./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/26_stack_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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.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 3df48c747d95355ac505f3aa498934ae4a3962ec64d7e6dbfdd54f02fbeda355 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:14:07,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:14:07,883 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:14:07,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:14:07,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:14:07,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:14:07,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:14:07,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:14:07,914 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:14:07,914 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:14:07,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:14:07,915 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:14:07,915 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:14:07,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:14:07,915 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:14:07,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:14:07,916 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:14:07,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:14:07,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:14:07,917 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 3df48c747d95355ac505f3aa498934ae4a3962ec64d7e6dbfdd54f02fbeda355 [2025-03-08 17:14:08,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:14:08,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:14:08,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:14:08,243 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:14:08,243 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:14:08,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2025-03-08 17:14:09,393 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767984140/e784fdb12dc6487491c2b288ae3a29e8/FLAGbb065c3eb [2025-03-08 17:14:09,653 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:14:09,655 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2025-03-08 17:14:09,669 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767984140/e784fdb12dc6487491c2b288ae3a29e8/FLAGbb065c3eb [2025-03-08 17:14:09,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767984140/e784fdb12dc6487491c2b288ae3a29e8 [2025-03-08 17:14:09,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:14:09,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:14:09,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:14:09,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:14:09,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:14:09,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:14:09" (1/1) ... [2025-03-08 17:14:09,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b34ac83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:09, skipping insertion in model container [2025-03-08 17:14:09,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:14:09" (1/1) ... [2025-03-08 17:14:09,992 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:14:10,209 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.i[31294,31307] [2025-03-08 17:14:10,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:14:10,229 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:14:10,258 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.i[31294,31307] [2025-03-08 17:14:10,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:14:10,285 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:14:10,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10 WrapperNode [2025-03-08 17:14:10,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:14:10,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:14:10,286 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:14:10,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:14:10,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,313 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 243 [2025-03-08 17:14:10,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:14:10,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:14:10,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:14:10,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:14:10,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,338 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 6, 12, 4]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 2, 1]. The 9 writes are split as follows [0, 2, 5, 2]. [2025-03-08 17:14:10,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,346 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:14:10,352 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:14:10,352 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:14:10,352 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:14:10,352 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (1/1) ... [2025-03-08 17:14:10,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:14:10,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:14:10,374 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) [2025-03-08 17:14:10,375 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 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-08 17:14:10,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:14:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 17:14:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-08 17:14:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:14:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:14:10,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:14:10,392 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:14:10,501 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:14:10,502 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:14:10,786 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:14:10,787 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:14:11,094 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:14:11,095 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:14:11,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:14:11 BoogieIcfgContainer [2025-03-08 17:14:11,095 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:14:11,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:14:11,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:14:11,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:14:11,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:14:09" (1/3) ... [2025-03-08 17:14:11,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a1ba27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:14:11, skipping insertion in model container [2025-03-08 17:14:11,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:14:10" (2/3) ... [2025-03-08 17:14:11,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a1ba27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:14:11, skipping insertion in model container [2025-03-08 17:14:11,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:14:11" (3/3) ... [2025-03-08 17:14:11,101 INFO L128 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2025-03-08 17:14:11,112 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:14:11,113 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 26_stack_cas.i that has 2 procedures, 29 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:14:11,113 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:14:11,160 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:14:11,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 35 transitions, 74 flow [2025-03-08 17:14:11,208 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2025-03-08 17:14:11,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:14:11,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 6/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 32. Up to 3 conditions per place. [2025-03-08 17:14:11,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 35 transitions, 74 flow [2025-03-08 17:14:11,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 35 transitions, 74 flow [2025-03-08 17:14:11,221 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:14:11,228 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;@626547e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:14:11,228 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:14:11,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:14:11,232 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2025-03-08 17:14:11,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:14:11,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:11,233 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-08 17:14:11,233 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 17:14:11,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:11,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1039537013, now seen corresponding path program 1 times [2025-03-08 17:14:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:11,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416548105] [2025-03-08 17:14:11,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:14:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:11,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-08 17:14:11,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-08 17:14:11,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:11,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:11,611 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 17:14:11,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-08 17:14:11,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-08 17:14:11,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:11,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:11,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 17:14:11,661 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 17:14:11,662 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-03-08 17:14:11,663 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-03-08 17:14:11,664 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2025-03-08 17:14:11,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:14:11,664 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-08 17:14:11,668 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 17:14:11,668 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-08 17:14:11,711 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:14:11,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 65 transitions, 140 flow [2025-03-08 17:14:11,731 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2025-03-08 17:14:11,732 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:14:11,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 12/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 122 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 61. Up to 3 conditions per place. [2025-03-08 17:14:11,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 65 transitions, 140 flow [2025-03-08 17:14:11,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 65 transitions, 140 flow [2025-03-08 17:14:11,736 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:14:11,737 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;@626547e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:14:11,739 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:14:11,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:14:11,745 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2025-03-08 17:14:11,745 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:14:11,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:11,745 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-03-08 17:14:11,745 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)] === [2025-03-08 17:14:11,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1676468575, now seen corresponding path program 1 times [2025-03-08 17:14:11,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:11,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692639232] [2025-03-08 17:14:11,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:14:11,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:12,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 17:14:12,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 17:14:12,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,132 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 17:14:12,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 17:14:12,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 17:14:12,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 17:14:12,178 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 17:14:12,178 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-03-08 17:14:12,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-03-08 17:14:12,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-03-08 17:14:12,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-08 17:14:12,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:14:12,179 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-08 17:14:12,179 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 17:14:12,179 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-08 17:14:12,227 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:14:12,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 95 transitions, 208 flow [2025-03-08 17:14:12,249 INFO L124 PetriNetUnfolderBase]: 18/103 cut-off events. [2025-03-08 17:14:12,249 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 17:14:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 18/103 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 258 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2025-03-08 17:14:12,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 95 transitions, 208 flow [2025-03-08 17:14:12,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 95 transitions, 208 flow [2025-03-08 17:14:12,253 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:14:12,253 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;@626547e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:14:12,253 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:14:12,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:14:12,263 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2025-03-08 17:14:12,263 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 17:14:12,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:12,263 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2025-03-08 17:14:12,263 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-03-08 17:14:12,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1283869740, now seen corresponding path program 1 times [2025-03-08 17:14:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768402719] [2025-03-08 17:14:12,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:14:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:12,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:14:12,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:14:12,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,458 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 17:14:12,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:14:12,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:14:12,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 17:14:12,490 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 17:14:12,490 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-03-08 17:14:12,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-03-08 17:14:12,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-03-08 17:14:12,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-03-08 17:14:12,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-03-08 17:14:12,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:14:12,490 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-08 17:14:12,491 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 17:14:12,491 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-03-08 17:14:12,549 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:14:12,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 125 transitions, 278 flow [2025-03-08 17:14:12,581 INFO L124 PetriNetUnfolderBase]: 24/136 cut-off events. [2025-03-08 17:14:12,581 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-08 17:14:12,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 136 events. 24/136 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 398 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 119. Up to 5 conditions per place. [2025-03-08 17:14:12,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 125 transitions, 278 flow [2025-03-08 17:14:12,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 278 flow [2025-03-08 17:14:12,584 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:14:12,585 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;@626547e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:14:12,585 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-08 17:14:12,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:14:12,594 INFO L124 PetriNetUnfolderBase]: 5/63 cut-off events. [2025-03-08 17:14:12,594 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-08 17:14:12,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:12,594 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2025-03-08 17:14:12,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-03-08 17:14:12,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1696728396, now seen corresponding path program 1 times [2025-03-08 17:14:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:12,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971088983] [2025-03-08 17:14:12,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:14:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:12,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:14:12,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:14:12,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,888 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 17:14:12,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:14:12,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:14:12,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:12,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:14:12,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 17:14:12,916 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-08 17:14:12,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-08 17:14:12,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:14:12,918 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-08 17:14:12,918 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 17:14:12,918 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-03-08 17:14:12,985 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:14:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 155 transitions, 350 flow [2025-03-08 17:14:13,022 INFO L124 PetriNetUnfolderBase]: 30/169 cut-off events. [2025-03-08 17:14:13,023 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-08 17:14:13,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 169 events. 30/169 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 554 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2025-03-08 17:14:13,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 155 transitions, 350 flow [2025-03-08 17:14:13,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 155 transitions, 350 flow [2025-03-08 17:14:13,030 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:14:13,031 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;@626547e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:14:13,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-08 17:14:13,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:14:13,044 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2025-03-08 17:14:13,044 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-08 17:14:13,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:13,044 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:14:13,044 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2025-03-08 17:14:13,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 732506458, now seen corresponding path program 1 times [2025-03-08 17:14:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:13,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972544895] [2025-03-08 17:14:13,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:14:13,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:13,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:14:13,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:14:13,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:14:13,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:14:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:13,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:14:13,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972544895] [2025-03-08 17:14:13,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972544895] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:14:13,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:14:13,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:14:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736853241] [2025-03-08 17:14:13,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:14:13,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:14:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:14:13,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:14:13,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:14:13,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 155 [2025-03-08 17:14:13,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2025-03-08 17:14:13,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:14:13,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 155 [2025-03-08 17:14:13,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand