./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 00:57:45,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 00:57:45,462 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 00:57:45,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 00:57:45,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 00:57:45,488 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 00:57:45,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 00:57:45,489 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 00:57:45,490 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 00:57:45,490 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 00:57:45,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 00:57:45,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 00:57:45,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 00:57:45,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 00:57:45,491 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 00:57:45,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 00:57:45,492 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 00:57:45,493 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 00:57:45,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:57:45,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 00:57:45,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 00:57:45,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 00:57:45,495 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e [2025-03-09 00:57:45,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 00:57:45,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 00:57:45,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 00:57:45,719 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 00:57:45,719 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 00:57:45,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2025-03-09 00:57:46,836 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c300aae5e/51bd4ae807f443ee9eb72fe002bcbc5d/FLAG97b79f177 [2025-03-09 00:57:47,089 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 00:57:47,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2025-03-09 00:57:47,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c300aae5e/51bd4ae807f443ee9eb72fe002bcbc5d/FLAG97b79f177 [2025-03-09 00:57:47,408 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c300aae5e/51bd4ae807f443ee9eb72fe002bcbc5d [2025-03-09 00:57:47,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 00:57:47,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 00:57:47,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 00:57:47,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 00:57:47,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 00:57:47,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a3c939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47, skipping insertion in model container [2025-03-09 00:57:47,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 00:57:47,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:57:47,726 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 00:57:47,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:57:47,798 INFO L204 MainTranslator]: Completed translation [2025-03-09 00:57:47,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47 WrapperNode [2025-03-09 00:57:47,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 00:57:47,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 00:57:47,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 00:57:47,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 00:57:47,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,842 INFO L138 Inliner]: procedures = 179, calls = 47, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 823 [2025-03-09 00:57:47,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 00:57:47,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 00:57:47,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 00:57:47,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 00:57:47,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,855 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,872 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [6, 4, 2, 12]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [1, 1, 2, 2]. The 9 writes are split as follows [2, 2, 0, 5]. [2025-03-09 00:57:47,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,883 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 00:57:47,896 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 00:57:47,896 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 00:57:47,896 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 00:57:47,896 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (1/1) ... [2025-03-09 00:57:47,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:57:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:57:47,928 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) [2025-03-09 00:57:47,930 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 [2025-03-09 00:57:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 00:57:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 00:57:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-09 00:57:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-09 00:57:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-09 00:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 00:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 00:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-09 00:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-09 00:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 00:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 00:57:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 00:57:47,950 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 00:57:48,064 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 00:57:48,066 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 00:57:48,844 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 00:57:48,845 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 00:58:02,992 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 00:58:02,994 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 00:58:02,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:58:02 BoogieIcfgContainer [2025-03-09 00:58:02,994 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 00:58:02,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 00:58:02,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 00:58:02,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 00:58:03,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 12:57:47" (1/3) ... [2025-03-09 00:58:03,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c062e59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:58:03, skipping insertion in model container [2025-03-09 00:58:03,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:57:47" (2/3) ... [2025-03-09 00:58:03,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c062e59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:58:03, skipping insertion in model container [2025-03-09 00:58:03,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:58:02" (3/3) ... [2025-03-09 00:58:03,002 INFO L128 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2025-03-09 00:58:03,017 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 00:58:03,018 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 26_stack_cas_longer-2.i that has 2 procedures, 73 locations, 1 initial locations, 3 loop locations, and 40 error locations. [2025-03-09 00:58:03,018 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 00:58:03,193 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-09 00:58:03,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 81 transitions, 166 flow [2025-03-09 00:58:03,333 INFO L124 PetriNetUnfolderBase]: 8/85 cut-off events. [2025-03-09 00:58:03,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 00:58:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 8/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 192 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 78. Up to 3 conditions per place. [2025-03-09 00:58:03,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 81 transitions, 166 flow [2025-03-09 00:58:03,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 81 transitions, 166 flow [2025-03-09 00:58:03,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 00:58:03,358 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=None, 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;@7572bcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 00:58:03,358 INFO L334 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2025-03-09 00:58:03,398 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 00:58:03,398 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-03-09 00:58:03,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 00:58:03,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:58:03,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 00:58:03,400 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err38REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2025-03-09 00:58:03,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:58:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1900269, now seen corresponding path program 1 times [2025-03-09 00:58:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:58:03,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481853621] [2025-03-09 00:58:03,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:58:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms