./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:49:30,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:49:30,812 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:49:30,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:49:30,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:49:30,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:49:30,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:49:30,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:49:30,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:49:30,847 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:49:30,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:49:30,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:49:30,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:49:30,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:49:30,849 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:49:30,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:49:30,849 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:49:30,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:49:30,851 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:49:30,851 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:49:30,851 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:49:30,851 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:49:30,851 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:49:30,851 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:49:30,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:49:30,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:49:30,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:49:30,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:49:30,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:49:30,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:49:30,853 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-jdk21/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 -> e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee [2025-02-06 12:49:31,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:49:31,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:49:31,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:49:31,336 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:49:31,337 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:49:31,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2025-02-06 12:49:32,873 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f0a0867f4/5ab696ba470f4fa9872b24a89231de1f/FLAG8a81b5cbf [2025-02-06 12:49:33,295 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:49:33,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2025-02-06 12:49:33,316 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f0a0867f4/5ab696ba470f4fa9872b24a89231de1f/FLAG8a81b5cbf [2025-02-06 12:49:33,335 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f0a0867f4/5ab696ba470f4fa9872b24a89231de1f [2025-02-06 12:49:33,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:49:33,340 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:49:33,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:49:33,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:49:33,347 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:49:33,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:49:33" (1/1) ... [2025-02-06 12:49:33,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14894776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:33, skipping insertion in model container [2025-02-06 12:49:33,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:49:33" (1/1) ... [2025-02-06 12:49:33,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:49:33,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:49:33,770 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:49:33,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:49:34,040 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:49:34,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34 WrapperNode [2025-02-06 12:49:34,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:49:34,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:49:34,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:49:34,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:49:34,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,109 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2025-02-06 12:49:34,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:49:34,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:49:34,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:49:34,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:49:34,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,169 INFO L175 MemorySlicer]: Split 28 memory accesses to 2 slices as follows [26, 2]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 11 writes are split as follows [11, 0]. [2025-02-06 12:49:34,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,191 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:49:34,212 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:49:34,213 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:49:34,213 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:49:34,214 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (1/1) ... [2025-02-06 12:49:34,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:49:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:49:34,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:49:34,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:49:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-02-06 12:49:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-02-06 12:49:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-02-06 12:49:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-02-06 12:49:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2025-02-06 12:49:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2025-02-06 12:49:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:49:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:49:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 12:49:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:49:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:49:34,279 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:49:34,464 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:49:34,466 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:49:35,299 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:49:35,300 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:49:36,343 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:49:36,343 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:49:36,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:49:36 BoogieIcfgContainer [2025-02-06 12:49:36,344 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:49:36,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:49:36,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:49:36,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:49:36,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:49:33" (1/3) ... [2025-02-06 12:49:36,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453bb817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:49:36, skipping insertion in model container [2025-02-06 12:49:36,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:49:34" (2/3) ... [2025-02-06 12:49:36,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453bb817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:49:36, skipping insertion in model container [2025-02-06 12:49:36,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:49:36" (3/3) ... [2025-02-06 12:49:36,358 INFO L128 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2025-02-06 12:49:36,375 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:49:36,380 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe016_rmo.opt.i that has 5 procedures, 99 locations, 1 initial locations, 0 loop locations, and 52 error locations. [2025-02-06 12:49:36,381 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:49:36,540 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:49:36,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 100 transitions, 216 flow [2025-02-06 12:49:36,644 INFO L124 PetriNetUnfolderBase]: 2/96 cut-off events. [2025-02-06 12:49:36,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:49:36,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 2/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 404 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2025-02-06 12:49:36,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 100 transitions, 216 flow [2025-02-06 12:49:36,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 204 flow [2025-02-06 12:49:36,672 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:49:36,685 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;@65ce3b44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:49:36,685 INFO L334 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2025-02-06 12:49:36,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:49:36,696 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2025-02-06 12:49:36,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:49:36,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:49:36,697 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 12:49:36,698 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2025-02-06 12:49:36,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:49:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 873561496, now seen corresponding path program 1 times [2025-02-06 12:49:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:49:36,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8053550] [2025-02-06 12:49:36,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:49:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:49:36,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:49:36,826 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:49:36,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:49:36,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:49:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:49:37,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:49:37,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8053550] [2025-02-06 12:49:37,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8053550] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:49:37,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:49:37,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 12:49:37,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262648042] [2025-02-06 12:49:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:49:37,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:49:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:49:37,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:49:37,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:49:37,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 100 [2025-02-06 12:49:37,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2025-02-06 12:49:37,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:49:37,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 100 [2025-02-06 12:49:37,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand