./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 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2018/Problem12.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! 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-?-551b009-m [2025-01-09 00:29:12,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 00:29:12,228 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 00:29:12,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 00:29:12,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 00:29:12,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 00:29:12,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 00:29:12,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 00:29:12,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 00:29:12,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 00:29:12,257 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 00:29:12,257 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 00:29:12,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 00:29:12,258 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 00:29:12,258 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 00:29:12,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 00:29:12,258 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 00:29:12,259 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 [2025-01-09 00:29:12,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 00:29:12,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 00:29:12,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 00:29:12,505 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 00:29:12,506 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 00:29:12,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem12.c [2025-01-09 00:29:13,689 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/babc585b0/4e2e91d990ef4bea90d3b02f5d666d74/FLAGca4201eba [2025-01-09 00:29:14,205 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 00:29:14,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c [2025-01-09 00:29:14,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/babc585b0/4e2e91d990ef4bea90d3b02f5d666d74/FLAGca4201eba [2025-01-09 00:29:14,753 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/babc585b0/4e2e91d990ef4bea90d3b02f5d666d74 [2025-01-09 00:29:14,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 00:29:14,755 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 00:29:14,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 00:29:14,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 00:29:14,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 00:29:14,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 12:29:14" (1/1) ... [2025-01-09 00:29:14,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cafca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:14, skipping insertion in model container [2025-01-09 00:29:14,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 12:29:14" (1/1) ... [2025-01-09 00:29:14,875 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 00:29:15,047 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[778,791] [2025-01-09 00:29:15,058 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[817,830] [2025-01-09 00:29:17,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 00:29:17,076 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 00:29:17,084 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[778,791] [2025-01-09 00:29:17,084 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem12.c[817,830] [2025-01-09 00:29:17,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 00:29:17,861 INFO L204 MainTranslator]: Completed translation [2025-01-09 00:29:17,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17 WrapperNode [2025-01-09 00:29:17,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 00:29:17,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 00:29:17,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 00:29:17,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 00:29:17,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:18,168 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:19,560 INFO L138 Inliner]: procedures = 351, calls = 5526, calls flagged for inlining = 234, calls inlined = 234, statements flattened = 43806 [2025-01-09 00:29:19,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 00:29:19,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 00:29:19,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 00:29:19,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 00:29:19,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:19,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:19,850 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:20,406 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]. [2025-01-09 00:29:20,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:20,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:20,875 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:20,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:20,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:21,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:21,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:21,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 00:29:21,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 00:29:21,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 00:29:21,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 00:29:21,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (1/1) ... [2025-01-09 00:29:21,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 00:29:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 00:29:21,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 00:29:21,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2025-01-09 00:29:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#9 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#10 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#11 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#12 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#13 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#14 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#15 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#16 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#17 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#18 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#19 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#20 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#21 [2025-01-09 00:29:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#22 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#23 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#24 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#25 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 00:29:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 00:29:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 00:29:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-01-09 00:29:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#14 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#15 [2025-01-09 00:29:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#16 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#17 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#18 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#19 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#20 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#21 [2025-01-09 00:29:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#22 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#23 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#24 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#25 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2025-01-09 00:29:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2025-01-09 00:29:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-01-09 00:29:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2025-01-09 00:29:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#20 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#21 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#22 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#23 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#24 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#25 [2025-01-09 00:29:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 00:29:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 00:29:22,563 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 00:29:22,564 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 00:30:37,461 INFO L? ?]: Removed 8776 outVars from TransFormulas that were not future-live. [2025-01-09 00:30:37,461 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 00:30:37,562 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 00:30:37,563 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 00:30:37,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 12:30:37 BoogieIcfgContainer [2025-01-09 00:30:37,563 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 00:30:37,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 00:30:37,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 00:30:37,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 00:30:37,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 12:29:14" (1/3) ... [2025-01-09 00:30:37,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e65d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 12:30:37, skipping insertion in model container [2025-01-09 00:30:37,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:29:17" (2/3) ... [2025-01-09 00:30:37,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e65d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 12:30:37, skipping insertion in model container [2025-01-09 00:30:37,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 12:30:37" (3/3) ... [2025-01-09 00:30:37,570 INFO L128 eAbstractionObserver]: Analyzing ICFG Problem12.c [2025-01-09 00:30:37,582 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 00:30:37,584 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. [2025-01-09 00:30:37,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 00:30:37,818 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;@5f7366e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 00:30:37,819 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-01-09 00:30:37,842 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) [2025-01-09 00:30:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 00:30:37,859 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 00:30:37,859 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] [2025-01-09 00:30:37,859 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 00:30:37,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 00:30:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1519026894, now seen corresponding path program 1 times [2025-01-09 00:30:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 00:30:37,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108522415] [2025-01-09 00:30:37,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 00:30:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 00:30:38,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 00:30:38,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 00:30:38,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 00:30:38,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 00:30:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 00:30:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 00:30:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108522415] [2025-01-09 00:30:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108522415] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 00:30:38,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 00:30:38,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 00:30:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263659950] [2025-01-09 00:30:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 00:30:38,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 00:30:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 00:30:38,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 00:30:38,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 00:30:38,448 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) [2025-01-09 00:30:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 00:30:38,832 INFO L93 Difference]: Finished difference Result 18523 states and 28869 transitions. [2025-01-09 00:30:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 00:30:38,834 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 [2025-01-09 00:30:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 00:30:38,880 INFO L225 Difference]: With dead ends: 18523 [2025-01-09 00:30:38,880 INFO L226 Difference]: Without dead ends: 9209 [2025-01-09 00:30:38,902 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 [2025-01-09 00:30:38,903 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 [2025-01-09 00:30:38,905 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] [2025-01-09 00:30:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2025-01-09 00:30:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 9209. [2025-01-09 00:30:39,127 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) [2025-01-09 00:30:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 14278 transitions. [2025-01-09 00:30:39,167 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 14278 transitions. Word has length 39 [2025-01-09 00:30:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 00:30:39,167 INFO L471 AbstractCegarLoop]: Abstraction has 9209 states and 14278 transitions. [2025-01-09 00:30:39,167 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) [2025-01-09 00:30:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 14278 transitions. [2025-01-09 00:30:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 00:30:39,175 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 00:30:39,175 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] [2025-01-09 00:30:39,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 00:30:39,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 00:30:39,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 00:30:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 497958540, now seen corresponding path program 1 times [2025-01-09 00:30:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 00:30:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661329429] [2025-01-09 00:30:39,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 00:30:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 00:30:39,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 00:30:39,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 00:30:39,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 00:30:39,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 00:30:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 00:30:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 00:30:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661329429] [2025-01-09 00:30:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661329429] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 00:30:39,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 00:30:39,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 00:30:39,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938505649] [2025-01-09 00:30:39,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 00:30:39,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 00:30:39,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 00:30:39,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 00:30:39,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 00:30:39,428 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) [2025-01-09 00:30:46,062 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 []