./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/04_incdec_cas.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 a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:24:29,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:24:29,496 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:24:29,501 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:24:29,502 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:24:29,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:24:29,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:24:29,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:24:29,534 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:24:29,536 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:24:29,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:24:29,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:24:29,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:24:29,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:24:29,539 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:24:29,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:24:29,540 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:24:29,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:24:29,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:24:29,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:24:29,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:24:29,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:24:29,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:24:29,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:24:29,544 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:24:29,544 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:24:29,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:24:29,545 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:24:29,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:24:29,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:24:29,546 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:24:29,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:24:29,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:24:29,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:24:29,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:24:29,547 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:24:29,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:24:29,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:24:29,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:24:29,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:24:29,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:24:29,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:24:29,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2024-11-09 02:24:29,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:24:29,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:24:29,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:24:29,894 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:24:29,894 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:24:29,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2024-11-09 02:24:31,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:24:31,584 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:24:31,584 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2024-11-09 02:24:31,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8f119769/fc97f09cda234904bc7c035a587e7c0a/FLAGcbbd9760a [2024-11-09 02:24:31,924 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8f119769/fc97f09cda234904bc7c035a587e7c0a [2024-11-09 02:24:31,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:24:31,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:24:31,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:24:31,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:24:31,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:24:31,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:24:31" (1/1) ... [2024-11-09 02:24:31,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748cecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:31, skipping insertion in model container [2024-11-09 02:24:31,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:24:31" (1/1) ... [2024-11-09 02:24:31,986 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:24:32,358 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/04_incdec_cas.i[30369,30382] [2024-11-09 02:24:32,372 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/04_incdec_cas.i[30869,30882] [2024-11-09 02:24:32,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:24:32,392 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:24:32,442 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/04_incdec_cas.i[30369,30382] [2024-11-09 02:24:32,448 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/04_incdec_cas.i[30869,30882] [2024-11-09 02:24:32,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:24:32,499 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:24:32,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32 WrapperNode [2024-11-09 02:24:32,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:24:32,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:24:32,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:24:32,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:24:32,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,552 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 160 [2024-11-09 02:24:32,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:24:32,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:24:32,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:24:32,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:24:32,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,594 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 6, 6, 9]. 39 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 2, 0, 1]. The 8 writes are split as follows [0, 2, 4, 2]. [2024-11-09 02:24:32,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:24:32,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:24:32,619 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:24:32,619 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:24:32,620 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (1/1) ... [2024-11-09 02:24:32,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:24:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:32,697 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) [2024-11-09 02:24:32,699 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 [2024-11-09 02:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 02:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-09 02:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-09 02:24:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-09 02:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 02:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-09 02:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 02:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:24:32,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:24:32,747 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:24:32,874 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:24:32,876 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:24:33,165 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:24:33,165 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:24:33,385 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:24:33,385 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:24:33,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:24:33 BoogieIcfgContainer [2024-11-09 02:24:33,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:24:33,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:24:33,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:24:33,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:24:33,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:24:31" (1/3) ... [2024-11-09 02:24:33,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb49d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:24:33, skipping insertion in model container [2024-11-09 02:24:33,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:32" (2/3) ... [2024-11-09 02:24:33,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb49d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:24:33, skipping insertion in model container [2024-11-09 02:24:33,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:24:33" (3/3) ... [2024-11-09 02:24:33,398 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2024-11-09 02:24:33,414 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:24:33,414 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 02:24:33,414 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:24:33,483 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:33,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 34 transitions, 72 flow [2024-11-09 02:24:33,545 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-09 02:24:33,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:33,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 92 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-11-09 02:24:33,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 34 transitions, 72 flow [2024-11-09 02:24:33,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 34 transitions, 72 flow [2024-11-09 02:24:33,568 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:33,576 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;@3a627244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:33,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-09 02:24:33,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:33,588 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2024-11-09 02:24:33,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:33,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:33,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 02:24:33,590 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-09 02:24:33,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 193801489, now seen corresponding path program 1 times [2024-11-09 02:24:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:33,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345469656] [2024-11-09 02:24:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:33,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:33,732 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:24:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:33,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:24:33,788 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:24:33,790 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-09 02:24:33,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-09 02:24:33,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-09 02:24:33,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-09 02:24:33,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-09 02:24:33,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:24:33,794 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-09 02:24:33,800 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:24:33,800 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 02:24:33,907 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:33,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 136 flow [2024-11-09 02:24:33,935 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2024-11-09 02:24:33,936 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:24:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-11-09 02:24:33,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 136 flow [2024-11-09 02:24:33,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 63 transitions, 136 flow [2024-11-09 02:24:33,941 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:33,943 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;@3a627244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:33,944 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-09 02:24:33,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:33,949 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2024-11-09 02:24:33,950 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 02:24:33,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:33,950 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:33,951 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 02:24:33,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash -612884550, now seen corresponding path program 1 times [2024-11-09 02:24:33,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:33,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495546818] [2024-11-09 02:24:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:33,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:24:34,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495546818] [2024-11-09 02:24:34,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495546818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:34,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:34,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:34,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250542695] [2024-11-09 02:24:34,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:34,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 02:24:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 02:24:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 02:24:34,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 63 [2024-11-09 02:24:34,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:24:34,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:34,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 63 [2024-11-09 02:24:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:34,766 INFO L124 PetriNetUnfolderBase]: 2553/3945 cut-off events. [2024-11-09 02:24:34,766 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-09 02:24:34,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 3945 events. 2553/3945 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20139 event pairs, 1938 based on Foata normal form. 0/3048 useless extension candidates. Maximal degree in co-relation 3620. Up to 3816 conditions per place. [2024-11-09 02:24:34,798 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 53 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2024-11-09 02:24:34,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 232 flow [2024-11-09 02:24:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 02:24:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 02:24:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2024-11-09 02:24:34,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-11-09 02:24:34,813 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 136 flow. Second operand 2 states and 68 transitions. [2024-11-09 02:24:34,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 232 flow [2024-11-09 02:24:34,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:34,823 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 126 flow [2024-11-09 02:24:34,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2024-11-09 02:24:34,832 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-11-09 02:24:34,832 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 126 flow [2024-11-09 02:24:34,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:24:34,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:34,833 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-09 02:24:34,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:24:34,834 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 02:24:34,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1944964461, now seen corresponding path program 1 times [2024-11-09 02:24:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:34,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383601386] [2024-11-09 02:24:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:34,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:24:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:34,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:24:34,884 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:24:34,884 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-09 02:24:34,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-09 02:24:34,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-09 02:24:34,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-09 02:24:34,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-09 02:24:34,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-09 02:24:34,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-09 02:24:34,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:24:34,886 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-09 02:24:34,887 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:24:34,887 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-09 02:24:34,963 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:34,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 92 transitions, 202 flow [2024-11-09 02:24:34,976 INFO L124 PetriNetUnfolderBase]: 21/100 cut-off events. [2024-11-09 02:24:34,977 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 02:24:34,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 21/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 359 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2024-11-09 02:24:34,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 92 transitions, 202 flow [2024-11-09 02:24:34,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 92 transitions, 202 flow [2024-11-09 02:24:34,981 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:34,982 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;@3a627244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:34,982 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-09 02:24:34,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:34,985 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-11-09 02:24:34,985 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 02:24:34,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:34,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:34,986 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-09 02:24:34,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2114355278, now seen corresponding path program 1 times [2024-11-09 02:24:34,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842044989] [2024-11-09 02:24:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:34,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:24:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842044989] [2024-11-09 02:24:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842044989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:35,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111127463] [2024-11-09 02:24:35,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:35,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 02:24:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 02:24:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 02:24:35,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2024-11-09 02:24:35,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2024-11-09 02:24:35,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:35,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2024-11-09 02:24:35,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:44,321 INFO L124 PetriNetUnfolderBase]: 81353/109105 cut-off events. [2024-11-09 02:24:44,321 INFO L125 PetriNetUnfolderBase]: For 2624/2624 co-relation queries the response was YES. [2024-11-09 02:24:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217387 conditions, 109105 events. 81353/109105 cut-off events. For 2624/2624 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 666610 event pairs, 62738 based on Foata normal form. 0/82232 useless extension candidates. Maximal degree in co-relation 14436. Up to 106616 conditions per place. [2024-11-09 02:24:45,161 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 78 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2024-11-09 02:24:45,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 344 flow [2024-11-09 02:24:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 02:24:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 02:24:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 99 transitions. [2024-11-09 02:24:45,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-11-09 02:24:45,165 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 202 flow. Second operand 2 states and 99 transitions. [2024-11-09 02:24:45,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 344 flow [2024-11-09 02:24:45,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:45,174 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 186 flow [2024-11-09 02:24:45,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-11-09 02:24:45,176 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-09 02:24:45,177 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 186 flow [2024-11-09 02:24:45,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2024-11-09 02:24:45,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:45,178 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:45,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 02:24:45,180 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-09 02:24:45,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -404728889, now seen corresponding path program 1 times [2024-11-09 02:24:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:45,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418902521] [2024-11-09 02:24:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:45,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:24:45,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:45,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418902521] [2024-11-09 02:24:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418902521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:24:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930373719] [2024-11-09 02:24:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:45,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:24:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:24:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:24:45,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2024-11-09 02:24:45,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-09 02:24:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2024-11-09 02:24:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:55,050 INFO L124 PetriNetUnfolderBase]: 103794/141004 cut-off events. [2024-11-09 02:24:55,051 INFO L125 PetriNetUnfolderBase]: For 1791/1791 co-relation queries the response was YES. [2024-11-09 02:24:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279230 conditions, 141004 events. 103794/141004 cut-off events. For 1791/1791 co-relation queries the response was YES. Maximal size of possible extension queue 4170. Compared 922832 event pairs, 23278 based on Foata normal form. 0/109801 useless extension candidates. Maximal degree in co-relation 279224. Up to 108783 conditions per place. [2024-11-09 02:24:55,911 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 194 selfloop transitions, 13 changer transitions 0/214 dead transitions. [2024-11-09 02:24:55,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 214 transitions, 883 flow [2024-11-09 02:24:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:24:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:24:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-11-09 02:24:55,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-11-09 02:24:55,916 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 186 flow. Second operand 5 states and 244 transitions. [2024-11-09 02:24:55,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 214 transitions, 883 flow [2024-11-09 02:24:55,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 214 transitions, 883 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:55,929 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 281 flow [2024-11-09 02:24:55,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-11-09 02:24:55,931 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-09 02:24:55,933 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 281 flow [2024-11-09 02:24:55,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-09 02:24:55,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:55,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:55,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 02:24:55,934 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-09 02:24:55,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash 543818539, now seen corresponding path program 1 times [2024-11-09 02:24:55,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:55,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563034860] [2024-11-09 02:24:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:55,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:24:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563034860] [2024-11-09 02:24:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563034860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:56,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 02:24:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699297633] [2024-11-09 02:24:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:56,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 02:24:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 02:24:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-09 02:24:56,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 92 [2024-11-09 02:24:56,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-11-09 02:24:56,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:56,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 92 [2024-11-09 02:24:56,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:25:13,349 INFO L124 PetriNetUnfolderBase]: 169328/227579 cut-off events. [2024-11-09 02:25:13,349 INFO L125 PetriNetUnfolderBase]: For 36603/36603 co-relation queries the response was YES. [2024-11-09 02:25:13,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488599 conditions, 227579 events. 169328/227579 cut-off events. For 36603/36603 co-relation queries the response was YES. Maximal size of possible extension queue 6881. Compared 1541567 event pairs, 27226 based on Foata normal form. 0/179786 useless extension candidates. Maximal degree in co-relation 488589. Up to 127448 conditions per place. [2024-11-09 02:25:14,808 INFO L140 encePairwiseOnDemand]: 78/92 looper letters, 425 selfloop transitions, 42 changer transitions 0/473 dead transitions. [2024-11-09 02:25:14,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 473 transitions, 2133 flow [2024-11-09 02:25:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 02:25:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 02:25:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 525 transitions. [2024-11-09 02:25:14,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-11-09 02:25:14,813 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 281 flow. Second operand 10 states and 525 transitions. [2024-11-09 02:25:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 473 transitions, 2133 flow [2024-11-09 02:25:14,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 473 transitions, 2133 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:25:14,875 INFO L231 Difference]: Finished difference. Result has 100 places, 129 transitions, 601 flow [2024-11-09 02:25:14,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=601, PETRI_PLACES=100, PETRI_TRANSITIONS=129} [2024-11-09 02:25:14,876 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2024-11-09 02:25:14,876 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 129 transitions, 601 flow [2024-11-09 02:25:14,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-11-09 02:25:14,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:25:14,877 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-09 02:25:14,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 02:25:14,877 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-09 02:25:14,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:25:14,878 INFO L85 PathProgramCache]: Analyzing trace with hash 232682064, now seen corresponding path program 1 times [2024-11-09 02:25:14,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:25:14,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288174114] [2024-11-09 02:25:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:25:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:25:14,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:25:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:25:14,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:25:14,902 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:25:14,902 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-11-09 02:25:14,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2024-11-09 02:25:14,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-11-09 02:25:14,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2024-11-09 02:25:14,903 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-11-09 02:25:14,903 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2024-11-09 02:25:14,903 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-11-09 02:25:14,906 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2024-11-09 02:25:14,906 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-11-09 02:25:14,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 02:25:14,906 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-09 02:25:14,907 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:25:14,907 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-09 02:25:14,989 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:25:14,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 121 transitions, 270 flow [2024-11-09 02:25:15,005 INFO L124 PetriNetUnfolderBase]: 28/132 cut-off events. [2024-11-09 02:25:15,005 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 02:25:15,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 28/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 504 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2024-11-09 02:25:15,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 121 transitions, 270 flow [2024-11-09 02:25:15,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 121 transitions, 270 flow [2024-11-09 02:25:15,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:25:15,010 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;@3a627244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:25:15,013 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-09 02:25:15,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:25:15,015 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-11-09 02:25:15,016 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 02:25:15,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:25:15,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:25:15,016 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-09 02:25:15,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:25:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1505726439, now seen corresponding path program 1 times [2024-11-09 02:25:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:25:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121946111] [2024-11-09 02:25:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:25:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:25:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:25:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121946111] [2024-11-09 02:25:15,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121946111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:25:15,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:25:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:25:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526401880] [2024-11-09 02:25:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:25:15,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 02:25:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:25:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 02:25:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 02:25:15,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 121 [2024-11-09 02:25:15,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 270 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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) [2024-11-09 02:25:15,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:25:15,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 121 [2024-11-09 02:25:15,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand