./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.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 41cf9d90b654ba629ed26494b45977a61fd5035aced9f092d4e43a94133522bd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:06:28,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:06:29,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:06:29,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:06:29,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:06:29,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:06:29,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:06:29,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:06:29,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:06:29,087 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:06:29,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:06:29,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:06:29,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:06:29,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:06:29,090 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:06:29,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:06:29,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:06:29,091 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:06:29,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:06:29,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:06:29,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:06:29,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:06:29,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:06:29,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:06:29,099 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:06:29,099 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:06:29,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:06:29,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:06:29,100 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:06:29,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:06:29,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:06:29,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:06:29,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:06:29,100 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:06:29,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:06:29,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:06:29,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41cf9d90b654ba629ed26494b45977a61fd5035aced9f092d4e43a94133522bd [2024-11-16 19:06:29,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:06:29,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:06:29,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:06:29,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:06:29,301 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:06:29,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.i [2024-11-16 19:06:30,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:06:30,850 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:06:30,850 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.i [2024-11-16 19:06:30,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5efdc085f/6edfdc9c80dd418f9eca47e5d41ef582/FLAG9d482e2fd [2024-11-16 19:06:30,872 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5efdc085f/6edfdc9c80dd418f9eca47e5d41ef582 [2024-11-16 19:06:30,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:06:30,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:06:30,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:06:30,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:06:30,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:06:30,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:06:30" (1/1) ... [2024-11-16 19:06:30,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f8386e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:30, skipping insertion in model container [2024-11-16 19:06:30,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:06:30" (1/1) ... [2024-11-16 19:06:30,920 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:06:31,178 WARN L250 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-ext/09_fmaxsym-zero.i[30725,30738] [2024-11-16 19:06:31,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:06:31,197 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:06:31,227 WARN L250 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-ext/09_fmaxsym-zero.i[30725,30738] [2024-11-16 19:06:31,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:06:31,276 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:06:31,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31 WrapperNode [2024-11-16 19:06:31,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:06:31,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:06:31,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:06:31,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:06:31,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,328 INFO L138 Inliner]: procedures = 164, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-16 19:06:31,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:06:31,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:06:31,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:06:31,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:06:31,336 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,348 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 0 writes are split as follows [0, 0, 0]. [2024-11-16 19:06:31,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,352 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,354 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:06:31,357 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:06:31,357 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:06:31,357 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:06:31,358 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (1/1) ... [2024-11-16 19:06:31,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:06:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:06:31,388 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) [2024-11-16 19:06:31,394 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 [2024-11-16 19:06:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:06:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:06:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:06:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-16 19:06:31,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-16 19:06:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:06:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:06:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:06:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:06:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:06:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:06:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:06:31,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:06:31,430 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:06:31,535 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:06:31,541 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:06:31,699 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:06:31,700 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:06:31,804 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:06:31,805 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:06:31,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:06:31 BoogieIcfgContainer [2024-11-16 19:06:31,805 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:06:31,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:06:31,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:06:31,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:06:31,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:06:30" (1/3) ... [2024-11-16 19:06:31,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8c75d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:06:31, skipping insertion in model container [2024-11-16 19:06:31,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:06:31" (2/3) ... [2024-11-16 19:06:31,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8c75d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:06:31, skipping insertion in model container [2024-11-16 19:06:31,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:06:31" (3/3) ... [2024-11-16 19:06:31,811 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-zero.i [2024-11-16 19:06:31,822 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:06:31,822 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:06:31,822 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:06:31,858 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:06:31,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 24 transitions, 52 flow [2024-11-16 19:06:31,904 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-16 19:06:31,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:06:31,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 29 events. 5/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 4 conditions per place. [2024-11-16 19:06:31,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 24 transitions, 52 flow [2024-11-16 19:06:31,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 24 transitions, 52 flow [2024-11-16 19:06:31,926 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:06:31,934 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;@2222811a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:06:31,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:06:31,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:06:31,940 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-16 19:06:31,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:06:31,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:31,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:06:31,942 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 19:06:31,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1250152358, now seen corresponding path program 1 times [2024-11-16 19:06:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432298508] [2024-11-16 19:06:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:32,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:06:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:32,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:06:32,084 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:06:32,085 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-16 19:06:32,086 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-16 19:06:32,086 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-16 19:06:32,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:06:32,087 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:06:32,089 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:06:32,089 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:06:32,107 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:06:32,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 40 transitions, 90 flow [2024-11-16 19:06:32,127 INFO L124 PetriNetUnfolderBase]: 9/51 cut-off events. [2024-11-16 19:06:32,127 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:06:32,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 51 events. 9/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 36. Up to 6 conditions per place. [2024-11-16 19:06:32,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 40 transitions, 90 flow [2024-11-16 19:06:32,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 40 transitions, 90 flow [2024-11-16 19:06:32,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:06:32,134 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;@2222811a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:06:32,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:06:32,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:06:32,149 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-11-16 19:06:32,149 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:06:32,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:32,150 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:06:32,150 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-16 19:06:32,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 63238654, now seen corresponding path program 1 times [2024-11-16 19:06:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:32,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56767294] [2024-11-16 19:06:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:32,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:06:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:32,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:06:32,218 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:06:32,218 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-16 19:06:32,218 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-16 19:06:32,218 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-16 19:06:32,218 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:06:32,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:06:32,218 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:06:32,219 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:06:32,219 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:06:32,250 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:06:32,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 56 transitions, 130 flow [2024-11-16 19:06:32,273 INFO L124 PetriNetUnfolderBase]: 13/73 cut-off events. [2024-11-16 19:06:32,273 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:06:32,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 73 events. 13/73 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 58. Up to 8 conditions per place. [2024-11-16 19:06:32,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 56 transitions, 130 flow [2024-11-16 19:06:32,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 56 transitions, 130 flow [2024-11-16 19:06:32,278 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:06:32,279 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;@2222811a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:06:32,279 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:06:32,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:06:32,309 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2024-11-16 19:06:32,309 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:06:32,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:32,309 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:32,309 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:06:32,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1426993323, now seen corresponding path program 1 times [2024-11-16 19:06:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485157807] [2024-11-16 19:06:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485157807] [2024-11-16 19:06:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485157807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:06:32,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:06:32,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:06:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241448805] [2024-11-16 19:06:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:06:32,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:06:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:06:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:06:32,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-16 19:06:32,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-16 19:06:32,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:32,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-16 19:06:32,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:06:33,338 INFO L124 PetriNetUnfolderBase]: 5287/8733 cut-off events. [2024-11-16 19:06:33,338 INFO L125 PetriNetUnfolderBase]: For 499/499 co-relation queries the response was YES. [2024-11-16 19:06:33,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16315 conditions, 8733 events. 5287/8733 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 61488 event pairs, 2342 based on Foata normal form. 2014/10611 useless extension candidates. Maximal degree in co-relation 5094. Up to 4133 conditions per place. [2024-11-16 19:06:33,448 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 49 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2024-11-16 19:06:33,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 268 flow [2024-11-16 19:06:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:06:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:06:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-16 19:06:33,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-11-16 19:06:33,459 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 130 flow. Second operand 3 states and 115 transitions. [2024-11-16 19:06:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 268 flow [2024-11-16 19:06:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 264 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-16 19:06:33,465 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 123 flow [2024-11-16 19:06:33,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-16 19:06:33,468 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-11-16 19:06:33,468 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 123 flow [2024-11-16 19:06:33,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-16 19:06:33,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:33,469 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:06:33,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:06:33,469 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:06:33,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash -497990283, now seen corresponding path program 1 times [2024-11-16 19:06:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:33,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174110972] [2024-11-16 19:06:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:33,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:33,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:06:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:33,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:06:33,490 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:06:33,491 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-16 19:06:33,491 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-16 19:06:33,491 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-16 19:06:33,491 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-16 19:06:33,491 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-16 19:06:33,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:06:33,491 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:06:33,492 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:06:33,492 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:06:33,523 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:06:33,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 72 transitions, 172 flow [2024-11-16 19:06:33,532 INFO L124 PetriNetUnfolderBase]: 17/95 cut-off events. [2024-11-16 19:06:33,532 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:06:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 95 events. 17/95 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 85. Up to 10 conditions per place. [2024-11-16 19:06:33,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 72 transitions, 172 flow [2024-11-16 19:06:33,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 72 transitions, 172 flow [2024-11-16 19:06:33,534 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:06:33,535 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;@2222811a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:06:33,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:06:33,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:06:33,538 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2024-11-16 19:06:33,538 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:06:33,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:33,538 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:33,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:06:33,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1114319789, now seen corresponding path program 1 times [2024-11-16 19:06:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423227147] [2024-11-16 19:06:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:33,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:33,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423227147] [2024-11-16 19:06:33,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423227147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:06:33,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:06:33,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:06:33,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225979509] [2024-11-16 19:06:33,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:06:33,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:06:33,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:33,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:06:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:06:33,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-16 19:06:33,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-16 19:06:33,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:33,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-16 19:06:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:06:39,433 INFO L124 PetriNetUnfolderBase]: 58087/85786 cut-off events. [2024-11-16 19:06:39,434 INFO L125 PetriNetUnfolderBase]: For 7085/7085 co-relation queries the response was YES. [2024-11-16 19:06:39,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162873 conditions, 85786 events. 58087/85786 cut-off events. For 7085/7085 co-relation queries the response was YES. Maximal size of possible extension queue 3229. Compared 685696 event pairs, 26406 based on Foata normal form. 20062/104672 useless extension candidates. Maximal degree in co-relation 16291. Up to 41829 conditions per place. [2024-11-16 19:06:39,909 INFO L140 encePairwiseOnDemand]: 59/72 looper letters, 67 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2024-11-16 19:06:39,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 369 flow [2024-11-16 19:06:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:06:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:06:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-11-16 19:06:39,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-11-16 19:06:39,914 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 172 flow. Second operand 3 states and 152 transitions. [2024-11-16 19:06:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 369 flow [2024-11-16 19:06:39,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 357 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-16 19:06:39,925 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 157 flow [2024-11-16 19:06:39,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-16 19:06:39,929 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-16 19:06:39,930 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 157 flow [2024-11-16 19:06:39,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-16 19:06:39,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:39,930 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:39,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:06:39,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:06:39,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1829463050, now seen corresponding path program 1 times [2024-11-16 19:06:39,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:39,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429748699] [2024-11-16 19:06:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:06:40,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:40,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429748699] [2024-11-16 19:06:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429748699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:06:40,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:06:40,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:06:40,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785932892] [2024-11-16 19:06:40,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:06:40,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:06:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:06:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:06:40,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-16 19:06:40,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-16 19:06:40,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:40,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-16 19:06:40,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:06:45,373 INFO L124 PetriNetUnfolderBase]: 60055/87679 cut-off events. [2024-11-16 19:06:45,373 INFO L125 PetriNetUnfolderBase]: For 16660/16660 co-relation queries the response was YES. [2024-11-16 19:06:45,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179324 conditions, 87679 events. 60055/87679 cut-off events. For 16660/16660 co-relation queries the response was YES. Maximal size of possible extension queue 3302. Compared 687501 event pairs, 26415 based on Foata normal form. 0/86563 useless extension candidates. Maximal degree in co-relation 114583. Up to 42942 conditions per place. [2024-11-16 19:06:45,815 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 68 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2024-11-16 19:06:45,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 380 flow [2024-11-16 19:06:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:06:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:06:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-11-16 19:06:45,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-11-16 19:06:45,818 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 157 flow. Second operand 3 states and 131 transitions. [2024-11-16 19:06:45,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 380 flow [2024-11-16 19:06:45,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:06:45,835 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 167 flow [2024-11-16 19:06:45,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-16 19:06:45,836 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-16 19:06:45,837 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 167 flow [2024-11-16 19:06:45,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-16 19:06:45,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:45,838 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:45,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:06:45,838 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:06:45,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash -617263349, now seen corresponding path program 1 times [2024-11-16 19:06:45,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:45,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592768142] [2024-11-16 19:06:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:45,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:06:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:06:45,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:06:45,865 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:06:45,865 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-16 19:06:45,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-16 19:06:45,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-16 19:06:45,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-16 19:06:45,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-16 19:06:45,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-16 19:06:45,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:06:45,868 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:06:45,868 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:06:45,869 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-16 19:06:45,904 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:06:45,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 88 transitions, 216 flow [2024-11-16 19:06:45,913 INFO L124 PetriNetUnfolderBase]: 21/117 cut-off events. [2024-11-16 19:06:45,913 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-16 19:06:45,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 117 events. 21/117 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 286 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 113. Up to 12 conditions per place. [2024-11-16 19:06:45,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 88 transitions, 216 flow [2024-11-16 19:06:45,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 88 transitions, 216 flow [2024-11-16 19:06:45,916 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:06:45,917 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;@2222811a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:06:45,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-16 19:06:45,919 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:06:45,919 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2024-11-16 19:06:45,919 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:06:45,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:45,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:45,919 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-16 19:06:45,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1425210093, now seen corresponding path program 1 times [2024-11-16 19:06:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:45,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396500000] [2024-11-16 19:06:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:45,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:45,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396500000] [2024-11-16 19:06:45,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396500000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:06:45,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:06:45,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:06:45,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213797998] [2024-11-16 19:06:45,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:06:45,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:06:45,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:45,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:06:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:06:45,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2024-11-16 19:06:45,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:06:45,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2024-11-16 19:06:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand