./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.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 dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:01:25,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:01:25,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:01:25,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:01:25,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:01:25,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:01:25,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:01:25,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:01:25,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:01:25,101 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:01:25,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:01:25,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:01:25,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:01:25,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:01:25,102 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:01:25,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:01:25,103 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:01:25,104 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:01:25,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:01:25,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:01:25,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:01:25,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:25,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:01:25,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:01:25,105 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:01:25,105 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 -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2025-02-05 16:01:25,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:01:25,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:01:25,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:01:25,339 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:01:25,339 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:01:25,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-02-05 16:01:26,489 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/468711964/70a12121abd24375be80cdcf386f5a00/FLAG84bed6493 [2025-02-05 16:01:26,676 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:01:26,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-02-05 16:01:26,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/468711964/70a12121abd24375be80cdcf386f5a00/FLAG84bed6493 [2025-02-05 16:01:26,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/468711964/70a12121abd24375be80cdcf386f5a00 [2025-02-05 16:01:26,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:01:26,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:01:26,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:26,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:01:26,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:01:26,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af07f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26, skipping insertion in model container [2025-02-05 16:01:26,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,716 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:01:26,822 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/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2025-02-05 16:01:26,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:26,850 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:01:26,857 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/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2025-02-05 16:01:26,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:26,879 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:01:26,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26 WrapperNode [2025-02-05 16:01:26,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:26,881 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:26,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:01:26,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:01:26,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,903 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2025-02-05 16:01:26,903 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:26,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:01:26,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:01:26,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:01:26,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,914 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,928 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 6, 5, 7, 6, 6, 6]. 18 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 2, 1, 2, 2, 2]. [2025-02-05 16:01:26,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,934 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:01:26,940 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:01:26,940 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:01:26,940 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:01:26,940 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (1/1) ... [2025-02-05 16:01:26,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:26,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 16:01:26,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 16:01:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2025-02-05 16:01:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2025-02-05 16:01:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:01:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2025-02-05 16:01:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2025-02-05 16:01:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2025-02-05 16:01:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2025-02-05 16:01:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:01:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2025-02-05 16:01:26,991 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2025-02-05 16:01:26,991 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:01:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:01:26,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-02-05 16:01:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:01:27,106 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:01:27,108 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:01:27,305 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L130: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset;call ULTIMATE.dealloc(main_~#d~0#1.base, main_~#d~0#1.offset);havoc main_~#d~0#1.base, main_~#d~0#1.offset;call ULTIMATE.dealloc(main_~#e~0#1.base, main_~#e~0#1.offset);havoc main_~#e~0#1.base, main_~#e~0#1.offset;call ULTIMATE.dealloc(main_~#uint32_max~0#1.base, main_~#uint32_max~0#1.offset);havoc main_~#uint32_max~0#1.base, main_~#uint32_max~0#1.offset; [2025-02-05 16:01:27,327 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-02-05 16:01:27,327 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:01:27,337 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:01:27,337 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:01:27,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:27 BoogieIcfgContainer [2025-02-05 16:01:27,338 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:01:27,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:01:27,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:01:27,343 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:01:27,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:01:26" (1/3) ... [2025-02-05 16:01:27,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6216a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:27, skipping insertion in model container [2025-02-05 16:01:27,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:26" (2/3) ... [2025-02-05 16:01:27,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6216a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:27, skipping insertion in model container [2025-02-05 16:01:27,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:27" (3/3) ... [2025-02-05 16:01:27,345 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2025-02-05 16:01:27,354 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:01:27,355 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_deep-nested.c that has 6 procedures, 51 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:01:27,389 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:01:27,396 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;@6e3087a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:01:27,396 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:01:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 16:01:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 16:01:27,402 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:27,403 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] [2025-02-05 16:01:27,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:27,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -717232106, now seen corresponding path program 1 times [2025-02-05 16:01:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639117678] [2025-02-05 16:01:27,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:27,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 16:01:27,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 16:01:27,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:27,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639117678] [2025-02-05 16:01:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639117678] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-02-05 16:01:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812410260] [2025-02-05 16:01:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:28,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 16:01:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:28,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 16:01:28,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:01:28,556 INFO L87 Difference]: Start difference. First operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:28,956 INFO L93 Difference]: Finished difference Result 115 states and 161 transitions. [2025-02-05 16:01:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 16:01:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-05 16:01:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:28,963 INFO L225 Difference]: With dead ends: 115 [2025-02-05 16:01:28,963 INFO L226 Difference]: Without dead ends: 61 [2025-02-05 16:01:28,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2025-02-05 16:01:28,967 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 59 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:28,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 437 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:01:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-05 16:01:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2025-02-05 16:01:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 46 states have internal predecessors, (55), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-05 16:01:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2025-02-05 16:01:28,999 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 26 [2025-02-05 16:01:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:28,999 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2025-02-05 16:01:29,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2025-02-05 16:01:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 16:01:29,003 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:29,004 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:29,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:01:29,004 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:29,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash -509063859, now seen corresponding path program 1 times [2025-02-05 16:01:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:29,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208134667] [2025-02-05 16:01:29,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:29,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-05 16:01:29,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 16:01:29,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:29,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:29,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208134667] [2025-02-05 16:01:29,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208134667] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485029225] [2025-02-05 16:01:29,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:29,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:29,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 16:01:30,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-05 16:01:30,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 16:01:30,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:30,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:30,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 170 conjuncts are in the unsatisfiable core [2025-02-05 16:01:30,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:30,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:30,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:30,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 16:01:30,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:31,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2025-02-05 16:01:31,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2025-02-05 16:01:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485029225] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:31,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 11] total 41 [2025-02-05 16:01:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637671754] [2025-02-05 16:01:31,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:31,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 16:01:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:31,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 16:01:31,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 16:01:31,374 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 11 states have call successors, (15), 10 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:33,831 INFO L93 Difference]: Finished difference Result 273 states and 395 transitions. [2025-02-05 16:01:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-05 16:01:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 11 states have call successors, (15), 10 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-02-05 16:01:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:33,834 INFO L225 Difference]: With dead ends: 273 [2025-02-05 16:01:33,834 INFO L226 Difference]: Without dead ends: 219 [2025-02-05 16:01:33,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1001, Invalid=7741, Unknown=0, NotChecked=0, Total=8742 [2025-02-05 16:01:33,840 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 416 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:33,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1002 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-05 16:01:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-02-05 16:01:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 185. [2025-02-05 16:01:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 159 states have internal predecessors, (193), 23 states have call successors, (23), 18 states have call predecessors, (23), 17 states have return successors, (32), 17 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-05 16:01:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 248 transitions. [2025-02-05 16:01:33,874 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 248 transitions. Word has length 38 [2025-02-05 16:01:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:33,875 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 248 transitions. [2025-02-05 16:01:33,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 11 states have call successors, (15), 10 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 248 transitions. [2025-02-05 16:01:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 16:01:33,878 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:33,878 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:33,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:34,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:34,083 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:34,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1751295754, now seen corresponding path program 1 times [2025-02-05 16:01:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135266459] [2025-02-05 16:01:34,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:34,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 16:01:34,144 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 16:01:34,144 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:34,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 16:01:34,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:34,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135266459] [2025-02-05 16:01:34,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135266459] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:34,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:34,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-02-05 16:01:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830458390] [2025-02-05 16:01:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:34,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 16:01:34,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:34,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 16:01:34,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:01:34,657 INFO L87 Difference]: Start difference. First operand 185 states and 248 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:34,987 INFO L93 Difference]: Finished difference Result 394 states and 547 transitions. [2025-02-05 16:01:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 16:01:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2025-02-05 16:01:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:34,992 INFO L225 Difference]: With dead ends: 394 [2025-02-05 16:01:34,992 INFO L226 Difference]: Without dead ends: 209 [2025-02-05 16:01:34,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2025-02-05 16:01:34,995 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:34,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 333 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:01:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-02-05 16:01:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2025-02-05 16:01:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 147 states have (on average 1.3129251700680271) internal successors, (193), 159 states have internal predecessors, (193), 23 states have call successors, (23), 18 states have call predecessors, (23), 20 states have return successors, (36), 17 states have call predecessors, (36), 21 states have call successors, (36) [2025-02-05 16:01:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 252 transitions. [2025-02-05 16:01:35,020 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 252 transitions. Word has length 47 [2025-02-05 16:01:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:35,020 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 252 transitions. [2025-02-05 16:01:35,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 252 transitions. [2025-02-05 16:01:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 16:01:35,025 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:35,026 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:35,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 16:01:35,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:35,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash 578296256, now seen corresponding path program 1 times [2025-02-05 16:01:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:35,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702858226] [2025-02-05 16:01:35,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:35,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:35,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 16:01:35,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 16:01:35,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:35,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 16:01:36,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702858226] [2025-02-05 16:01:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702858226] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340204339] [2025-02-05 16:01:36,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:36,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:36,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:36,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:36,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 16:01:36,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 16:01:36,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 16:01:36,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:36,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:36,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 16:01:36,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:36,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:36,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 16:01:36,324 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:01:36,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340204339] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:36,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:36,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 26 [2025-02-05 16:01:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069653460] [2025-02-05 16:01:36,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:36,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 16:01:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:36,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 16:01:36,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2025-02-05 16:01:36,326 INFO L87 Difference]: Start difference. First operand 191 states and 252 transitions. Second operand has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:36,474 INFO L93 Difference]: Finished difference Result 319 states and 431 transitions. [2025-02-05 16:01:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:01:36,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2025-02-05 16:01:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:36,476 INFO L225 Difference]: With dead ends: 319 [2025-02-05 16:01:36,476 INFO L226 Difference]: Without dead ends: 196 [2025-02-05 16:01:36,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2025-02-05 16:01:36,477 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 31 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:36,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 356 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-02-05 16:01:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2025-02-05 16:01:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 159 states have internal predecessors, (192), 23 states have call successors, (23), 18 states have call predecessors, (23), 20 states have return successors, (36), 17 states have call predecessors, (36), 21 states have call successors, (36) [2025-02-05 16:01:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 251 transitions. [2025-02-05 16:01:36,499 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 251 transitions. Word has length 59 [2025-02-05 16:01:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:36,500 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 251 transitions. [2025-02-05 16:01:36,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 251 transitions. [2025-02-05 16:01:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 16:01:36,506 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:36,506 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:36,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 16:01:36,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:36,707 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:36,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1271397953, now seen corresponding path program 1 times [2025-02-05 16:01:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802287946] [2025-02-05 16:01:36,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:36,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 16:01:36,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 16:01:36,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:36,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 16:01:37,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802287946] [2025-02-05 16:01:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802287946] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344171600] [2025-02-05 16:01:37,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:37,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:37,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:37,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 16:01:37,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 16:01:37,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 16:01:37,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:37,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:37,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 174 conjuncts are in the unsatisfiable core [2025-02-05 16:01:37,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:37,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:37,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:37,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-02-05 16:01:37,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:01:37,959 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:01:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344171600] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2025-02-05 16:01:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446733308] [2025-02-05 16:01:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:37,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 16:01:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:37,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 16:01:37,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2025-02-05 16:01:37,960 INFO L87 Difference]: Start difference. First operand 191 states and 251 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:38,333 INFO L93 Difference]: Finished difference Result 438 states and 576 transitions. [2025-02-05 16:01:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:01:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2025-02-05 16:01:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:38,335 INFO L225 Difference]: With dead ends: 438 [2025-02-05 16:01:38,335 INFO L226 Difference]: Without dead ends: 313 [2025-02-05 16:01:38,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2025-02-05 16:01:38,337 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:38,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 44 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:01:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2025-02-05 16:01:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 305. [2025-02-05 16:01:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 239 states have (on average 1.3138075313807531) internal successors, (314), 257 states have internal predecessors, (314), 34 states have call successors, (34), 28 states have call predecessors, (34), 31 states have return successors, (53), 25 states have call predecessors, (53), 32 states have call successors, (53) [2025-02-05 16:01:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 401 transitions. [2025-02-05 16:01:38,363 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 401 transitions. Word has length 59 [2025-02-05 16:01:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:38,363 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 401 transitions. [2025-02-05 16:01:38,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 401 transitions. [2025-02-05 16:01:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-05 16:01:38,365 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:38,365 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:38,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 16:01:38,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:38,565 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:38,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1160736368, now seen corresponding path program 1 times [2025-02-05 16:01:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:38,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588057641] [2025-02-05 16:01:38,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:38,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 16:01:38,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:01:38,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:38,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 16:01:39,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588057641] [2025-02-05 16:01:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588057641] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460456853] [2025-02-05 16:01:39,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:39,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:39,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 16:01:39,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 16:01:39,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:01:39,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:39,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:39,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 187 conjuncts are in the unsatisfiable core [2025-02-05 16:01:39,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:39,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:39,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:39,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:39,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 16:01:40,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460456853] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:40,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:01:40,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 32 [2025-02-05 16:01:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322901667] [2025-02-05 16:01:40,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:40,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 16:01:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:40,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 16:01:40,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 16:01:40,952 INFO L87 Difference]: Start difference. First operand 305 states and 401 transitions. Second operand has 32 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:01:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:42,193 INFO L93 Difference]: Finished difference Result 837 states and 1149 transitions. [2025-02-05 16:01:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 16:01:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2025-02-05 16:01:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:42,196 INFO L225 Difference]: With dead ends: 837 [2025-02-05 16:01:42,196 INFO L226 Difference]: Without dead ends: 513 [2025-02-05 16:01:42,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=329, Invalid=4641, Unknown=0, NotChecked=0, Total=4970 [2025-02-05 16:01:42,198 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 126 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:42,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 590 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 16:01:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2025-02-05 16:01:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 309. [2025-02-05 16:01:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 244 states have (on average 1.290983606557377) internal successors, (315), 255 states have internal predecessors, (315), 34 states have call successors, (34), 31 states have call predecessors, (34), 30 states have return successors, (56), 27 states have call predecessors, (56), 32 states have call successors, (56) [2025-02-05 16:01:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 405 transitions. [2025-02-05 16:01:42,230 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 405 transitions. Word has length 61 [2025-02-05 16:01:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:42,230 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 405 transitions. [2025-02-05 16:01:42,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:01:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 405 transitions. [2025-02-05 16:01:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-05 16:01:42,231 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:42,231 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:42,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 16:01:42,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 16:01:42,432 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:42,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -841180811, now seen corresponding path program 2 times [2025-02-05 16:01:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373429462] [2025-02-05 16:01:42,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:42,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-05 16:01:42,469 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:01:42,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:42,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:43,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373429462] [2025-02-05 16:01:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373429462] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500457684] [2025-02-05 16:01:43,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:43,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 16:01:43,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-05 16:01:43,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:01:43,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:43,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 167 conjuncts are in the unsatisfiable core [2025-02-05 16:01:43,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:43,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:43,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:43,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:43,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:44,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-05 16:01:44,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:44,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:01:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 16:01:44,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:44,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-02-05 16:01:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500457684] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:45,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:01:45,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2025-02-05 16:01:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465304814] [2025-02-05 16:01:45,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:45,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-05 16:01:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:45,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-05 16:01:45,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3257, Unknown=0, NotChecked=0, Total=3422 [2025-02-05 16:01:45,628 INFO L87 Difference]: Start difference. First operand 309 states and 405 transitions. Second operand has 46 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 33 states have internal predecessors, (102), 17 states have call successors, (19), 15 states have call predecessors, (19), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 16:01:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:49,868 INFO L93 Difference]: Finished difference Result 1195 states and 1671 transitions. [2025-02-05 16:01:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-02-05 16:01:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 33 states have internal predecessors, (102), 17 states have call successors, (19), 15 states have call predecessors, (19), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 75 [2025-02-05 16:01:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:49,874 INFO L225 Difference]: With dead ends: 1195 [2025-02-05 16:01:49,874 INFO L226 Difference]: Without dead ends: 883 [2025-02-05 16:01:49,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1057, Invalid=14443, Unknown=0, NotChecked=0, Total=15500 [2025-02-05 16:01:49,880 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 388 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:49,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1305 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 16:01:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2025-02-05 16:01:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 692. [2025-02-05 16:01:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 562 states have (on average 1.2864768683274022) internal successors, (723), 592 states have internal predecessors, (723), 72 states have call successors, (72), 62 states have call predecessors, (72), 57 states have return successors, (135), 46 states have call predecessors, (135), 70 states have call successors, (135) [2025-02-05 16:01:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 930 transitions. [2025-02-05 16:01:49,943 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 930 transitions. Word has length 75 [2025-02-05 16:01:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:49,944 INFO L471 AbstractCegarLoop]: Abstraction has 692 states and 930 transitions. [2025-02-05 16:01:49,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 33 states have internal predecessors, (102), 17 states have call successors, (19), 15 states have call predecessors, (19), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 16:01:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 930 transitions. [2025-02-05 16:01:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 16:01:49,949 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:49,949 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:49,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 16:01:50,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:50,150 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:50,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash -221329005, now seen corresponding path program 1 times [2025-02-05 16:01:50,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:50,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905722058] [2025-02-05 16:01:50,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:50,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:50,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 16:01:50,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:01:50,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:50,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 16:01:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905722058] [2025-02-05 16:01:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905722058] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542159100] [2025-02-05 16:01:50,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:50,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:50,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 16:01:50,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 16:01:50,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:01:50,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:50,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:50,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 199 conjuncts are in the unsatisfiable core [2025-02-05 16:01:50,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:50,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:51,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:01:51,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:51,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:51,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:51,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:01:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 16:01:51,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 16:01:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542159100] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:52,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:52,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27, 22] total 57 [2025-02-05 16:01:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446461222] [2025-02-05 16:01:52,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:52,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 16:01:52,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:52,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 16:01:52,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3007, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 16:01:52,492 INFO L87 Difference]: Start difference. First operand 692 states and 930 transitions. Second operand has 57 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 40 states have internal predecessors, (131), 26 states have call successors, (37), 20 states have call predecessors, (37), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-05 16:02:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:00,106 INFO L93 Difference]: Finished difference Result 3341 states and 5062 transitions. [2025-02-05 16:02:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2025-02-05 16:02:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 40 states have internal predecessors, (131), 26 states have call successors, (37), 20 states have call predecessors, (37), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) Word has length 81 [2025-02-05 16:02:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:00,119 INFO L225 Difference]: With dead ends: 3341 [2025-02-05 16:02:00,119 INFO L226 Difference]: Without dead ends: 2671 [2025-02-05 16:02:00,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7718 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1441, Invalid=28661, Unknown=0, NotChecked=0, Total=30102 [2025-02-05 16:02:00,128 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 665 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 6399 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 6685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 6399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:00,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 858 Invalid, 6685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 6399 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2025-02-05 16:02:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2025-02-05 16:02:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2426. [2025-02-05 16:02:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2015 states have (on average 1.2674937965260547) internal successors, (2554), 2148 states have internal predecessors, (2554), 248 states have call successors, (248), 162 states have call predecessors, (248), 162 states have return successors, (502), 128 states have call predecessors, (502), 240 states have call successors, (502) [2025-02-05 16:02:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3304 transitions. [2025-02-05 16:02:00,327 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3304 transitions. Word has length 81 [2025-02-05 16:02:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:00,327 INFO L471 AbstractCegarLoop]: Abstraction has 2426 states and 3304 transitions. [2025-02-05 16:02:00,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 40 states have internal predecessors, (131), 26 states have call successors, (37), 20 states have call predecessors, (37), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-05 16:02:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3304 transitions. [2025-02-05 16:02:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-02-05 16:02:00,331 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:00,331 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:00,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:00,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 16:02:00,536 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:00,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1144935021, now seen corresponding path program 3 times [2025-02-05 16:02:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202739421] [2025-02-05 16:02:00,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:00,552 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 4 equivalence classes. [2025-02-05 16:02:00,596 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 73 of 87 statements. [2025-02-05 16:02:00,596 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 16:02:00,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 75 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:02:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202739421] [2025-02-05 16:02:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202739421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957130402] [2025-02-05 16:02:01,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:01,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:01,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:01,547 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 16:02:01,650 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 4 equivalence classes. [2025-02-05 16:02:01,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 73 of 87 statements. [2025-02-05 16:02:01,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 16:02:01,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:01,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 197 conjuncts are in the unsatisfiable core [2025-02-05 16:02:01,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:01,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:02,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:02:02,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 71 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-05 16:02:02,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:02,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-02-05 16:02:02,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-02-05 16:02:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 91 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-05 16:02:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957130402] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:03,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:03,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 25] total 67 [2025-02-05 16:02:03,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450723566] [2025-02-05 16:02:03,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:03,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2025-02-05 16:02:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:03,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2025-02-05 16:02:03,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4232, Unknown=0, NotChecked=0, Total=4422 [2025-02-05 16:02:03,788 INFO L87 Difference]: Start difference. First operand 2426 states and 3304 transitions. Second operand has 67 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 47 states have internal predecessors, (151), 25 states have call successors, (27), 22 states have call predecessors, (27), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 16:02:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:13,276 INFO L93 Difference]: Finished difference Result 5775 states and 8156 transitions. [2025-02-05 16:02:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2025-02-05 16:02:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 47 states have internal predecessors, (151), 25 states have call successors, (27), 22 states have call predecessors, (27), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 87 [2025-02-05 16:02:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:13,294 INFO L225 Difference]: With dead ends: 5775 [2025-02-05 16:02:13,294 INFO L226 Difference]: Without dead ends: 3381 [2025-02-05 16:02:13,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10842 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2221, Invalid=39599, Unknown=0, NotChecked=0, Total=41820 [2025-02-05 16:02:13,308 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 589 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 6711 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 6870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:13,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 2258 Invalid, 6870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6711 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-02-05 16:02:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2025-02-05 16:02:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 2331. [2025-02-05 16:02:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1958 states have (on average 1.1940755873340143) internal successors, (2338), 2057 states have internal predecessors, (2338), 234 states have call successors, (234), 175 states have call predecessors, (234), 138 states have return successors, (388), 109 states have call predecessors, (388), 226 states have call successors, (388) [2025-02-05 16:02:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 2960 transitions. [2025-02-05 16:02:13,477 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 2960 transitions. Word has length 87 [2025-02-05 16:02:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:13,477 INFO L471 AbstractCegarLoop]: Abstraction has 2331 states and 2960 transitions. [2025-02-05 16:02:13,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 47 states have internal predecessors, (151), 25 states have call successors, (27), 22 states have call predecessors, (27), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 16:02:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 2960 transitions. [2025-02-05 16:02:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-02-05 16:02:13,481 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:13,481 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:13,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 16:02:13,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:13,682 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:13,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash -80840438, now seen corresponding path program 1 times [2025-02-05 16:02:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552969068] [2025-02-05 16:02:13,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:13,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-02-05 16:02:13,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-02-05 16:02:13,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:13,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 171 proven. 16 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-02-05 16:02:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552969068] [2025-02-05 16:02:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552969068] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703368084] [2025-02-05 16:02:15,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:15,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:15,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:15,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 16:02:15,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-02-05 16:02:15,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-02-05 16:02:15,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:15,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:15,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 289 conjuncts are in the unsatisfiable core [2025-02-05 16:02:15,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:15,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:15,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:15,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:15,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:16,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2025-02-05 16:02:16,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 132 proven. 107 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 16:02:17,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:17,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2025-02-05 16:02:17,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-02-05 16:02:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703368084] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:18,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:02:18,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 50 [2025-02-05 16:02:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716018792] [2025-02-05 16:02:18,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:18,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-02-05 16:02:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:18,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-02-05 16:02:18,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=4168, Unknown=0, NotChecked=0, Total=4422 [2025-02-05 16:02:18,318 INFO L87 Difference]: Start difference. First operand 2331 states and 2960 transitions. Second operand has 50 states, 42 states have (on average 2.880952380952381) internal successors, (121), 39 states have internal predecessors, (121), 17 states have call successors, (20), 13 states have call predecessors, (20), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-05 16:02:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:22,432 INFO L93 Difference]: Finished difference Result 6324 states and 8765 transitions. [2025-02-05 16:02:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2025-02-05 16:02:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 42 states have (on average 2.880952380952381) internal successors, (121), 39 states have internal predecessors, (121), 17 states have call successors, (20), 13 states have call predecessors, (20), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 113 [2025-02-05 16:02:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:22,449 INFO L225 Difference]: With dead ends: 6324 [2025-02-05 16:02:22,449 INFO L226 Difference]: Without dead ends: 4130 [2025-02-05 16:02:22,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1116, Invalid=17790, Unknown=0, NotChecked=0, Total=18906 [2025-02-05 16:02:22,455 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 280 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:22,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1319 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 16:02:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2025-02-05 16:02:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 3623. [2025-02-05 16:02:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 2974 states have (on average 1.1825823806321452) internal successors, (3517), 3130 states have internal predecessors, (3517), 341 states have call successors, (341), 246 states have call predecessors, (341), 307 states have return successors, (866), 255 states have call predecessors, (866), 333 states have call successors, (866) [2025-02-05 16:02:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 4724 transitions. [2025-02-05 16:02:22,790 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 4724 transitions. Word has length 113 [2025-02-05 16:02:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:22,791 INFO L471 AbstractCegarLoop]: Abstraction has 3623 states and 4724 transitions. [2025-02-05 16:02:22,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 42 states have (on average 2.880952380952381) internal successors, (121), 39 states have internal predecessors, (121), 17 states have call successors, (20), 13 states have call predecessors, (20), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-05 16:02:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 4724 transitions. [2025-02-05 16:02:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-02-05 16:02:22,796 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:22,796 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:22,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 16:02:23,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:23,001 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:23,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash 882457391, now seen corresponding path program 1 times [2025-02-05 16:02:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:23,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893944863] [2025-02-05 16:02:23,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:23,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 147 statements into 1 equivalence classes. [2025-02-05 16:02:23,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 147 of 147 statements. [2025-02-05 16:02:23,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:23,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 204 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2025-02-05 16:02:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893944863] [2025-02-05 16:02:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893944863] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168737915] [2025-02-05 16:02:23,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:23,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 16:02:24,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 147 statements into 1 equivalence classes. [2025-02-05 16:02:24,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 147 of 147 statements. [2025-02-05 16:02:24,200 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:24,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:24,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 250 conjuncts are in the unsatisfiable core [2025-02-05 16:02:24,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:24,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:24,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2025-02-05 16:02:24,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:25,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2025-02-05 16:02:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 236 proven. 11 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-02-05 16:02:25,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168737915] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:25,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:25,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 22] total 41 [2025-02-05 16:02:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786688996] [2025-02-05 16:02:25,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:25,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 16:02:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:25,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 16:02:25,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 16:02:25,396 INFO L87 Difference]: Start difference. First operand 3623 states and 4724 transitions. Second operand has 41 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 30 states have internal predecessors, (100), 17 states have call successors, (28), 14 states have call predecessors, (28), 9 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2025-02-05 16:02:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:26,641 INFO L93 Difference]: Finished difference Result 6473 states and 8472 transitions. [2025-02-05 16:02:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 16:02:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 30 states have internal predecessors, (100), 17 states have call successors, (28), 14 states have call predecessors, (28), 9 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 147 [2025-02-05 16:02:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:26,656 INFO L225 Difference]: With dead ends: 6473 [2025-02-05 16:02:26,656 INFO L226 Difference]: Without dead ends: 3639 [2025-02-05 16:02:26,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 16:02:26,664 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:26,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 16:02:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2025-02-05 16:02:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3631. [2025-02-05 16:02:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 2978 states have (on average 1.1816655473472129) internal successors, (3519), 3132 states have internal predecessors, (3519), 341 states have call successors, (341), 246 states have call predecessors, (341), 311 states have return successors, (874), 261 states have call predecessors, (874), 333 states have call successors, (874) [2025-02-05 16:02:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 4734 transitions. [2025-02-05 16:02:27,070 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 4734 transitions. Word has length 147 [2025-02-05 16:02:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:27,070 INFO L471 AbstractCegarLoop]: Abstraction has 3631 states and 4734 transitions. [2025-02-05 16:02:27,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 30 states have internal predecessors, (100), 17 states have call successors, (28), 14 states have call predecessors, (28), 9 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2025-02-05 16:02:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 4734 transitions. [2025-02-05 16:02:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-02-05 16:02:27,076 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:27,076 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:27,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 16:02:27,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:27,276 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:27,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash -814814444, now seen corresponding path program 2 times [2025-02-05 16:02:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:27,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992950532] [2025-02-05 16:02:27,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:27,302 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-02-05 16:02:27,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-02-05 16:02:27,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:02:27,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-02-05 16:02:29,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992950532] [2025-02-05 16:02:29,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992950532] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730511818] [2025-02-05 16:02:29,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:29,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:29,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:29,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 16:02:29,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-02-05 16:02:29,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-02-05 16:02:29,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:02:29,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:29,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-02-05 16:02:29,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:29,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:29,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:29,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:29,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:29,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-02-05 16:02:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 157 proven. 100 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-02-05 16:02:29,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 245 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-02-05 16:02:30,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730511818] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:30,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:30,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 14] total 45 [2025-02-05 16:02:30,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471562722] [2025-02-05 16:02:30,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:30,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-02-05 16:02:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:30,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-02-05 16:02:30,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1876, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 16:02:30,306 INFO L87 Difference]: Start difference. First operand 3631 states and 4734 transitions. Second operand has 45 states, 39 states have (on average 4.205128205128205) internal successors, (164), 29 states have internal predecessors, (164), 22 states have call successors, (31), 19 states have call predecessors, (31), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-05 16:02:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:33,232 INFO L93 Difference]: Finished difference Result 9292 states and 12251 transitions. [2025-02-05 16:02:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-02-05 16:02:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 4.205128205128205) internal successors, (164), 29 states have internal predecessors, (164), 22 states have call successors, (31), 19 states have call predecessors, (31), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 158 [2025-02-05 16:02:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:33,265 INFO L225 Difference]: With dead ends: 9292 [2025-02-05 16:02:33,265 INFO L226 Difference]: Without dead ends: 6212 [2025-02-05 16:02:33,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=511, Invalid=9191, Unknown=0, NotChecked=0, Total=9702 [2025-02-05 16:02:33,275 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 370 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:33,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 2603 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-05 16:02:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2025-02-05 16:02:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 5163. [2025-02-05 16:02:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 4332 states have (on average 1.1819021237303786) internal successors, (5120), 4544 states have internal predecessors, (5120), 485 states have call successors, (485), 336 states have call predecessors, (485), 345 states have return successors, (1323), 291 states have call predecessors, (1323), 477 states have call successors, (1323) [2025-02-05 16:02:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 6928 transitions. [2025-02-05 16:02:33,863 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 6928 transitions. Word has length 158 [2025-02-05 16:02:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:33,863 INFO L471 AbstractCegarLoop]: Abstraction has 5163 states and 6928 transitions. [2025-02-05 16:02:33,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 4.205128205128205) internal successors, (164), 29 states have internal predecessors, (164), 22 states have call successors, (31), 19 states have call predecessors, (31), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-05 16:02:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 6928 transitions. [2025-02-05 16:02:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-02-05 16:02:33,870 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:33,871 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:33,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:34,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 16:02:34,072 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:34,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1872792620, now seen corresponding path program 3 times [2025-02-05 16:02:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164169143] [2025-02-05 16:02:34,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:34,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 170 statements into 6 equivalence classes. [2025-02-05 16:02:34,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 130 of 170 statements. [2025-02-05 16:02:34,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 16:02:34,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 270 proven. 3 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-05 16:02:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164169143] [2025-02-05 16:02:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164169143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182739697] [2025-02-05 16:02:35,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:35,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:35,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:35,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:35,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 16:02:35,793 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 170 statements into 6 equivalence classes. [2025-02-05 16:02:36,149 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 130 of 170 statements. [2025-02-05 16:02:36,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 16:02:36,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:36,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 134 conjuncts are in the unsatisfiable core [2025-02-05 16:02:36,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:36,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:36,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:36,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 250 proven. 23 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-05 16:02:37,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 270 proven. 3 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-05 16:02:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182739697] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:37,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:37,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17] total 47 [2025-02-05 16:02:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420643200] [2025-02-05 16:02:37,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:37,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-05 16:02:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:37,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-05 16:02:37,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 16:02:37,690 INFO L87 Difference]: Start difference. First operand 5163 states and 6928 transitions. Second operand has 47 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 29 states have internal predecessors, (108), 22 states have call successors, (34), 22 states have call predecessors, (34), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2025-02-05 16:02:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:39,587 INFO L93 Difference]: Finished difference Result 10383 states and 14038 transitions. [2025-02-05 16:02:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-05 16:02:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 29 states have internal predecessors, (108), 22 states have call successors, (34), 22 states have call predecessors, (34), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 170 [2025-02-05 16:02:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:39,629 INFO L225 Difference]: With dead ends: 10383 [2025-02-05 16:02:39,629 INFO L226 Difference]: Without dead ends: 6275 [2025-02-05 16:02:39,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2025-02-05 16:02:39,670 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 208 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:39,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1220 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 16:02:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2025-02-05 16:02:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 6021. [2025-02-05 16:02:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6021 states, 5008 states have (on average 1.170726837060703) internal successors, (5863), 5251 states have internal predecessors, (5863), 579 states have call successors, (579), 410 states have call predecessors, (579), 433 states have return successors, (1561), 368 states have call predecessors, (1561), 568 states have call successors, (1561) [2025-02-05 16:02:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6021 states to 6021 states and 8003 transitions. [2025-02-05 16:02:40,456 INFO L78 Accepts]: Start accepts. Automaton has 6021 states and 8003 transitions. Word has length 170 [2025-02-05 16:02:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:40,457 INFO L471 AbstractCegarLoop]: Abstraction has 6021 states and 8003 transitions. [2025-02-05 16:02:40,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 29 states have internal predecessors, (108), 22 states have call successors, (34), 22 states have call predecessors, (34), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2025-02-05 16:02:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6021 states and 8003 transitions. [2025-02-05 16:02:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2025-02-05 16:02:40,472 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:40,472 INFO L218 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 12, 12, 12, 10, 9, 9, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:40,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 16:02:40,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 16:02:40,674 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:40,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash -324954069, now seen corresponding path program 1 times [2025-02-05 16:02:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:40,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825742149] [2025-02-05 16:02:40,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:40,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:40,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 259 statements into 1 equivalence classes. [2025-02-05 16:02:40,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 259 of 259 statements. [2025-02-05 16:02:40,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:40,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 831 proven. 36 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2025-02-05 16:02:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825742149] [2025-02-05 16:02:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825742149] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916652061] [2025-02-05 16:02:44,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:44,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:44,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:44,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 16:02:44,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 259 statements into 1 equivalence classes. [2025-02-05 16:02:44,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 259 of 259 statements. [2025-02-05 16:02:44,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:44,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:44,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 126 conjuncts are in the unsatisfiable core [2025-02-05 16:02:44,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:44,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:45,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:45,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:45,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2025-02-05 16:02:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 565 proven. 68 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2025-02-05 16:02:46,097 INFO L312 TraceCheckSpWp]: Computing backward predicates...