./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.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/pthread-complex/safestack_relacy.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 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:28:26,968 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:28:27,033 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:28:27,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:28:27,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:28:27,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:28:27,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:28:27,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:28:27,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:28:27,062 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:28:27,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:28:27,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:28:27,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:28:27,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:28:27,065 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:28:27,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:28:27,065 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:28:27,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:28:27,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:28:27,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:28:27,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:28:27,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:28:27,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:28:27,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:28:27,069 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:28:27,069 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:28:27,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:28:27,069 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:28:27,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:28:27,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:28:27,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:28:27,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:28:27,071 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:28:27,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:28:27,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:28:27,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:28:27,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2024-10-14 14:28:27,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:28:27,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:28:27,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:28:27,274 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:28:27,274 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:28:27,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-10-14 14:28:28,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:28:28,690 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:28:28,691 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-10-14 14:28:28,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/427186a0a/d024b850782541e8bb6548297c293ce2/FLAG5852d88d2 [2024-10-14 14:28:28,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/427186a0a/d024b850782541e8bb6548297c293ce2 [2024-10-14 14:28:28,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:28:28,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:28:28,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:28:28,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:28:28,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:28:28,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:28:28" (1/1) ... [2024-10-14 14:28:28,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f375f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:28, skipping insertion in model container [2024-10-14 14:28:28,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:28:28" (1/1) ... [2024-10-14 14:28:28,791 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:28:29,259 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/pthread-complex/safestack_relacy.i[78860,78873] [2024-10-14 14:28:29,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:28:29,278 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:28:29,331 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/pthread-complex/safestack_relacy.i[78860,78873] [2024-10-14 14:28:29,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:28:29,399 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:28:29,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29 WrapperNode [2024-10-14 14:28:29,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:28:29,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:28:29,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:28:29,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:28:29,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,454 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 286 [2024-10-14 14:28:29,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:28:29,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:28:29,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:28:29,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:28:29,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,468 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,489 INFO L175 MemorySlicer]: Split 48 memory accesses to 4 slices as follows [2, 5, 34, 7]. 71 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 3, 8, 2]. The 15 writes are split as follows [0, 1, 12, 2]. [2024-10-14 14:28:29,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:28:29,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:28:29,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:28:29,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:28:29,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (1/1) ... [2024-10-14 14:28:29,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:28:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:28:29,554 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 14:28:29,556 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 14:28:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:28:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 14:28:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:28:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:28:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:28:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 14:28:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 14:28:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-10-14 14:28:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-10-14 14:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:28:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 14:28:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 14:28:29,612 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 14:28:29,810 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:28:29,812 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:28:30,087 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:28:30,087 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:28:30,269 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:28:30,269 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-14 14:28:30,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:28:30 BoogieIcfgContainer [2024-10-14 14:28:30,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:28:30,272 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:28:30,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:28:30,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:28:30,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:28:28" (1/3) ... [2024-10-14 14:28:30,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58904171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:28:30, skipping insertion in model container [2024-10-14 14:28:30,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:29" (2/3) ... [2024-10-14 14:28:30,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58904171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:28:30, skipping insertion in model container [2024-10-14 14:28:30,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:28:30" (3/3) ... [2024-10-14 14:28:30,301 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-10-14 14:28:30,314 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:28:30,314 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:28:30,314 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:28:30,363 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-14 14:28:30,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 133 flow [2024-10-14 14:28:30,419 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2024-10-14 14:28:30,419 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:28:30,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 12/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2024-10-14 14:28:30,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 133 flow [2024-10-14 14:28:30,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 126 flow [2024-10-14 14:28:30,434 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:28:30,440 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;@2d7c30aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:28:30,440 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:28:30,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:28:30,446 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2024-10-14 14:28:30,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:28:30,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:30,447 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:30,447 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:28:30,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1631325735, now seen corresponding path program 1 times [2024-10-14 14:28:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:30,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643949197] [2024-10-14 14:28:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643949197] [2024-10-14 14:28:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643949197] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:28:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:28:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:28:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066714911] [2024-10-14 14:28:30,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:28:30,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:28:30,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:28:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:28:30,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-10-14 14:28:30,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:28:30,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-10-14 14:28:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:31,082 INFO L124 PetriNetUnfolderBase]: 182/404 cut-off events. [2024-10-14 14:28:31,083 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:28:31,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 404 events. 182/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1408 event pairs, 145 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 732. Up to 355 conditions per place. [2024-10-14 14:28:31,087 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-10-14 14:28:31,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 230 flow [2024-10-14 14:28:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:28:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:28:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-10-14 14:28:31,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-10-14 14:28:31,101 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 126 flow. Second operand 4 states and 86 transitions. [2024-10-14 14:28:31,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 230 flow [2024-10-14 14:28:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:28:31,105 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 134 flow [2024-10-14 14:28:31,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-10-14 14:28:31,109 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-10-14 14:28:31,109 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 134 flow [2024-10-14 14:28:31,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:28:31,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:31,110 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:31,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:28:31,110 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:28:31,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1697882588, now seen corresponding path program 1 times [2024-10-14 14:28:31,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114634608] [2024-10-14 14:28:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:31,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114634608] [2024-10-14 14:28:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114634608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:28:31,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138867315] [2024-10-14 14:28:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:28:31,240 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 14:28:31,242 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 14:28:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:31,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:28:31,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:28:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:31,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:28:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:31,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138867315] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:28:31,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:28:31,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-14 14:28:31,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209907983] [2024-10-14 14:28:31,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:28:31,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:28:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:28:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-14 14:28:31,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-10-14 14:28:31,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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 14:28:31,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:31,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-10-14 14:28:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:31,607 INFO L124 PetriNetUnfolderBase]: 182/405 cut-off events. [2024-10-14 14:28:31,607 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:28:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 405 events. 182/405 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1405 event pairs, 145 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 750. Up to 355 conditions per place. [2024-10-14 14:28:31,611 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-10-14 14:28:31,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 248 flow [2024-10-14 14:28:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:28:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:28:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-10-14 14:28:31,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-10-14 14:28:31,612 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 134 flow. Second operand 5 states and 90 transitions. [2024-10-14 14:28:31,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 248 flow [2024-10-14 14:28:31,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:28:31,614 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 154 flow [2024-10-14 14:28:31,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-10-14 14:28:31,614 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-10-14 14:28:31,615 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 154 flow [2024-10-14 14:28:31,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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 14:28:31,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:31,617 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:31,630 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 14:28:31,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:31,819 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:28:31,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash 218199559, now seen corresponding path program 2 times [2024-10-14 14:28:31,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:31,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000378917] [2024-10-14 14:28:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:31,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:28:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:31,893 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:28:31,893 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:28:31,894 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-14 14:28:31,895 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-14 14:28:31,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-14 14:28:31,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:28:31,896 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-10-14 14:28:31,898 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:28:31,899 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 14:28:31,960 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:28:31,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 108 transitions, 232 flow [2024-10-14 14:28:31,976 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2024-10-14 14:28:31,976 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 14:28:31,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 123 events. 24/123 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 405 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2024-10-14 14:28:31,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 108 transitions, 232 flow [2024-10-14 14:28:31,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 108 transitions, 232 flow [2024-10-14 14:28:31,981 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:28:31,985 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;@2d7c30aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:28:31,985 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:28:31,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:28:31,989 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2024-10-14 14:28:31,989 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:28:31,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:31,990 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:31,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:28:31,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:31,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1219984579, now seen corresponding path program 1 times [2024-10-14 14:28:31,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309362191] [2024-10-14 14:28:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:31,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:28:32,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:32,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309362191] [2024-10-14 14:28:32,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309362191] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:28:32,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:28:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:28:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249289176] [2024-10-14 14:28:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:28:32,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:28:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:28:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:28:32,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-10-14 14:28:32,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:28:32,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:32,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-10-14 14:28:32,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:33,676 INFO L124 PetriNetUnfolderBase]: 12511/19356 cut-off events. [2024-10-14 14:28:33,678 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2024-10-14 14:28:33,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37916 conditions, 19356 events. 12511/19356 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 115960 event pairs, 10774 based on Foata normal form. 395/15619 useless extension candidates. Maximal degree in co-relation 33123. Up to 18390 conditions per place. [2024-10-14 14:28:33,778 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 86 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2024-10-14 14:28:33,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 402 flow [2024-10-14 14:28:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:28:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:28:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2024-10-14 14:28:33,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34953703703703703 [2024-10-14 14:28:33,781 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 232 flow. Second operand 4 states and 151 transitions. [2024-10-14 14:28:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 402 flow [2024-10-14 14:28:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:28:33,784 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 232 flow [2024-10-14 14:28:33,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-10-14 14:28:33,784 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-10-14 14:28:33,785 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 232 flow [2024-10-14 14:28:33,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:28:33,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:33,785 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:33,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:28:33,785 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:28:33,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 405578324, now seen corresponding path program 1 times [2024-10-14 14:28:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431135318] [2024-10-14 14:28:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:28:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431135318] [2024-10-14 14:28:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431135318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:28:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177772723] [2024-10-14 14:28:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:28:33,924 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) [2024-10-14 14:28:33,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:28:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:34,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:28:34,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:28:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:28:34,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:28:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:28:34,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177772723] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:28:34,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:28:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-14 14:28:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856849919] [2024-10-14 14:28:34,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:28:34,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:28:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:28:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-14 14:28:34,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-10-14 14:28:34,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:28:34,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:34,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-10-14 14:28:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:35,534 INFO L124 PetriNetUnfolderBase]: 12511/19357 cut-off events. [2024-10-14 14:28:35,535 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-10-14 14:28:35,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37927 conditions, 19357 events. 12511/19357 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 116000 event pairs, 10774 based on Foata normal form. 1/15227 useless extension candidates. Maximal degree in co-relation 37889. Up to 18390 conditions per place. [2024-10-14 14:28:35,610 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 85 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2024-10-14 14:28:35,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 420 flow [2024-10-14 14:28:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:28:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:28:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-10-14 14:28:35,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29074074074074074 [2024-10-14 14:28:35,612 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 232 flow. Second operand 5 states and 157 transitions. [2024-10-14 14:28:35,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 420 flow [2024-10-14 14:28:35,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:28:35,615 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 252 flow [2024-10-14 14:28:35,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-10-14 14:28:35,615 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2024-10-14 14:28:35,616 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 252 flow [2024-10-14 14:28:35,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:28:35,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:35,616 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:35,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:28:35,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:35,821 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:28:35,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1793759197, now seen corresponding path program 2 times [2024-10-14 14:28:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:35,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337374172] [2024-10-14 14:28:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:35,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:28:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:35,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:28:35,872 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:28:35,872 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-14 14:28:35,872 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-14 14:28:35,872 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-14 14:28:35,872 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-14 14:28:35,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:28:35,873 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-10-14 14:28:35,874 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:28:35,874 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 14:28:35,932 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 14:28:35,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 153 transitions, 333 flow [2024-10-14 14:28:35,947 INFO L124 PetriNetUnfolderBase]: 39/190 cut-off events. [2024-10-14 14:28:35,947 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-14 14:28:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 39/190 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 1 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 151. Up to 12 conditions per place. [2024-10-14 14:28:35,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 153 transitions, 333 flow [2024-10-14 14:28:35,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 153 transitions, 333 flow [2024-10-14 14:28:35,950 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:28:35,951 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;@2d7c30aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:28:35,951 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-14 14:28:35,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:28:35,954 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2024-10-14 14:28:35,954 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 14:28:35,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:35,954 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:35,954 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:28:35,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1986283186, now seen corresponding path program 1 times [2024-10-14 14:28:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653433905] [2024-10-14 14:28:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:36,112 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 14:28:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653433905] [2024-10-14 14:28:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653433905] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:28:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:28:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:28:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672191836] [2024-10-14 14:28:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:28:36,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:28:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:28:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:28:36,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 153 [2024-10-14 14:28:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 14:28:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 153 [2024-10-14 14:28:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand