./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.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 f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:07:08,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:07:08,911 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:07:08,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:07:08,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:07:08,938 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:07:08,939 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:07:08,939 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:07:08,939 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:07:08,940 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:07:08,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:07:08,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:07:08,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:07:08,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:07:08,941 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:07:08,942 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:07:08,942 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:07:08,942 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:07:08,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:07:08,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:07:08,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:07:08,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:07:08,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:07:08,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:07:08,944 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:07:08,945 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:07:08,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:07:08,945 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:07:08,946 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:07:08,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:07:08,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:07:08,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:07:08,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:08,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:07:08,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:07:08,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:07:08,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:07:08,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:07:08,948 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:07:08,949 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:07:08,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:07:08,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:07:08,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e [2024-11-16 19:07:09,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:07:09,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:07:09,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:07:09,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:07:09,191 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:07:09,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2024-11-16 19:07:10,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:07:10,681 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:07:10,681 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2024-11-16 19:07:10,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44740f9af/0a7e8c297e54491b8f4c139c99dcd022/FLAG14fad9f79 [2024-11-16 19:07:10,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44740f9af/0a7e8c297e54491b8f4c139c99dcd022 [2024-11-16 19:07:10,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:07:10,708 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:07:10,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:10,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:07:10,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:07:10,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:10" (1/1) ... [2024-11-16 19:07:10,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1814978e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:10, skipping insertion in model container [2024-11-16 19:07:10,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:10" (1/1) ... [2024-11-16 19:07:10,741 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:07:10,995 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/26_stack_cas_longer-2.i[31305,31318] [2024-11-16 19:07:11,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:11,025 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:07:11,054 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/26_stack_cas_longer-2.i[31305,31318] [2024-11-16 19:07:11,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:11,136 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:07:11,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11 WrapperNode [2024-11-16 19:07:11,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:11,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:11,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:07:11,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:07:11,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,191 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 825 [2024-11-16 19:07:11,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:11,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:07:11,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:07:11,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:07:11,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,210 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,239 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 12, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 1, 1]. The 9 writes are split as follows [0, 5, 2, 2]. [2024-11-16 19:07:11,239 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,239 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,258 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:07:11,273 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:07:11,273 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:07:11,273 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:07:11,274 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (1/1) ... [2024-11-16 19:07:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:07:11,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:07:11,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:07:11,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:07:11,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:07:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:07:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:07:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-16 19:07:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-16 19:07:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:07:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:07:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:07:11,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:07:11,362 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:07:11,518 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:07:11,520 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:07:12,121 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:07:12,121 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:07:29,061 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:07:29,064 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:07:29,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:29 BoogieIcfgContainer [2024-11-16 19:07:29,064 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:07:29,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:07:29,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:07:29,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:07:29,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:07:10" (1/3) ... [2024-11-16 19:07:29,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e6df91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:29, skipping insertion in model container [2024-11-16 19:07:29,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:11" (2/3) ... [2024-11-16 19:07:29,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e6df91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:29, skipping insertion in model container [2024-11-16 19:07:29,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:29" (3/3) ... [2024-11-16 19:07:29,072 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2024-11-16 19:07:29,086 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:07:29,087 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:07:29,087 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:07:29,213 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:29,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 45 transitions, 94 flow [2024-11-16 19:07:29,329 INFO L124 PetriNetUnfolderBase]: 10/50 cut-off events. [2024-11-16 19:07:29,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:29,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 50 events. 10/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2024-11-16 19:07:29,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 45 transitions, 94 flow [2024-11-16 19:07:29,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 45 transitions, 94 flow [2024-11-16 19:07:29,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:29,351 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;@35cbdf91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:29,353 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:07:29,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:29,407 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-11-16 19:07:29,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:29,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:29,408 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:07:29,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 19:07:29,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash 828161322, now seen corresponding path program 1 times [2024-11-16 19:07:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:29,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72727418] [2024-11-16 19:07:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms