./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2018/Problem12.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc374151ad7cbf5164d124b31f1469c11fb09f7ea899f596b5df5ff69b5f22f3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 11:14:57,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 11:14:57,928 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 11:14:57,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 11:14:57,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 11:14:57,954 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 11:14:57,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 11:14:57,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 11:14:57,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 11:14:57,957 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 11:14:57,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 11:14:57,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 11:14:57,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 11:14:57,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 11:14:57,958 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 11:14:57,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 11:14:57,959 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 11:14:57,959 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 11:14:57,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 11:14:57,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 11:14:57,961 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc374151ad7cbf5164d124b31f1469c11fb09f7ea899f596b5df5ff69b5f22f3 [2025-03-03 11:14:58,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 11:14:58,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 11:14:58,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 11:14:58,194 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 11:14:58,194 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 11:14:58,196 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem12.c [2025-03-03 11:14:59,306 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f63a599e/c03212fc904b44ae829e2a81bbaeaf11/FLAGf060a700c [2025-03-03 11:14:59,910 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 11:14:59,911 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c [2025-03-03 11:14:59,968 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f63a599e/c03212fc904b44ae829e2a81bbaeaf11/FLAGf060a700c [2025-03-03 11:15:00,385 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f63a599e/c03212fc904b44ae829e2a81bbaeaf11 [2025-03-03 11:15:00,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 11:15:00,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 11:15:00,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 11:15:00,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 11:15:00,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 11:15:00,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 11:15:00" (1/1) ... [2025-03-03 11:15:00,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a06d7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:00, skipping insertion in model container [2025-03-03 11:15:00,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 11:15:00" (1/1) ... [2025-03-03 11:15:00,496 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 11:15:00,636 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[778,791] [2025-03-03 11:15:00,649 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[817,830] [2025-03-03 11:15:03,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 11:15:03,244 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 11:15:03,250 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[778,791] [2025-03-03 11:15:03,252 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[817,830] [2025-03-03 11:15:03,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 11:15:03,878 INFO L204 MainTranslator]: Completed translation [2025-03-03 11:15:03,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03 WrapperNode [2025-03-03 11:15:03,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 11:15:03,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 11:15:03,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 11:15:03,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 11:15:03,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:03,991 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:05,164 INFO L138 Inliner]: procedures = 351, calls = 5526, calls flagged for inlining = 234, calls inlined = 234, statements flattened = 43806 [2025-03-03 11:15:05,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 11:15:05,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 11:15:05,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 11:15:05,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 11:15:05,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:05,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:05,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:05,888 INFO L175 MemorySlicer]: Split 5144 memory accesses to 26 slices as follows [226, 30, 244, 32, 96, 264, 58, 2, 601, 38, 558, 93, 58, 68, 56, 257, 92, 540, 28, 82, 520, 353, 149, 75, 83, 541]. 12 percent of accesses are in the largest equivalence class. The 304 initializations are split as follows [18, 18, 18, 18, 8, 18, 8, 2, 0, 18, 8, 8, 8, 18, 8, 18, 8, 8, 18, 18, 8, 8, 8, 8, 18, 8]. The 16 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. [2025-03-03 11:15:05,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:05,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:06,565 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:06,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:06,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:06,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:07,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 11:15:07,359 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 11:15:07,360 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 11:15:07,360 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 11:15:07,361 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (1/1) ... [2025-03-03 11:15:07,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 11:15:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 11:15:07,391 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) [2025-03-03 11:15:07,394 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 [2025-03-03 11:15:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2025-03-03 11:15:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#9 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#10 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#11 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#12 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#13 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#14 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#15 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#16 [2025-03-03 11:15:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#17 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#18 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#19 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#20 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#21 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#22 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#23 [2025-03-03 11:15:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#24 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#25 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#14 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#15 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#16 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#17 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#18 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#19 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#20 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#21 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#22 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#23 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#24 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#25 [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 11:15:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2025-03-03 11:15:07,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2025-03-03 11:15:07,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#20 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#21 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#22 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#23 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#24 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#25 [2025-03-03 11:15:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 11:15:07,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 11:15:08,527 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 11:15:08,528 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 11:16:10,964 INFO L? ?]: Removed 8776 outVars from TransFormulas that were not future-live. [2025-03-03 11:16:10,964 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 11:16:11,060 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 11:16:11,061 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 11:16:11,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 11:16:11 BoogieIcfgContainer [2025-03-03 11:16:11,061 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 11:16:11,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 11:16:11,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 11:16:11,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 11:16:11,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 11:15:00" (1/3) ... [2025-03-03 11:16:11,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331d799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 11:16:11, skipping insertion in model container [2025-03-03 11:16:11,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 11:15:03" (2/3) ... [2025-03-03 11:16:11,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331d799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 11:16:11, skipping insertion in model container [2025-03-03 11:16:11,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 11:16:11" (3/3) ... [2025-03-03 11:16:11,068 INFO L128 eAbstractionObserver]: Analyzing ICFG Problem12.c [2025-03-03 11:16:11,080 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 11:16:11,084 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem12.c that has 3 procedures, 9313 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2025-03-03 11:16:11,241 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 11:16:11,248 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4baba6a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 11:16:11,248 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-03-03 11:16:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 9313 states, 9208 states have (on average 1.55125977410947) internal successors, (14284), 9210 states have internal predecessors, (14284), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2025-03-03 11:16:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 11:16:11,285 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 11:16:11,285 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 11:16:11,286 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 11:16:11,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 11:16:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2103621616, now seen corresponding path program 1 times [2025-03-03 11:16:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 11:16:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138063857] [2025-03-03 11:16:11,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 11:16:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 11:16:11,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 11:16:11,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 11:16:11,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 11:16:11,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 11:16:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 11:16:11,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 11:16:11,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138063857] [2025-03-03 11:16:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138063857] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 11:16:11,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 11:16:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 11:16:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745564525] [2025-03-03 11:16:11,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 11:16:11,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 11:16:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 11:16:11,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 11:16:11,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 11:16:11,800 INFO L87 Difference]: Start difference. First operand has 9313 states, 9208 states have (on average 1.55125977410947) internal successors, (14284), 9210 states have internal predecessors, (14284), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 11:16:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 11:16:12,123 INFO L93 Difference]: Finished difference Result 18523 states and 28869 transitions. [2025-03-03 11:16:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 11:16:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-03 11:16:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 11:16:12,167 INFO L225 Difference]: With dead ends: 18523 [2025-03-03 11:16:12,168 INFO L226 Difference]: Without dead ends: 9209 [2025-03-03 11:16:12,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 11:16:12,192 INFO L435 NwaCegarLoop]: 14275 mSDtfsCounter, 1 mSDsluCounter, 28539 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42814 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 11:16:12,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42814 Invalid, 20 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 11:16:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2025-03-03 11:16:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 9209. [2025-03-03 11:16:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9107 states have (on average 1.5568244207752278) internal successors, (14178), 9206 states have internal predecessors, (14178), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 11:16:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 14278 transitions. [2025-03-03 11:16:12,461 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 14278 transitions. Word has length 39 [2025-03-03 11:16:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 11:16:12,463 INFO L471 AbstractCegarLoop]: Abstraction has 9209 states and 14278 transitions. [2025-03-03 11:16:12,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 11:16:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 14278 transitions. [2025-03-03 11:16:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 11:16:12,469 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 11:16:12,469 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 11:16:12,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 11:16:12,469 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 11:16:12,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 11:16:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1680811503, now seen corresponding path program 1 times [2025-03-03 11:16:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 11:16:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951163676] [2025-03-03 11:16:12,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 11:16:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 11:16:12,522 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 11:16:12,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 11:16:12,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 11:16:12,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 11:16:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 11:16:12,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 11:16:12,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951163676] [2025-03-03 11:16:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951163676] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 11:16:12,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 11:16:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 11:16:12,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376673560] [2025-03-03 11:16:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 11:16:12,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 11:16:12,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 11:16:12,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 11:16:12,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 11:16:12,776 INFO L87 Difference]: Start difference. First operand 9209 states and 14278 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 11:16:17,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-03 11:16:19,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-03 11:16:23,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-03 11:16:24,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-03 11:16:28,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-03 11:16:33,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []