./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-wmm/safe016_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 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-wmm/safe016_rmo.oepc.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 ef808fc1470b7509ff56eb59d7d443a24f9bd367b94a6fd316176ae1cba1f1f6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 09:56:03,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 09:56:03,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 09:56:03,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 09:56:03,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 09:56:03,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 09:56:03,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 09:56:03,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 09:56:03,288 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 09:56:03,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 09:56:03,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 09:56:03,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 09:56:03,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 09:56:03,289 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:56:03,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 09:56:03,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 09:56:03,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 09:56:03,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 09:56:03,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 09:56:03,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 09:56:03,290 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 -> ef808fc1470b7509ff56eb59d7d443a24f9bd367b94a6fd316176ae1cba1f1f6 [2025-03-04 09:56:03,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 09:56:03,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 09:56:03,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 09:56:03,545 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 09:56:03,545 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 09:56:03,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe016_rmo.oepc.i [2025-03-04 09:56:04,741 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6239c496f/35c0bc2a65904233b3936495f9f30bc5/FLAG09b261c4b [2025-03-04 09:56:05,061 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 09:56:05,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.oepc.i [2025-03-04 09:56:05,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6239c496f/35c0bc2a65904233b3936495f9f30bc5/FLAG09b261c4b [2025-03-04 09:56:05,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6239c496f/35c0bc2a65904233b3936495f9f30bc5 [2025-03-04 09:56:05,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 09:56:05,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 09:56:05,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 09:56:05,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 09:56:05,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 09:56:05,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff14afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05, skipping insertion in model container [2025-03-04 09:56:05,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,361 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 09:56:05,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:56:05,715 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 09:56:05,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:56:05,807 INFO L204 MainTranslator]: Completed translation [2025-03-04 09:56:05,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05 WrapperNode [2025-03-04 09:56:05,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 09:56:05,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 09:56:05,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 09:56:05,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 09:56:05,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,851 INFO L138 Inliner]: procedures = 176, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 176 [2025-03-04 09:56:05,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 09:56:05,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 09:56:05,857 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 09:56:05,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 09:56:05,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,893 INFO L175 MemorySlicer]: Split 24 memory accesses to 2 slices as follows [2, 22]. 92 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2025-03-04 09:56:05,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,901 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,904 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 09:56:05,908 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 09:56:05,908 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 09:56:05,908 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 09:56:05,913 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (1/1) ... [2025-03-04 09:56:05,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:56:05,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:56:05,950 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) [2025-03-04 09:56:05,953 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 [2025-03-04 09:56:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 09:56:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 09:56:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-03-04 09:56:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-03-04 09:56:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-03-04 09:56:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-03-04 09:56:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-03-04 09:56:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2025-03-04 09:56:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2025-03-04 09:56:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 09:56:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 09:56:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 09:56:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 09:56:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 09:56:05,977 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 09:56:06,126 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 09:56:06,128 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 09:56:06,547 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 09:56:06,547 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 09:56:07,039 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 09:56:07,041 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 09:56:07,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:56:07 BoogieIcfgContainer [2025-03-04 09:56:07,042 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 09:56:07,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 09:56:07,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 09:56:07,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 09:56:07,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 09:56:05" (1/3) ... [2025-03-04 09:56:07,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ce8f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:56:07, skipping insertion in model container [2025-03-04 09:56:07,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:56:05" (2/3) ... [2025-03-04 09:56:07,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ce8f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:56:07, skipping insertion in model container [2025-03-04 09:56:07,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:56:07" (3/3) ... [2025-03-04 09:56:07,051 INFO L128 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2025-03-04 09:56:07,066 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 09:56:07,067 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe016_rmo.oepc.i that has 5 procedures, 91 locations, 1 initial locations, 0 loop locations, and 44 error locations. [2025-03-04 09:56:07,068 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 09:56:07,169 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 09:56:07,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 92 transitions, 200 flow [2025-03-04 09:56:07,251 INFO L124 PetriNetUnfolderBase]: 2/88 cut-off events. [2025-03-04 09:56:07,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:56:07,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 88 events. 2/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 317 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2025-03-04 09:56:07,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 92 transitions, 200 flow [2025-03-04 09:56:07,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 88 transitions, 188 flow [2025-03-04 09:56:07,270 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 09:56:07,281 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;@1cbd2abd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 09:56:07,282 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2025-03-04 09:56:07,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 09:56:07,286 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2025-03-04 09:56:07,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:56:07,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:56:07,287 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-04 09:56:07,287 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2025-03-04 09:56:07,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:56:07,291 INFO L85 PathProgramCache]: Analyzing trace with hash 25516446, now seen corresponding path program 1 times [2025-03-04 09:56:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:56:07,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057123183] [2025-03-04 09:56:07,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:56:07,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:56:07,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-04 09:56:07,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-04 09:56:07,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:56:07,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:56:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:56:07,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:56:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057123183] [2025-03-04 09:56:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057123183] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:56:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:56:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 09:56:07,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947281822] [2025-03-04 09:56:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:56:07,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:56:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:56:07,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:56:07,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:56:07,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 92 [2025-03-04 09:56:07,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-03-04 09:56:07,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:56:07,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 92 [2025-03-04 09:56:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 09:56:21,276 INFO L124 PetriNetUnfolderBase]: 128528/177183 cut-off events. [2025-03-04 09:56:21,276 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2025-03-04 09:56:21,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344948 conditions, 177183 events. 128528/177183 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 6552. Compared 1297431 event pairs, 128528 based on Foata normal form. 5040/137053 useless extension candidates. Maximal degree in co-relation 344936. Up to 167043 conditions per place. [2025-03-04 09:56:22,483 INFO L140 encePairwiseOnDemand]: 59/92 looper letters, 46 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2025-03-04 09:56:22,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 216 flow [2025-03-04 09:56:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:56:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 09:56:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2025-03-04 09:56:22,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-04 09:56:22,496 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 188 flow. Second operand 3 states and 115 transitions. [2025-03-04 09:56:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 216 flow [2025-03-04 09:56:22,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 212 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 09:56:22,510 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 120 flow [2025-03-04 09:56:22,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2025-03-04 09:56:22,517 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -33 predicate places. [2025-03-04 09:56:22,518 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 120 flow [2025-03-04 09:56:22,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-03-04 09:56:22,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:56:22,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-04 09:56:22,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 09:56:22,519 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2025-03-04 09:56:22,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:56:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash 25516447, now seen corresponding path program 1 times [2025-03-04 09:56:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:56:22,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893446938] [2025-03-04 09:56:22,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:56:22,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:56:22,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-04 09:56:22,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-04 09:56:22,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:56:22,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:56:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:56:22,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:56:22,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893446938] [2025-03-04 09:56:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893446938] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:56:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:56:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 09:56:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971658247] [2025-03-04 09:56:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:56:22,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:56:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:56:22,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:56:22,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:56:22,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 92 [2025-03-04 09:56:22,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-03-04 09:56:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:56:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 92 [2025-03-04 09:56:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 09:56:27,329 INFO L124 PetriNetUnfolderBase]: 35377/50259 cut-off events. [2025-03-04 09:56:27,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:56:27,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97307 conditions, 50259 events. 35377/50259 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 333317 event pairs, 35377 based on Foata normal form. 0/48389 useless extension candidates. Maximal degree in co-relation 97301. Up to 46610 conditions per place. [2025-03-04 09:56:27,616 INFO L140 encePairwiseOnDemand]: 81/92 looper letters, 35 selfloop transitions, 1 changer transitions 1/45 dead transitions. [2025-03-04 09:56:27,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 174 flow [2025-03-04 09:56:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:56:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 09:56:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2025-03-04 09:56:27,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3007246376811594 [2025-03-04 09:56:27,618 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 120 flow. Second operand 3 states and 83 transitions. [2025-03-04 09:56:27,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 174 flow [2025-03-04 09:56:27,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 09:56:27,619 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 99 flow [2025-03-04 09:56:27,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2025-03-04 09:56:27,620 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -42 predicate places. [2025-03-04 09:56:27,620 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 99 flow [2025-03-04 09:56:27,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-03-04 09:56:27,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:56:27,621 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:56:27,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 09:56:27,624 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2025-03-04 09:56:27,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:56:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1670998972, now seen corresponding path program 1 times [2025-03-04 09:56:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:56:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117212797] [2025-03-04 09:56:27,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:56:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:56:27,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 09:56:27,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 09:56:27,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:56:27,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:56:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:56:27,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:56:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117212797] [2025-03-04 09:56:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117212797] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:56:27,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:56:27,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 09:56:27,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034537302] [2025-03-04 09:56:27,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:56:27,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:56:27,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:56:27,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:56:27,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:56:27,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 92 [2025-03-04 09:56:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-04 09:56:27,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:56:27,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 92 [2025-03-04 09:56:27,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 09:56:30,555 INFO L124 PetriNetUnfolderBase]: 31407/42052 cut-off events. [2025-03-04 09:56:30,556 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:56:30,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83931 conditions, 42052 events. 31407/42052 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 252880 event pairs, 4442 based on Foata normal form. 0/40538 useless extension candidates. Maximal degree in co-relation 83924. Up to 36776 conditions per place. [2025-03-04 09:56:30,808 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 61 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2025-03-04 09:56:30,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 285 flow [2025-03-04 09:56:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:56:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 09:56:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2025-03-04 09:56:30,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36594202898550726 [2025-03-04 09:56:30,812 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 99 flow. Second operand 3 states and 101 transitions. [2025-03-04 09:56:30,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 285 flow [2025-03-04 09:56:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 09:56:30,814 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 108 flow [2025-03-04 09:56:30,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2025-03-04 09:56:30,816 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -41 predicate places. [2025-03-04 09:56:30,816 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 108 flow [2025-03-04 09:56:30,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-04 09:56:30,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:56:30,817 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:56:30,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 09:56:30,817 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2025-03-04 09:56:30,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:56:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 487855895, now seen corresponding path program 1 times [2025-03-04 09:56:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:56:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392574682] [2025-03-04 09:56:30,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:56:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:56:30,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 09:56:30,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 09:56:30,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:56:30,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:56:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:56:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:56:31,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392574682] [2025-03-04 09:56:31,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392574682] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:56:31,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:56:31,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 09:56:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074335972] [2025-03-04 09:56:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:56:31,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:56:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:56:31,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:56:31,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:56:31,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 92 [2025-03-04 09:56:31,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2025-03-04 09:56:31,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:56:31,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 92 [2025-03-04 09:56:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 09:56:33,947 INFO L124 PetriNetUnfolderBase]: 28982/38877 cut-off events. [2025-03-04 09:56:33,947 INFO L125 PetriNetUnfolderBase]: For 2022/2022 co-relation queries the response was YES. [2025-03-04 09:56:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81177 conditions, 38877 events. 28982/38877 cut-off events. For 2022/2022 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 232797 event pairs, 3842 based on Foata normal form. 0/38863 useless extension candidates. Maximal degree in co-relation 81168. Up to 33600 conditions per place. [2025-03-04 09:56:34,216 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 60 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-04 09:56:34,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 288 flow [2025-03-04 09:56:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:56:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 09:56:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2025-03-04 09:56:34,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3016304347826087 [2025-03-04 09:56:34,218 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 108 flow. Second operand 4 states and 111 transitions. [2025-03-04 09:56:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 288 flow [2025-03-04 09:56:34,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 09:56:34,228 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 104 flow [2025-03-04 09:56:34,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2025-03-04 09:56:34,230 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -41 predicate places. [2025-03-04 09:56:34,230 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 104 flow [2025-03-04 09:56:34,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2025-03-04 09:56:34,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:56:34,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:56:34,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 09:56:34,231 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2025-03-04 09:56:34,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:56:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash 487855894, now seen corresponding path program 1 times [2025-03-04 09:56:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:56:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984901725] [2025-03-04 09:56:34,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:56:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:56:34,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 09:56:34,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 09:56:34,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:56:34,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:56:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:56:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:56:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984901725] [2025-03-04 09:56:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984901725] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:56:34,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:56:34,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:56:34,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200386154] [2025-03-04 09:56:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:56:34,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:56:34,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:56:34,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:56:34,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:56:34,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 92 [2025-03-04 09:56:34,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2025-03-04 09:56:34,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:56:34,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 92 [2025-03-04 09:56:34,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand