./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-wmm/safe027_power.opt.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/safe027_power.opt.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 3edc5a2d9ce2881b3565fd36253c94b9cf356a0dafd043fa3f9d27823541c09b --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 09:57:23,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 09:57:23,542 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 09:57:23,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 09:57:23,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 09:57:23,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 09:57:23,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 09:57:23,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 09:57:23,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 09:57:23,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 09:57:23,563 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 09:57:23,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 09:57:23,563 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 09:57:23,564 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:57:23,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 09:57:23,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 09:57:23,564 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 -> 3edc5a2d9ce2881b3565fd36253c94b9cf356a0dafd043fa3f9d27823541c09b [2025-03-04 09:57:23,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 09:57:23,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 09:57:23,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 09:57:23,817 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 09:57:23,817 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 09:57:23,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe027_power.opt.i [2025-03-04 09:57:24,994 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a55943c3/7e0bd5ef605e4346a140be411e03f9ac/FLAG88cee6015 [2025-03-04 09:57:25,309 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 09:57:25,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe027_power.opt.i [2025-03-04 09:57:25,330 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a55943c3/7e0bd5ef605e4346a140be411e03f9ac/FLAG88cee6015 [2025-03-04 09:57:25,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a55943c3/7e0bd5ef605e4346a140be411e03f9ac [2025-03-04 09:57:25,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 09:57:25,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 09:57:25,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 09:57:25,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 09:57:25,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 09:57:25,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6877c3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25, skipping insertion in model container [2025-03-04 09:57:25,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 09:57:25,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:57:25,732 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 09:57:25,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:57:25,820 INFO L204 MainTranslator]: Completed translation [2025-03-04 09:57:25,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25 WrapperNode [2025-03-04 09:57:25,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 09:57:25,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 09:57:25,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 09:57:25,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 09:57:25,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,858 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 183 [2025-03-04 09:57:25,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 09:57:25,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 09:57:25,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 09:57:25,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 09:57:25,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,891 INFO L175 MemorySlicer]: Split 26 memory accesses to 2 slices as follows [2, 24]. 92 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2025-03-04 09:57:25,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,907 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 09:57:25,921 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 09:57:25,921 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 09:57:25,921 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 09:57:25,922 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (1/1) ... [2025-03-04 09:57:25,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:57:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:57:25,954 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 09:57:25,956 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 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-03-04 09:57:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-03-04 09:57:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-03-04 09:57:25,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-03-04 09:57:25,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2025-03-04 09:57:25,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 09:57:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 09:57:25,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 09:57:25,975 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 09:57:26,083 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 09:57:26,084 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 09:57:26,564 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 09:57:26,565 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 09:57:26,993 WARN L170 LargeBlockEncoding]: Complex 2:9 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-03-04 09:57:27,020 WARN L170 LargeBlockEncoding]: Complex 2:9 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-03-04 09:57:27,047 WARN L170 LargeBlockEncoding]: Complex 2:9 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-03-04 09:57:27,133 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 09:57:27,133 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 09:57:27,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:57:27 BoogieIcfgContainer [2025-03-04 09:57:27,135 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 09:57:27,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 09:57:27,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 09:57:27,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 09:57:27,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 09:57:25" (1/3) ... [2025-03-04 09:57:27,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42be8280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:57:27, skipping insertion in model container [2025-03-04 09:57:27,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:57:25" (2/3) ... [2025-03-04 09:57:27,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42be8280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:57:27, skipping insertion in model container [2025-03-04 09:57:27,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:57:27" (3/3) ... [2025-03-04 09:57:27,143 INFO L128 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2025-03-04 09:57:27,156 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 09:57:27,160 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe027_power.opt.i that has 5 procedures, 96 locations, 1 initial locations, 0 loop locations, and 49 error locations. [2025-03-04 09:57:27,160 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 09:57:27,382 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 09:57:27,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 264 flow [2025-03-04 09:57:27,508 INFO L124 PetriNetUnfolderBase]: 29/120 cut-off events. [2025-03-04 09:57:27,510 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:57:27,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 29/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 438 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 124. Up to 4 conditions per place. [2025-03-04 09:57:27,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 264 flow [2025-03-04 09:57:27,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 120 transitions, 252 flow [2025-03-04 09:57:27,528 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 09:57:27,537 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;@48e640cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 09:57:27,537 INFO L334 AbstractCegarLoop]: Starting to check reachability of 94 error locations. [2025-03-04 09:57:27,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 09:57:27,544 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2025-03-04 09:57:27,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 09:57:27,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:57:27,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-04 09:57:27,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2025-03-04 09:57:27,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:57:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash 999463223, now seen corresponding path program 1 times [2025-03-04 09:57:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:57:27,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132970544] [2025-03-04 09:57:27,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:57:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:57:27,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 09:57:27,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 09:57:27,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:57:27,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:57:27,835 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 09:57:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:57:27,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132970544] [2025-03-04 09:57:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132970544] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:57:27,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:57:27,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 09:57:27,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758116347] [2025-03-04 09:57:27,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:57:27,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:57:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:57:27,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:57:27,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:57:27,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 124 [2025-03-04 09:57:27,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 252 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) [2025-03-04 09:57:27,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:57:27,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 124 [2025-03-04 09:57:27,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 09:57:51,450 INFO L124 PetriNetUnfolderBase]: 187915/252695 cut-off events. [2025-03-04 09:57:51,451 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-03-04 09:57:52,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492279 conditions, 252695 events. 187915/252695 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 8427. Compared 1786106 event pairs, 171115 based on Foata normal form. 7056/171700 useless extension candidates. Maximal degree in co-relation 492267. Up to 238442 conditions per place. [2025-03-04 09:57:53,077 INFO L140 encePairwiseOnDemand]: 63/124 looper letters, 50 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2025-03-04 09:57:53,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 59 transitions, 232 flow [2025-03-04 09:57:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:57:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 09:57:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2025-03-04 09:57:53,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2025-03-04 09:57:53,090 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 252 flow. Second operand 3 states and 147 transitions. [2025-03-04 09:57:53,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 59 transitions, 232 flow [2025-03-04 09:57:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 09:57:53,115 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 128 flow [2025-03-04 09:57:53,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2025-03-04 09:57:53,121 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -37 predicate places. [2025-03-04 09:57:53,121 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 128 flow [2025-03-04 09:57:53,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2025-03-04 09:57:53,121 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 09:57:53,121 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-04 09:57:53,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 09:57:53,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2025-03-04 09:57:53,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:57:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 999463224, now seen corresponding path program 1 times [2025-03-04 09:57:53,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 09:57:53,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038715038] [2025-03-04 09:57:53,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:57:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 09:57:53,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 09:57:53,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 09:57:53,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:57:53,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:57:53,268 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 09:57:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 09:57:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038715038] [2025-03-04 09:57:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038715038] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:57:53,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:57:53,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 09:57:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981011199] [2025-03-04 09:57:53,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:57:53,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:57:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 09:57:53,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:57:53,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:57:53,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 124 [2025-03-04 09:57:53,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 128 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) [2025-03-04 09:57:53,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 09:57:53,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 124 [2025-03-04 09:57:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand