./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 f8ab0bd5 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-?-f8ab0bd-m [2025-03-13 21:27:24,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:27:24,956 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:27:24,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:27:24,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:27:24,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:27:24,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:27:24,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:27:24,984 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:27:24,984 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:27:24,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:27:24,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:27:24,985 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:27:24,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:27:24,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:27:24,986 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:27:24,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:27:24,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:27:24,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:27:24,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:27:24,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:27:24,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:27:24,988 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 [2025-03-13 21:27:25,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:27:25,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:27:25,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:27:25,207 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:27:25,207 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:27:25,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2025-03-13 21:27:26,356 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8936bf9a0/80b839cd8f8f4f33818e92bf2332db09/FLAG8ccafc994 [2025-03-13 21:27:26,633 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:27:26,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2025-03-13 21:27:26,649 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8936bf9a0/80b839cd8f8f4f33818e92bf2332db09/FLAG8ccafc994 [2025-03-13 21:27:26,936 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8936bf9a0/80b839cd8f8f4f33818e92bf2332db09 [2025-03-13 21:27:26,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:27:26,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:27:26,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:27:26,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:27:26,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:27:26,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:27:26" (1/1) ... [2025-03-13 21:27:26,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1b1616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:26, skipping insertion in model container [2025-03-13 21:27:26,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:27:26" (1/1) ... [2025-03-13 21:27:26,973 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:27:27,217 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] [2025-03-13 21:27:27,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:27:27,240 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:27:27,266 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] [2025-03-13 21:27:27,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:27:27,297 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:27:27,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27 WrapperNode [2025-03-13 21:27:27,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:27:27,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:27:27,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:27:27,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:27:27,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,310 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,327 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 243 [2025-03-13 21:27:27,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:27:27,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:27:27,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:27:27,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:27:27,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,346 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 4, 6, 12]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 2]. The 9 writes are split as follows [0, 2, 2, 5]. [2025-03-13 21:27:27,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,352 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,354 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:27:27,357 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:27:27,357 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:27:27,357 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:27:27,358 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (1/1) ... [2025-03-13 21:27:27,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:27:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:27:27,382 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) [2025-03-13 21:27:27,385 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 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-13 21:27:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-13 21:27:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:27:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:27:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:27:27,400 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:27:27,492 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:27:27,494 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:27:27,795 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:27:27,795 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:27:27,796 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:27:28,210 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:27:28,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:27:28 BoogieIcfgContainer [2025-03-13 21:27:28,210 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:27:28,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:27:28,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:27:28,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:27:28,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:27:26" (1/3) ... [2025-03-13 21:27:28,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1827569a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:27:28, skipping insertion in model container [2025-03-13 21:27:28,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:27" (2/3) ... [2025-03-13 21:27:28,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1827569a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:27:28, skipping insertion in model container [2025-03-13 21:27:28,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:27:28" (3/3) ... [2025-03-13 21:27:28,216 INFO L128 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2025-03-13 21:27:28,230 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:27:28,231 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. [2025-03-13 21:27:28,231 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:27:28,268 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:27:28,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 35 transitions, 74 flow [2025-03-13 21:27:28,313 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2025-03-13 21:27:28,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:27:28,318 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 29 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. [2025-03-13 21:27:28,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 35 transitions, 74 flow [2025-03-13 21:27:28,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 35 transitions, 74 flow [2025-03-13 21:27:28,326 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:27:28,336 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;@4bef1b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:27:28,336 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:27:28,341 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:27:28,341 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2025-03-13 21:27:28,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:27:28,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:28,342 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-13 21:27:28,342 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-13 21:27:28,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1038613461, now seen corresponding path program 1 times [2025-03-13 21:27:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327711057] [2025-03-13 21:27:28,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:27:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:28,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-13 21:27:28,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-13 21:27:28,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:28,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:28,726 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-13 21:27:28,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-13 21:27:28,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-13 21:27:28,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:28,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:28,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-13 21:27:28,776 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-13 21:27:28,777 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-03-13 21:27:28,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-03-13 21:27:28,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2025-03-13 21:27:28,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:27:28,779 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-13 21:27:28,782 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-13 21:27:28,784 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-13 21:27:28,830 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:27:28,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 65 transitions, 140 flow [2025-03-13 21:27:28,856 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2025-03-13 21:27:28,856 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:27:28,857 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 125 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. [2025-03-13 21:27:28,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 65 transitions, 140 flow [2025-03-13 21:27:28,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 65 transitions, 140 flow [2025-03-13 21:27:28,861 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:27:28,862 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;@4bef1b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:27:28,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:27:28,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:27:28,869 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2025-03-13 21:27:28,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:27:28,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:28,869 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-03-13 21:27:28,869 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)] === [2025-03-13 21:27:28,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -67265312, now seen corresponding path program 1 times [2025-03-13 21:27:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658307807] [2025-03-13 21:27:28,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:27:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:29,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:27:29,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:27:29,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,160 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-13 21:27:29,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:27:29,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:27:29,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,190 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-13 21:27:29,190 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-13 21:27:29,190 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-03-13 21:27:29,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-03-13 21:27:29,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-03-13 21:27:29,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-13 21:27:29,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:27:29,191 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-13 21:27:29,191 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-13 21:27:29,191 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-13 21:27:29,255 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:27:29,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 95 transitions, 208 flow [2025-03-13 21:27:29,284 INFO L124 PetriNetUnfolderBase]: 18/103 cut-off events. [2025-03-13 21:27:29,285 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-13 21:27:29,287 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 259 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. [2025-03-13 21:27:29,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 95 transitions, 208 flow [2025-03-13 21:27:29,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 95 transitions, 208 flow [2025-03-13 21:27:29,292 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:27:29,292 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;@4bef1b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:27:29,292 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-13 21:27:29,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:27:29,300 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2025-03-13 21:27:29,300 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-13 21:27:29,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:29,300 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2025-03-13 21:27:29,301 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)] === [2025-03-13 21:27:29,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1230652268, now seen corresponding path program 1 times [2025-03-13 21:27:29,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:29,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37941991] [2025-03-13 21:27:29,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:27:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:29,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:27:29,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:27:29,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,512 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-13 21:27:29,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:27:29,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:27:29,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-13 21:27:29,529 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-13 21:27:29,529 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-03-13 21:27:29,529 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-03-13 21:27:29,529 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-03-13 21:27:29,529 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-03-13 21:27:29,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-03-13 21:27:29,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:27:29,530 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-13 21:27:29,534 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-13 21:27:29,534 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-03-13 21:27:29,597 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:27:29,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 125 transitions, 278 flow [2025-03-13 21:27:29,618 INFO L124 PetriNetUnfolderBase]: 24/136 cut-off events. [2025-03-13 21:27:29,620 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-13 21:27:29,623 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 405 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. [2025-03-13 21:27:29,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 125 transitions, 278 flow [2025-03-13 21:27:29,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 278 flow [2025-03-13 21:27:29,627 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:27:29,628 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;@4bef1b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:27:29,628 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-13 21:27:29,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:27:29,641 INFO L124 PetriNetUnfolderBase]: 5/63 cut-off events. [2025-03-13 21:27:29,641 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-13 21:27:29,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:29,641 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2025-03-13 21:27:29,641 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)] === [2025-03-13 21:27:29,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1137952299, now seen corresponding path program 1 times [2025-03-13 21:27:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:29,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048365703] [2025-03-13 21:27:29,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:27:29,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:29,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:27:29,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:27:29,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,836 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-13 21:27:29,844 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:27:29,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:27:29,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:29,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:27:29,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-13 21:27:29,857 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-13 21:27:29,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-13 21:27:29,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:27:29,858 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-13 21:27:29,859 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-13 21:27:29,859 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-03-13 21:27:29,920 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:27:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 155 transitions, 350 flow [2025-03-13 21:27:29,950 INFO L124 PetriNetUnfolderBase]: 30/169 cut-off events. [2025-03-13 21:27:29,951 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-13 21:27:29,952 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 558 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. [2025-03-13 21:27:29,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 155 transitions, 350 flow [2025-03-13 21:27:29,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 155 transitions, 350 flow [2025-03-13 21:27:29,955 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:27:29,955 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;@4bef1b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:27:29,956 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-13 21:27:29,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:27:29,968 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2025-03-13 21:27:29,968 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-13 21:27:29,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:29,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:27:29,969 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2025-03-13 21:27:29,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1243040635, now seen corresponding path program 1 times [2025-03-13 21:27:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419795572] [2025-03-13 21:27:29,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:27:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:30,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:27:30,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:27:30,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:27:30,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:27:30,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419795572] [2025-03-13 21:27:30,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419795572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:27:30,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:27:30,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:27:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264278354] [2025-03-13 21:27:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:27:30,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:27:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:27:30,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:27:30,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:27:30,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 155 [2025-03-13 21:27:30,359 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) [2025-03-13 21:27:30,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:27:30,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 155 [2025-03-13 21:27:30,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand