./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.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/36_stack_cas_p0_vs_concur.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 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:07:33,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:07:33,212 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:07:33,217 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:07:33,217 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:07:33,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:07:33,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:07:33,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:07:33,244 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:07:33,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:07:33,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:07:33,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:07:33,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:07:33,248 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:07:33,248 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:07:33,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:07:33,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:07:33,249 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:07:33,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:07:33,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:07:33,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:07:33,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:07:33,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:07:33,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:07:33,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:07:33,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:07:33,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:07:33,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:07:33,254 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:07:33,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:07:33,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:07:33,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:07:33,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:33,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:07:33,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:07:33,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:07:33,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:07:33,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:07:33,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:07:33,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:07:33,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:07:33,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:07:33,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 [2024-11-16 19:07:33,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:07:33,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:07:33,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:07:33,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:07:33,574 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:07:33,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-11-16 19:07:35,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:07:35,243 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:07:35,244 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-11-16 19:07:35,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bc061192/8cb753ff4baf42b99008032a2af22e89/FLAG3f2c4209e [2024-11-16 19:07:35,271 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bc061192/8cb753ff4baf42b99008032a2af22e89 [2024-11-16 19:07:35,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:07:35,274 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:07:35,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:35,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:07:35,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:07:35,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77921ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35, skipping insertion in model container [2024-11-16 19:07:35,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,323 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:07:35,723 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/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-11-16 19:07:35,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:35,743 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:07:35,782 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/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-11-16 19:07:35,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:35,835 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:07:35,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35 WrapperNode [2024-11-16 19:07:35,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:35,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:35,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:07:35,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:07:35,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,889 INFO L138 Inliner]: procedures = 172, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2024-11-16 19:07:35,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:35,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:07:35,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:07:35,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:07:35,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,906 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,939 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [6, 5, 3, 2]. 38 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [0, 1, 0, 2]. The 5 writes are split as follows [2, 1, 2, 0]. [2024-11-16 19:07:35,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,949 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:07:35,965 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:07:35,965 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:07:35,965 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:07:35,966 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (1/1) ... [2024-11-16 19:07:35,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:07:36,005 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 19:07:36,011 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 19:07:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:07:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:07:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:07:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:07:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-16 19:07:36,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-16 19:07:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:07:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:07:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:07:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:07:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:07:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:07:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:07:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:07:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:07:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:07:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:07:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:07:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:07:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:07:36,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:07:36,059 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 19:07:36,249 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:07:36,251 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:07:36,490 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:07:36,490 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:07:37,026 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:07:37,027 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:07:37,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:37 BoogieIcfgContainer [2024-11-16 19:07:37,027 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:07:37,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:07:37,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:07:37,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:07:37,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:07:35" (1/3) ... [2024-11-16 19:07:37,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5339af51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:37, skipping insertion in model container [2024-11-16 19:07:37,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:35" (2/3) ... [2024-11-16 19:07:37,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5339af51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:37, skipping insertion in model container [2024-11-16 19:07:37,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:37" (3/3) ... [2024-11-16 19:07:37,035 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2024-11-16 19:07:37,051 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:07:37,051 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:07:37,052 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:07:37,096 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:37,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 31 transitions, 66 flow [2024-11-16 19:07:37,165 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-16 19:07:37,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:37,169 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 4. Compared 48 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2024-11-16 19:07:37,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 31 transitions, 66 flow [2024-11-16 19:07:37,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 31 transitions, 66 flow [2024-11-16 19:07:37,184 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:37,190 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;@4b289b73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:37,191 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:07:37,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:37,200 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-16 19:07:37,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:37,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:37,201 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:07:37,202 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 19:07:37,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1062046880, now seen corresponding path program 1 times [2024-11-16 19:07:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:37,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949113461] [2024-11-16 19:07:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:37,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:37,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:37,932 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:37,935 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-16 19:07:37,936 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-16 19:07:37,937 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-16 19:07:37,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:07:37,938 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:07:37,941 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:37,941 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:07:37,981 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:37,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 54 transitions, 118 flow [2024-11-16 19:07:38,030 INFO L124 PetriNetUnfolderBase]: 13/65 cut-off events. [2024-11-16 19:07:38,031 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:07:38,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 13/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 139 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 50. Up to 6 conditions per place. [2024-11-16 19:07:38,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 54 transitions, 118 flow [2024-11-16 19:07:38,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 54 transitions, 118 flow [2024-11-16 19:07:38,038 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:38,040 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;@4b289b73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:38,040 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:07:38,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:38,058 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2024-11-16 19:07:38,058 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:07:38,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:38,059 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:07:38,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-16 19:07:38,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1790592690, now seen corresponding path program 1 times [2024-11-16 19:07:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424828440] [2024-11-16 19:07:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:38,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:38,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:38,609 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:38,609 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-16 19:07:38,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-16 19:07:38,610 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-16 19:07:38,610 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:07:38,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:07:38,610 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:07:38,612 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:38,612 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:07:38,663 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:38,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 77 transitions, 172 flow [2024-11-16 19:07:38,694 INFO L124 PetriNetUnfolderBase]: 19/94 cut-off events. [2024-11-16 19:07:38,695 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:07:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 19/94 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 72. Up to 8 conditions per place. [2024-11-16 19:07:38,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 77 transitions, 172 flow [2024-11-16 19:07:38,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 77 transitions, 172 flow [2024-11-16 19:07:38,701 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:38,703 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;@4b289b73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:38,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:07:38,716 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:38,717 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-11-16 19:07:38,717 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:07:38,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:38,717 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:38,717 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:07:38,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:38,718 INFO L85 PathProgramCache]: Analyzing trace with hash -544609285, now seen corresponding path program 1 times [2024-11-16 19:07:38,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:38,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304884870] [2024-11-16 19:07:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304884870] [2024-11-16 19:07:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304884870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:38,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:38,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409301] [2024-11-16 19:07:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:38,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:07:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:39,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:07:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:07:39,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2024-11-16 19:07:39,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 172 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 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) [2024-11-16 19:07:39,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:39,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2024-11-16 19:07:39,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:41,688 INFO L124 PetriNetUnfolderBase]: 16061/22989 cut-off events. [2024-11-16 19:07:41,689 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2024-11-16 19:07:41,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45310 conditions, 22989 events. 16061/22989 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 136116 event pairs, 13319 based on Foata normal form. 7275/27341 useless extension candidates. Maximal degree in co-relation 25777. Up to 21703 conditions per place. [2024-11-16 19:07:41,854 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 42 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2024-11-16 19:07:41,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 214 flow [2024-11-16 19:07:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:07:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:07:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2024-11-16 19:07:41,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-16 19:07:41,867 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 172 flow. Second operand 2 states and 84 transitions. [2024-11-16 19:07:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 214 flow [2024-11-16 19:07:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 212 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:07:41,873 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 128 flow [2024-11-16 19:07:41,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-11-16 19:07:41,878 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-11-16 19:07:41,879 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 128 flow [2024-11-16 19:07:41,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 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) [2024-11-16 19:07:41,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:41,879 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:07:41,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:07:41,879 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:07:41,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1174206377, now seen corresponding path program 1 times [2024-11-16 19:07:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:41,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556231534] [2024-11-16 19:07:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:41,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:42,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:42,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:42,196 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:42,197 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-16 19:07:42,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-16 19:07:42,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-16 19:07:42,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-16 19:07:42,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-16 19:07:42,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:07:42,198 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:07:42,199 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:42,199 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:07:42,250 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:42,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 100 transitions, 228 flow [2024-11-16 19:07:42,280 INFO L124 PetriNetUnfolderBase]: 25/123 cut-off events. [2024-11-16 19:07:42,281 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:07:42,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 123 events. 25/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2024-11-16 19:07:42,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 100 transitions, 228 flow [2024-11-16 19:07:42,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 100 transitions, 228 flow [2024-11-16 19:07:42,285 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:42,286 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;@4b289b73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:42,286 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:07:42,294 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:42,294 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2024-11-16 19:07:42,294 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:07:42,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:42,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:42,295 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:07:42,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash -684257505, now seen corresponding path program 1 times [2024-11-16 19:07:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889407172] [2024-11-16 19:07:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889407172] [2024-11-16 19:07:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889407172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123013484] [2024-11-16 19:07:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:42,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:07:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:07:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:07:42,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 100 [2024-11-16 19:07:42,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 228 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:07:42,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:42,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 100 [2024-11-16 19:07:42,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:12,023 INFO L124 PetriNetUnfolderBase]: 266291/349185 cut-off events. [2024-11-16 19:08:12,024 INFO L125 PetriNetUnfolderBase]: For 19044/19044 co-relation queries the response was YES. [2024-11-16 19:08:12,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692505 conditions, 349185 events. 266291/349185 cut-off events. For 19044/19044 co-relation queries the response was YES. Maximal size of possible extension queue 6589. Compared 2315506 event pairs, 222087 based on Foata normal form. 110038/412934 useless extension candidates. Maximal degree in co-relation 166953. Up to 334061 conditions per place. [2024-11-16 19:08:14,497 INFO L140 encePairwiseOnDemand]: 82/100 looper letters, 55 selfloop transitions, 0 changer transitions 0/73 dead transitions. [2024-11-16 19:08:14,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 284 flow [2024-11-16 19:08:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:08:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:08:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 109 transitions. [2024-11-16 19:08:14,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-11-16 19:08:14,502 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 228 flow. Second operand 2 states and 109 transitions. [2024-11-16 19:08:14,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 284 flow [2024-11-16 19:08:14,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 278 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:14,519 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 168 flow [2024-11-16 19:08:14,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-11-16 19:08:14,520 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -13 predicate places. [2024-11-16 19:08:14,520 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 168 flow [2024-11-16 19:08:14,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:14,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:14,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:08:14,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:08:14,521 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:08:14,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash -734415291, now seen corresponding path program 1 times [2024-11-16 19:08:14,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:14,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946764442] [2024-11-16 19:08:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:14,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:15,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946764442] [2024-11-16 19:08:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946764442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:15,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:08:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429001889] [2024-11-16 19:08:15,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:15,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:08:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:08:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:08:15,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 100 [2024-11-16 19:08:15,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:15,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:15,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 100 [2024-11-16 19:08:15,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand