37,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 19:43:37,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:43:37,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:43:37,878 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-13 19:43:37,878 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-04-13 19:43:37,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:43:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2084376562, now seen corresponding path program 1 times [2025-04-13 19:43:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:43:37,882 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418639309] [2025-04-13 19:43:37,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:43:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:43:37,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:43:37,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:43:37,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:43:37,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:43:37,912 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 19:43:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:43:37,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418639309] [2025-04-13 19:43:37,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418639309] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:43:37,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:43:37,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:43:37,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687055780] [2025-04-13 19:43:37,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:43:37,913 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:43:37,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:43:37,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:43:37,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:43:37,914 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 162 [2025-04-13 19:43:37,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 19:43:37,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:43:37,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 162 [2025-04-13 19:43:37,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand