./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-ext/35_double_lock_p3_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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-ext/35_double_lock_p3_vs-pthread.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 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 06:51:57,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 06:51:57,881 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 06:51:57,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 06:51:57,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 06:51:57,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 06:51:57,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 06:51:57,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 06:51:57,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 06:51:57,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 06:51:57,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 06:51:57,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 06:51:57,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 06:51:57,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 06:51:57,936 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 06:51:57,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 06:51:57,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 06:51:57,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 06:51:57,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 06:51:57,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 06:51:57,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 06:51:57,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 06:51:57,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 06:51:57,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 06:51:57,944 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 06:51:57,945 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 06:51:57,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 06:51:57,945 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 06:51:57,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 06:51:57,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 06:51:57,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 06:51:57,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 06:51:57,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:51:57,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 06:51:57,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 06:51:57,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 06:51:57,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 06:51:57,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 06:51:57,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 06:51:57,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 06:51:57,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 06:51:57,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 06:51:57,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 [2024-10-13 06:51:58,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 06:51:58,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 06:51:58,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 06:51:58,258 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 06:51:58,258 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 06:51:58,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-10-13 06:51:59,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 06:52:00,019 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 06:52:00,020 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-10-13 06:52:00,035 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4faee9b0c/7c242f108f4d47cfaf7f7b6701369853/FLAG922a1269f [2024-10-13 06:52:00,325 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4faee9b0c/7c242f108f4d47cfaf7f7b6701369853 [2024-10-13 06:52:00,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 06:52:00,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 06:52:00,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 06:52:00,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 06:52:00,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 06:52:00,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c4a130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00, skipping insertion in model container [2024-10-13 06:52:00,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 06:52:00,740 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-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2024-10-13 06:52:00,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:52:00,764 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 06:52:00,807 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-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2024-10-13 06:52:00,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:52:00,846 INFO L204 MainTranslator]: Completed translation [2024-10-13 06:52:00,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00 WrapperNode [2024-10-13 06:52:00,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 06:52:00,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 06:52:00,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 06:52:00,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 06:52:00,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,899 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-10-13 06:52:00,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 06:52:00,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 06:52:00,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 06:52:00,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 06:52:00,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,930 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-10-13 06:52:00,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 06:52:00,944 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 06:52:00,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 06:52:00,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 06:52:00,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (1/1) ... [2024-10-13 06:52:00,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:52:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:52:00,982 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) [2024-10-13 06:52:00,984 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 [2024-10-13 06:52:01,033 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-13 06:52:01,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-13 06:52:01,034 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 06:52:01,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 06:52:01,034 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 06:52:01,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 06:52:01,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 06:52:01,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 06:52:01,036 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 06:52:01,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 06:52:01,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 06:52:01,037 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 06:52:01,157 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 06:52:01,159 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 06:52:01,288 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 06:52:01,288 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 06:52:01,399 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 06:52:01,399 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 06:52:01,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:01 BoogieIcfgContainer [2024-10-13 06:52:01,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 06:52:01,402 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 06:52:01,402 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 06:52:01,409 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 06:52:01,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:00" (1/3) ... [2024-10-13 06:52:01,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2428ad3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:01, skipping insertion in model container [2024-10-13 06:52:01,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:00" (2/3) ... [2024-10-13 06:52:01,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2428ad3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:01, skipping insertion in model container [2024-10-13 06:52:01,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:01" (3/3) ... [2024-10-13 06:52:01,413 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2024-10-13 06:52:01,432 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 06:52:01,432 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 06:52:01,432 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 06:52:01,483 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:01,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 72 flow [2024-10-13 06:52:01,551 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-10-13 06:52:01,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:52:01,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 3/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 67 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-10-13 06:52:01,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 32 transitions, 72 flow [2024-10-13 06:52:01,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 69 flow [2024-10-13 06:52:01,572 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:01,579 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;@2de6178c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:01,579 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 06:52:01,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:01,588 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-10-13 06:52:01,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:52:01,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:01,592 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:01,593 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 06:52:01,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1240349652, now seen corresponding path program 1 times [2024-10-13 06:52:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:01,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708633698] [2024-10-13 06:52:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:01,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:01,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:01,847 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:01,848 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-13 06:52:01,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-13 06:52:01,851 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-10-13 06:52:01,851 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-13 06:52:01,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 06:52:01,852 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 06:52:01,857 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:01,858 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 06:52:01,945 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:01,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 134 flow [2024-10-13 06:52:01,972 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2024-10-13 06:52:01,974 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:52:01,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 49 events. 4/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 56. Up to 3 conditions per place. [2024-10-13 06:52:01,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 134 flow [2024-10-13 06:52:01,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 101 flow [2024-10-13 06:52:01,978 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:01,980 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;@2de6178c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:01,980 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 06:52:01,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:01,989 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-13 06:52:01,989 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:01,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:01,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:01,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:52:01,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash -409590917, now seen corresponding path program 1 times [2024-10-13 06:52:01,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989541833] [2024-10-13 06:52:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989541833] [2024-10-13 06:52:02,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989541833] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:02,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:02,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381000515] [2024-10-13 06:52:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:02,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:02,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:02,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-10-13 06:52:02,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-13 06:52:02,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:02,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-10-13 06:52:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:02,824 INFO L124 PetriNetUnfolderBase]: 2714/4054 cut-off events. [2024-10-13 06:52:02,824 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-13 06:52:02,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4054 events. 2714/4054 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23209 event pairs, 2506 based on Foata normal form. 797/4614 useless extension candidates. Maximal degree in co-relation 8066. Up to 3911 conditions per place. [2024-10-13 06:52:02,864 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 30 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2024-10-13 06:52:02,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 153 flow [2024-10-13 06:52:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-10-13 06:52:02,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2024-10-13 06:52:02,880 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 101 flow. Second operand 3 states and 82 transitions. [2024-10-13 06:52:02,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 153 flow [2024-10-13 06:52:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:02,889 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 92 flow [2024-10-13 06:52:02,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-13 06:52:02,896 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2024-10-13 06:52:02,897 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 92 flow [2024-10-13 06:52:02,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-13 06:52:02,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:02,898 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:02,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 06:52:02,899 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:52:02,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -443557731, now seen corresponding path program 1 times [2024-10-13 06:52:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:02,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383324533] [2024-10-13 06:52:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:02,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:02,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:02,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:02,977 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:02,977 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-13 06:52:02,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-13 06:52:02,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-10-13 06:52:02,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-13 06:52:02,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-13 06:52:02,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 06:52:02,979 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 06:52:02,980 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:02,980 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 06:52:03,026 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:03,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 82 transitions, 200 flow [2024-10-13 06:52:03,044 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2024-10-13 06:52:03,044 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 06:52:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 65 events. 5/65 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 173 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2024-10-13 06:52:03,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 82 transitions, 200 flow [2024-10-13 06:52:03,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 135 flow [2024-10-13 06:52:03,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:03,050 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;@2de6178c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:03,051 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-13 06:52:03,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:03,055 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-13 06:52:03,055 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:03,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:03,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:03,056 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:03,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash -835658957, now seen corresponding path program 1 times [2024-10-13 06:52:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462310267] [2024-10-13 06:52:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:03,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:03,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462310267] [2024-10-13 06:52:03,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462310267] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:03,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:03,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861175962] [2024-10-13 06:52:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:03,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:03,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 82 [2024-10-13 06:52:03,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-13 06:52:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 82 [2024-10-13 06:52:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:08,855 INFO L124 PetriNetUnfolderBase]: 43007/57637 cut-off events. [2024-10-13 06:52:08,856 INFO L125 PetriNetUnfolderBase]: For 2553/2553 co-relation queries the response was YES. [2024-10-13 06:52:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115385 conditions, 57637 events. 43007/57637 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 366393 event pairs, 39532 based on Foata normal form. 8782/62605 useless extension candidates. Maximal degree in co-relation 115373. Up to 56183 conditions per place. [2024-10-13 06:52:09,551 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 42 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2024-10-13 06:52:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 211 flow [2024-10-13 06:52:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-10-13 06:52:09,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-10-13 06:52:09,556 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 135 flow. Second operand 3 states and 115 transitions. [2024-10-13 06:52:09,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 211 flow [2024-10-13 06:52:09,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:09,564 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 124 flow [2024-10-13 06:52:09,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-10-13 06:52:09,566 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-13 06:52:09,566 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 124 flow [2024-10-13 06:52:09,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-13 06:52:09,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:09,569 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:09,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 06:52:09,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:09,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -616763677, now seen corresponding path program 1 times [2024-10-13 06:52:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413995049] [2024-10-13 06:52:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:09,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:09,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:09,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:09,618 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:09,618 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-13 06:52:09,618 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-13 06:52:09,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-13 06:52:09,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-13 06:52:09,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-13 06:52:09,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-13 06:52:09,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 06:52:09,620 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 06:52:09,621 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:09,621 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 06:52:09,670 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:09,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 270 flow [2024-10-13 06:52:09,689 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2024-10-13 06:52:09,689 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 06:52:09,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 81 events. 6/81 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2024-10-13 06:52:09,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 270 flow [2024-10-13 06:52:09,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 171 flow [2024-10-13 06:52:09,693 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:09,694 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;@2de6178c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:09,695 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-13 06:52:09,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:09,698 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-13 06:52:09,698 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:09,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:09,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:09,699 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:09,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1136618379, now seen corresponding path program 1 times [2024-10-13 06:52:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72665147] [2024-10-13 06:52:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:09,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:09,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72665147] [2024-10-13 06:52:09,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72665147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:09,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11911475] [2024-10-13 06:52:09,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:09,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:09,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 107 [2024-10-13 06:52:09,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-13 06:52:09,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:09,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 107 [2024-10-13 06:52:09,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand