./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:30:51,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:30:51,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:30:51,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:30:51,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:30:51,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:30:51,558 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:30:51,559 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:30:51,560 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:30:51,560 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:30:51,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:30:51,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:30:51,561 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:30:51,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:30:51,562 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:30:51,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:30:51,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:30:51,563 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:30:51,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:30:51,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:30:51,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:30:51,568 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:30:51,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:30:51,569 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:30:51,569 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:30:51,569 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:30:51,569 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:30:51,570 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:30:51,570 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:30:51,570 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:30:51,570 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:30:51,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:30:51,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:30:51,571 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:30:51,571 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:30:51,571 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:30:51,571 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:30:51,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:30:51,571 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:30:51,572 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:30:51,572 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:30:51,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:30:51,573 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2024-10-14 14:30:51,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:30:51,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:30:51,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:30:51,777 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:30:51,777 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:30:51,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2024-10-14 14:30:53,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:30:53,329 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:30:53,330 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2024-10-14 14:30:53,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fd4f32e4/324f60e4cece443ca831d0270dad6c3b/FLAG3911d1e8f [2024-10-14 14:30:53,697 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fd4f32e4/324f60e4cece443ca831d0270dad6c3b [2024-10-14 14:30:53,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:30:53,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:30:53,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:30:53,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:30:53,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:30:53,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:30:53" (1/1) ... [2024-10-14 14:30:53,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1391cf79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:53, skipping insertion in model container [2024-10-14 14:30:53,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:30:53" (1/1) ... [2024-10-14 14:30:53,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:30:53,956 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2024-10-14 14:30:53,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:30:53,998 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:30:54,031 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2024-10-14 14:30:54,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:30:54,079 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:30:54,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54 WrapperNode [2024-10-14 14:30:54,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:30:54,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:30:54,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:30:54,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:30:54,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,127 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2024-10-14 14:30:54,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:30:54,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:30:54,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:30:54,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:30:54,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,140 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,155 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-10-14 14:30:54,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,163 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:30:54,171 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:30:54,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:30:54,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:30:54,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (1/1) ... [2024-10-14 14:30:54,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:30:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:30:54,203 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) [2024-10-14 14:30:54,242 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 [2024-10-14 14:30:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:30:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:30:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 14:30:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:30:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-14 14:30:54,313 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 14:30:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 14:30:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:30:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:30:54,316 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:30:54,456 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:30:54,458 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:30:54,623 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:30:54,623 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:30:54,772 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:30:54,772 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-14 14:30:54,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:30:54 BoogieIcfgContainer [2024-10-14 14:30:54,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:30:54,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:30:54,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:30:54,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:30:54,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:30:53" (1/3) ... [2024-10-14 14:30:54,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9465537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:30:54, skipping insertion in model container [2024-10-14 14:30:54,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:54" (2/3) ... [2024-10-14 14:30:54,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9465537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:30:54, skipping insertion in model container [2024-10-14 14:30:54,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:30:54" (3/3) ... [2024-10-14 14:30:54,779 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2024-10-14 14:30:54,792 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:30:54,792 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:30:54,793 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:30:54,823 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-14 14:30:54,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2024-10-14 14:30:54,872 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2024-10-14 14:30:54,873 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:30:54,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2024-10-14 14:30:54,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2024-10-14 14:30:54,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2024-10-14 14:30:54,898 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:30:54,906 INFO L333 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;@6668d264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:30:54,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 14:30:54,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:30:54,922 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-10-14 14:30:54,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:30:54,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:30:54,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-14 14:30:54,924 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:30:54,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:30:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1987848411, now seen corresponding path program 1 times [2024-10-14 14:30:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:30:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098387059] [2024-10-14 14:30:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:30:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:30:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:30:55,049 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:30:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:30:55,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:30:55,095 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:30:55,096 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-14 14:30:55,098 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-14 14:30:55,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:30:55,098 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-14 14:30:55,101 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:30:55,101 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 14:30:55,117 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:30:55,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2024-10-14 14:30:55,138 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2024-10-14 14:30:55,139 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 14:30:55,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 488 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2024-10-14 14:30:55,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2024-10-14 14:30:55,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2024-10-14 14:30:55,142 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:30:55,143 INFO L333 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;@6668d264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:30:55,143 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 14:30:55,150 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:30:55,150 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-10-14 14:30:55,151 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:30:55,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:30:55,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:30:55,151 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:30:55,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:30:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash -635418086, now seen corresponding path program 1 times [2024-10-14 14:30:55,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:30:55,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633225751] [2024-10-14 14:30:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:30:55,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:30:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:30:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:30:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:30:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633225751] [2024-10-14 14:30:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633225751] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:30:55,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:30:55,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:30:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044621472] [2024-10-14 14:30:55,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:30:55,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:30:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:30:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:30:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:30:55,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 74 [2024-10-14 14:30:55,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-14 14:30:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:30:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 74 [2024-10-14 14:30:55,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:30:55,956 INFO L124 PetriNetUnfolderBase]: 2932/5765 cut-off events. [2024-10-14 14:30:55,956 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-14 14:30:55,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10537 conditions, 5765 events. 2932/5765 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 40626 event pairs, 2600 based on Foata normal form. 1412/6754 useless extension candidates. Maximal degree in co-relation 7065. Up to 4697 conditions per place. [2024-10-14 14:30:55,988 INFO L140 encePairwiseOnDemand]: 56/74 looper letters, 39 selfloop transitions, 2 changer transitions 11/71 dead transitions. [2024-10-14 14:30:55,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 258 flow [2024-10-14 14:30:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:30:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:30:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-10-14 14:30:56,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-10-14 14:30:56,002 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 164 flow. Second operand 3 states and 135 transitions. [2024-10-14 14:30:56,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 258 flow [2024-10-14 14:30:56,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:30:56,012 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 118 flow [2024-10-14 14:30:56,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-10-14 14:30:56,018 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-10-14 14:30:56,019 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 118 flow [2024-10-14 14:30:56,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-14 14:30:56,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:30:56,019 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-14 14:30:56,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:30:56,020 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:30:56,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:30:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 907108684, now seen corresponding path program 1 times [2024-10-14 14:30:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:30:56,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40434397] [2024-10-14 14:30:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:30:56,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:30:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:30:56,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:30:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:30:56,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:30:56,106 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:30:56,106 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-14 14:30:56,106 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-14 14:30:56,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:30:56,108 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-14 14:30:56,109 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:30:56,109 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 14:30:56,141 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 14:30:56,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2024-10-14 14:30:56,163 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2024-10-14 14:30:56,164 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-14 14:30:56,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 786 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2024-10-14 14:30:56,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2024-10-14 14:30:56,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2024-10-14 14:30:56,168 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:30:56,170 INFO L333 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;@6668d264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:30:56,170 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 14:30:56,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:30:56,175 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-10-14 14:30:56,175 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 14:30:56,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:30:56,176 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:30:56,176 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:30:56,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:30:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 701426586, now seen corresponding path program 1 times [2024-10-14 14:30:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:30:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86686282] [2024-10-14 14:30:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:30:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:30:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:30:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:30:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:30:56,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86686282] [2024-10-14 14:30:56,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86686282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:30:56,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:30:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:30:56,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069327122] [2024-10-14 14:30:56,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:30:56,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:30:56,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:30:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:30:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:30:56,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 99 [2024-10-14 14:30:56,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-10-14 14:30:56,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:30:56,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 99 [2024-10-14 14:30:56,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:31:02,184 INFO L124 PetriNetUnfolderBase]: 51087/83322 cut-off events. [2024-10-14 14:31:02,184 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2024-10-14 14:31:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155578 conditions, 83322 events. 51087/83322 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 712310 event pairs, 47355 based on Foata normal form. 23132/101410 useless extension candidates. Maximal degree in co-relation 75615. Up to 71288 conditions per place. [2024-10-14 14:31:02,701 INFO L140 encePairwiseOnDemand]: 75/99 looper letters, 50 selfloop transitions, 2 changer transitions 12/90 dead transitions. [2024-10-14 14:31:02,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 331 flow [2024-10-14 14:31:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:31:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:31:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-10-14 14:31:02,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-10-14 14:31:02,706 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 225 flow. Second operand 3 states and 174 transitions. [2024-10-14 14:31:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 331 flow [2024-10-14 14:31:02,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 331 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:31:02,715 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 162 flow [2024-10-14 14:31:02,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-10-14 14:31:02,716 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-10-14 14:31:02,716 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 162 flow [2024-10-14 14:31:02,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-10-14 14:31:02,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:31:02,717 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:31:02,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:31:02,717 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:31:02,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:31:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1585287908, now seen corresponding path program 1 times [2024-10-14 14:31:02,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:31:02,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795494671] [2024-10-14 14:31:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:31:02,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:31:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:31:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:31:02,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:31:02,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795494671] [2024-10-14 14:31:02,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795494671] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:31:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736446309] [2024-10-14 14:31:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:31:02,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:31:02,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:31:02,799 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) [2024-10-14 14:31:02,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:31:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:31:02,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:31:02,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:31:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:31:02,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:31:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:31:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736446309] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:31:02,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:31:02,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 14:31:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147793149] [2024-10-14 14:31:02,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:31:02,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:31:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:31:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:31:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:31:02,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 99 [2024-10-14 14:31:02,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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) [2024-10-14 14:31:02,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:31:02,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 99 [2024-10-14 14:31:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:31:04,037 INFO L124 PetriNetUnfolderBase]: 10250/17343 cut-off events. [2024-10-14 14:31:04,037 INFO L125 PetriNetUnfolderBase]: For 4289/4289 co-relation queries the response was YES. [2024-10-14 14:31:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33985 conditions, 17343 events. 10250/17343 cut-off events. For 4289/4289 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 127588 event pairs, 2024 based on Foata normal form. 1463/18604 useless extension candidates. Maximal degree in co-relation 3157. Up to 9922 conditions per place. [2024-10-14 14:31:04,335 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 97 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-10-14 14:31:04,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 123 transitions, 476 flow [2024-10-14 14:31:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:31:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:31:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 272 transitions. [2024-10-14 14:31:04,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2024-10-14 14:31:04,339 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 162 flow. Second operand 6 states and 272 transitions. [2024-10-14 14:31:04,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 123 transitions, 476 flow [2024-10-14 14:31:04,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:31:04,346 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-10-14 14:31:04,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-10-14 14:31:04,347 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2024-10-14 14:31:04,348 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-10-14 14:31:04,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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) [2024-10-14 14:31:04,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:31:04,348 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-14 14:31:04,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:31:04,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:31:04,550 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:31:04,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:31:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1351882244, now seen corresponding path program 1 times [2024-10-14 14:31:04,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:31:04,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648604468] [2024-10-14 14:31:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:31:04,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:31:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:31:04,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:31:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:31:04,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:31:04,615 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:31:04,615 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-14 14:31:04,615 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-14 14:31:04,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:31:04,616 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-14 14:31:04,616 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:31:04,617 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-14 14:31:04,647 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-14 14:31:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2024-10-14 14:31:04,677 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2024-10-14 14:31:04,677 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-14 14:31:04,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1242 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2024-10-14 14:31:04,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2024-10-14 14:31:04,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2024-10-14 14:31:04,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:31:04,685 INFO L333 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;@6668d264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:31:04,687 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 14:31:04,691 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:31:04,691 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-10-14 14:31:04,692 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 14:31:04,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:31:04,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:31:04,692 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:31:04,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:31:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash -183768678, now seen corresponding path program 1 times [2024-10-14 14:31:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:31:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843220267] [2024-10-14 14:31:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:31:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:31:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:31:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:31:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:31:04,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843220267] [2024-10-14 14:31:04,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843220267] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:31:04,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:31:04,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:31:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978496773] [2024-10-14 14:31:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:31:04,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:31:04,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:31:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:31:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:31:04,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 124 [2024-10-14 14:31:04,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-10-14 14:31:04,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:31:04,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 124 [2024-10-14 14:31:04,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand