./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 48c9605d 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-?-48c9605-m [2025-02-07 21:07:45,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:07:45,086 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:07:45,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:07:45,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:07:45,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:07:45,102 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:07:45,102 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:07:45,103 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:07:45,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:07:45,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:07:45,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:07:45,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:07:45,104 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:45,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:07:45,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:07:45,105 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 [2025-02-07 21:07:45,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:07:45,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:07:45,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:07:45,304 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:07:45,304 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:07:45,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-02-07 21:07:46,490 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/aef70994a/8d0dd4c849de4260a78a34a63258c663/FLAGdfea8e7e8 [2025-02-07 21:07:46,762 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:07:46,763 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-02-07 21:07:46,770 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/aef70994a/8d0dd4c849de4260a78a34a63258c663/FLAGdfea8e7e8 [2025-02-07 21:07:47,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/aef70994a/8d0dd4c849de4260a78a34a63258c663 [2025-02-07 21:07:47,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:07:47,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:07:47,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:47,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:07:47,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:07:47,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27901385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47, skipping insertion in model container [2025-02-07 21:07:47,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,097 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:07:47,176 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] [2025-02-07 21:07:47,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:47,201 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:07:47,210 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] [2025-02-07 21:07:47,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:47,234 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:07:47,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47 WrapperNode [2025-02-07 21:07:47,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:47,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:47,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:07:47,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:07:47,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,259 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2025-02-07 21:07:47,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:47,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:07:47,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:07:47,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:07:47,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,270 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,290 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 6, 6, 5, 6, 7, 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, 2, 2, 1, 2]. [2025-02-07 21:07:47,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,299 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:07:47,307 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:07:47,307 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:07:47,307 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:07:47,308 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (1/1) ... [2025-02-07 21:07:47,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:47,343 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) [2025-02-07 21:07:47,345 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 [2025-02-07 21:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2025-02-07 21:07:47,374 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2025-02-07 21:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2025-02-07 21:07:47,374 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2025-02-07 21:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2025-02-07 21:07:47,374 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2025-02-07 21:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2025-02-07 21:07:47,375 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2025-02-07 21:07:47,375 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2025-02-07 21:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-07 21:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:07:47,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-02-07 21:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 21:07:47,475 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:07:47,476 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:07:47,665 INFO L1324 $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; [2025-02-07 21:07:47,694 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-02-07 21:07:47,694 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:07:47,703 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:07:47,704 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:07:47,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:47 BoogieIcfgContainer [2025-02-07 21:07:47,704 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:07:47,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:07:47,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:07:47,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:07:47,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:07:47" (1/3) ... [2025-02-07 21:07:47,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcf2392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:47, skipping insertion in model container [2025-02-07 21:07:47,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:47" (2/3) ... [2025-02-07 21:07:47,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcf2392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:47, skipping insertion in model container [2025-02-07 21:07:47,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:47" (3/3) ... [2025-02-07 21:07:47,711 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2025-02-07 21:07:47,721 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:07:47,722 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_deep-nested.c that has 6 procedures, 50 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:07:47,757 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:07:47,767 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;@73e2751f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:07:47,768 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:07:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 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) [2025-02-07 21:07:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 21:07:47,776 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:47,776 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] [2025-02-07 21:07:47,776 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] === [2025-02-07 21:07:47,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash 157145260, now seen corresponding path program 1 times [2025-02-07 21:07:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:47,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562449334] [2025-02-07 21:07:47,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:47,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 21:07:47,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 21:07:47,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:47,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562449334] [2025-02-07 21:07:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562449334] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:07:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-02-07 21:07:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988890456] [2025-02-07 21:07:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:48,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 21:07:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:48,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 21:07:48,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-07 21:07:49,000 INFO L87 Difference]: Start difference. First operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 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 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 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) [2025-02-07 21:07:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:49,390 INFO L93 Difference]: Finished difference Result 114 states and 160 transitions. [2025-02-07 21:07:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:07:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 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 25 [2025-02-07 21:07:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:49,397 INFO L225 Difference]: With dead ends: 114 [2025-02-07 21:07:49,397 INFO L226 Difference]: Without dead ends: 60 [2025-02-07 21:07:49,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2025-02-07 21:07:49,403 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 58 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:49,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 454 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 21:07:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-07 21:07:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2025-02-07 21:07:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.35) internal successors, (54), 45 states have internal predecessors, (54), 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) [2025-02-07 21:07:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2025-02-07 21:07:49,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 25 [2025-02-07 21:07:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:49,427 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2025-02-07 21:07:49,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 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) [2025-02-07 21:07:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2025-02-07 21:07:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 21:07:49,428 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:49,428 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] [2025-02-07 21:07:49,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:07:49,429 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] === [2025-02-07 21:07:49,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1634887556, now seen corresponding path program 1 times [2025-02-07 21:07:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:49,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523707773] [2025-02-07 21:07:49,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:49,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 21:07:49,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 21:07:49,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:49,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523707773] [2025-02-07 21:07:50,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523707773] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670258714] [2025-02-07 21:07:50,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:50,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:50,342 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) [2025-02-07 21:07:50,344 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 [2025-02-07 21:07:50,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 21:07:50,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 21:07:50,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:50,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:50,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 134 conjuncts are in the unsatisfiable core [2025-02-07 21:07:50,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:50,559 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 [2025-02-07 21:07:50,692 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 [2025-02-07 21:07:50,845 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 [2025-02-07 21:07:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:51,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:51,692 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 [2025-02-07 21:07:51,779 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 [2025-02-07 21:07:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670258714] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:52,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 19] total 51 [2025-02-07 21:07:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754397241] [2025-02-07 21:07:52,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:52,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-02-07 21:07:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:52,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-02-07 21:07:52,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2025-02-07 21:07:52,380 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 51 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 37 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:07:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:58,454 INFO L93 Difference]: Finished difference Result 374 states and 537 transitions. [2025-02-07 21:07:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-02-07 21:07:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 37 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-02-07 21:07:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:58,457 INFO L225 Difference]: With dead ends: 374 [2025-02-07 21:07:58,457 INFO L226 Difference]: Without dead ends: 320 [2025-02-07 21:07:58,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6673 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2137, Invalid=22355, Unknown=0, NotChecked=0, Total=24492 [2025-02-07 21:07:58,465 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 678 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:58,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 873 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-07 21:07:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2025-02-07 21:07:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 225. [2025-02-07 21:07:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 177 states have (on average 1.3502824858757063) internal successors, (239), 194 states have internal predecessors, (239), 25 states have call successors, (25), 23 states have call predecessors, (25), 22 states have return successors, (36), 19 states have call predecessors, (36), 23 states have call successors, (36) [2025-02-07 21:07:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 300 transitions. [2025-02-07 21:07:58,500 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 300 transitions. Word has length 37 [2025-02-07 21:07:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:58,500 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 300 transitions. [2025-02-07 21:07:58,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 37 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:07:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 300 transitions. [2025-02-07 21:07:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-07 21:07:58,503 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:58,503 INFO L218 NwaCegarLoop]: trace histogram [4, 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] [2025-02-07 21:07:58,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 21:07:58,703 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 [2025-02-07 21:07:58,704 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] === [2025-02-07 21:07:58,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2147162445, now seen corresponding path program 1 times [2025-02-07 21:07:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:58,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431727665] [2025-02-07 21:07:58,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:58,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 21:07:58,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 21:07:58,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:58,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 21:07:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431727665] [2025-02-07 21:07:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431727665] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446807632] [2025-02-07 21:07:59,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:59,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:59,395 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) [2025-02-07 21:07:59,399 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 [2025-02-07 21:07:59,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 21:07:59,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 21:07:59,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:59,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:59,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 198 conjuncts are in the unsatisfiable core [2025-02-07 21:07:59,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:59,622 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 [2025-02-07 21:07:59,674 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 [2025-02-07 21:07:59,896 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 [2025-02-07 21:08:00,051 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 [2025-02-07 21:08:00,111 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 [2025-02-07 21:08:00,359 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 [2025-02-07 21:08:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:08:00,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:08:01,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446807632] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:08:01,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:08:01,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 20] total 53 [2025-02-07 21:08:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773728152] [2025-02-07 21:08:01,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:01,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-07 21:08:01,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:01,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-07 21:08:01,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2025-02-07 21:08:01,753 INFO L87 Difference]: Start difference. First operand 225 states and 300 transitions. Second operand has 53 states, 46 states have (on average 2.347826086956522) internal successors, (108), 36 states have internal predecessors, (108), 23 states have call successors, (34), 22 states have call predecessors, (34), 5 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-07 21:08:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:15,527 INFO L93 Difference]: Finished difference Result 1070 states and 1521 transitions. [2025-02-07 21:08:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2025-02-07 21:08:15,528 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 2.347826086956522) internal successors, (108), 36 states have internal predecessors, (108), 23 states have call successors, (34), 22 states have call predecessors, (34), 5 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2025-02-07 21:08:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:15,537 INFO L225 Difference]: With dead ends: 1070 [2025-02-07 21:08:15,537 INFO L226 Difference]: Without dead ends: 825 [2025-02-07 21:08:15,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14678 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2475, Invalid=46145, Unknown=0, NotChecked=0, Total=48620 [2025-02-07 21:08:15,549 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 536 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 5695 mSolverCounterSat, 259 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 5961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 5695 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:15,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 665 Invalid, 5961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 5695 Invalid, 7 Unknown, 0 Unchecked, 4.1s Time] [2025-02-07 21:08:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2025-02-07 21:08:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 676. [2025-02-07 21:08:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 527 states have (on average 1.252371916508539) internal successors, (660), 574 states have internal predecessors, (660), 75 states have call successors, (75), 64 states have call predecessors, (75), 73 states have return successors, (133), 59 states have call predecessors, (133), 73 states have call successors, (133) [2025-02-07 21:08:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 868 transitions. [2025-02-07 21:08:15,622 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 868 transitions. Word has length 64 [2025-02-07 21:08:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:15,623 INFO L471 AbstractCegarLoop]: Abstraction has 676 states and 868 transitions. [2025-02-07 21:08:15,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 2.347826086956522) internal successors, (108), 36 states have internal predecessors, (108), 23 states have call successors, (34), 22 states have call predecessors, (34), 5 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-07 21:08:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 868 transitions. [2025-02-07 21:08:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-02-07 21:08:15,635 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:15,635 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2025-02-07 21:08:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:15,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:15,836 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] === [2025-02-07 21:08:15,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 287132066, now seen corresponding path program 1 times [2025-02-07 21:08:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875650153] [2025-02-07 21:08:15,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:15,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-02-07 21:08:15,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 21:08:15,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:15,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-02-07 21:08:16,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:16,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875650153] [2025-02-07 21:08:16,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875650153] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:08:16,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:08:16,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-07 21:08:16,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983436141] [2025-02-07 21:08:16,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:08:16,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 21:08:16,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:16,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 21:08:16,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-07 21:08:16,550 INFO L87 Difference]: Start difference. First operand 676 states and 868 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 21:08:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:16,860 INFO L93 Difference]: Finished difference Result 1358 states and 1744 transitions. [2025-02-07 21:08:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:08:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 98 [2025-02-07 21:08:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:16,865 INFO L225 Difference]: With dead ends: 1358 [2025-02-07 21:08:16,867 INFO L226 Difference]: Without dead ends: 680 [2025-02-07 21:08:16,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:08:16,869 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:16,869 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:08:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2025-02-07 21:08:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2025-02-07 21:08:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 528 states have (on average 1.2481060606060606) internal successors, (659), 573 states have internal predecessors, (659), 75 states have call successors, (75), 64 states have call predecessors, (75), 74 states have return successors, (134), 59 states have call predecessors, (134), 73 states have call successors, (134) [2025-02-07 21:08:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 868 transitions. [2025-02-07 21:08:16,949 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 868 transitions. Word has length 98 [2025-02-07 21:08:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:16,950 INFO L471 AbstractCegarLoop]: Abstraction has 678 states and 868 transitions. [2025-02-07 21:08:16,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 21:08:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 868 transitions. [2025-02-07 21:08:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-07 21:08:16,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:16,953 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:16,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-07 21:08:16,954 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] === [2025-02-07 21:08:16,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 656546746, now seen corresponding path program 1 times [2025-02-07 21:08:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:16,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327854318] [2025-02-07 21:08:16,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:16,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 109 statements into 1 equivalence classes. [2025-02-07 21:08:17,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 109 of 109 statements. [2025-02-07 21:08:17,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:17,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-02-07 21:08:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327854318] [2025-02-07 21:08:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327854318] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614234717] [2025-02-07 21:08:18,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:18,252 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) [2025-02-07 21:08:18,255 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 [2025-02-07 21:08:18,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 109 statements into 1 equivalence classes. [2025-02-07 21:08:18,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 109 of 109 statements. [2025-02-07 21:08:18,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:18,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:18,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 249 conjuncts are in the unsatisfiable core [2025-02-07 21:08:18,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:18,539 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 [2025-02-07 21:08:18,551 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 [2025-02-07 21:08:18,704 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 [2025-02-07 21:08:18,839 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 [2025-02-07 21:08:18,979 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 [2025-02-07 21:08:19,033 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 [2025-02-07 21:08:19,116 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 [2025-02-07 21:08:19,348 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 [2025-02-07 21:08:19,480 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 [2025-02-07 21:08:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 21:08:19,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-02-07 21:08:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614234717] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:08:20,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:08:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32, 16] total 57 [2025-02-07 21:08:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008984573] [2025-02-07 21:08:20,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:20,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-07 21:08:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:20,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-07 21:08:20,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2025-02-07 21:08:20,745 INFO L87 Difference]: Start difference. First operand 678 states and 868 transitions. Second operand has 57 states, 49 states have (on average 3.122448979591837) internal successors, (153), 41 states have internal predecessors, (153), 24 states have call successors, (39), 21 states have call predecessors, (39), 6 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2025-02-07 21:08:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:38,763 INFO L93 Difference]: Finished difference Result 2225 states and 2882 transitions. [2025-02-07 21:08:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2025-02-07 21:08:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 49 states have (on average 3.122448979591837) internal successors, (153), 41 states have internal predecessors, (153), 24 states have call successors, (39), 21 states have call predecessors, (39), 6 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) Word has length 109 [2025-02-07 21:08:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:38,773 INFO L225 Difference]: With dead ends: 2225 [2025-02-07 21:08:38,774 INFO L226 Difference]: Without dead ends: 1527 [2025-02-07 21:08:38,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22957 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2911, Invalid=62881, Unknown=0, NotChecked=0, Total=65792 [2025-02-07 21:08:38,778 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 898 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 10534 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 10842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 10534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:38,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 977 Invalid, 10842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 10534 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2025-02-07 21:08:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2025-02-07 21:08:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1222. [2025-02-07 21:08:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 976 states have (on average 1.2407786885245902) internal successors, (1211), 1053 states have internal predecessors, (1211), 122 states have call successors, (122), 103 states have call predecessors, (122), 123 states have return successors, (246), 94 states have call predecessors, (246), 120 states have call successors, (246) [2025-02-07 21:08:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1579 transitions. [2025-02-07 21:08:38,910 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1579 transitions. Word has length 109 [2025-02-07 21:08:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:38,910 INFO L471 AbstractCegarLoop]: Abstraction has 1222 states and 1579 transitions. [2025-02-07 21:08:38,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 49 states have (on average 3.122448979591837) internal successors, (153), 41 states have internal predecessors, (153), 24 states have call successors, (39), 21 states have call predecessors, (39), 6 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2025-02-07 21:08:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1579 transitions. [2025-02-07 21:08:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2025-02-07 21:08:38,913 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:38,913 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 9, 8, 8, 8, 8, 8, 6, 4, 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] [2025-02-07 21:08:38,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 21:08:39,118 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 [2025-02-07 21:08:39,118 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] === [2025-02-07 21:08:39,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1066002820, now seen corresponding path program 1 times [2025-02-07 21:08:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669385021] [2025-02-07 21:08:39,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:39,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 135 statements into 1 equivalence classes. [2025-02-07 21:08:39,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 135 of 135 statements. [2025-02-07 21:08:39,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:39,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 154 proven. 56 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-02-07 21:08:40,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:40,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669385021] [2025-02-07 21:08:40,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669385021] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:40,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600373219] [2025-02-07 21:08:40,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:40,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:40,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:40,673 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) [2025-02-07 21:08:40,674 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 [2025-02-07 21:08:40,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 135 statements into 1 equivalence classes. [2025-02-07 21:08:40,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 135 of 135 statements. [2025-02-07 21:08:40,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:40,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:40,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 154 conjuncts are in the unsatisfiable core [2025-02-07 21:08:40,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:40,979 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 [2025-02-07 21:08:40,996 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 [2025-02-07 21:08:41,064 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 [2025-02-07 21:08:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 166 proven. 8 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-02-07 21:08:41,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600373219] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:42,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:42,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 33 [2025-02-07 21:08:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847011070] [2025-02-07 21:08:42,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:42,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 21:08:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:42,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 21:08:42,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 21:08:42,505 INFO L87 Difference]: Start difference. First operand 1222 states and 1579 transitions. Second operand has 33 states, 26 states have (on average 2.423076923076923) internal successors, (63), 27 states have internal predecessors, (63), 14 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-07 21:08:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:43,754 INFO L93 Difference]: Finished difference Result 2466 states and 3219 transitions. [2025-02-07 21:08:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 21:08:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.423076923076923) internal successors, (63), 27 states have internal predecessors, (63), 14 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) Word has length 135 [2025-02-07 21:08:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:43,760 INFO L225 Difference]: With dead ends: 2466 [2025-02-07 21:08:43,761 INFO L226 Difference]: Without dead ends: 1240 [2025-02-07 21:08:43,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=3606, Unknown=0, NotChecked=0, Total=3906 [2025-02-07 21:08:43,764 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:43,764 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 213 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 21:08:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2025-02-07 21:08:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1234. [2025-02-07 21:08:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 982 states have (on average 1.2382892057026476) internal successors, (1216), 1058 states have internal predecessors, (1216), 122 states have call successors, (122), 103 states have call predecessors, (122), 129 states have return successors, (254), 100 states have call predecessors, (254), 120 states have call successors, (254) [2025-02-07 21:08:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1592 transitions. [2025-02-07 21:08:43,864 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1592 transitions. Word has length 135 [2025-02-07 21:08:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:43,865 INFO L471 AbstractCegarLoop]: Abstraction has 1234 states and 1592 transitions. [2025-02-07 21:08:43,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.423076923076923) internal successors, (63), 27 states have internal predecessors, (63), 14 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-07 21:08:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1592 transitions. [2025-02-07 21:08:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2025-02-07 21:08:43,868 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:43,869 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 11, 11, 10, 10, 10, 10, 10, 8, 6, 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] [2025-02-07 21:08:43,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 21:08:44,073 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 [2025-02-07 21:08:44,073 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] === [2025-02-07 21:08:44,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:44,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1829615042, now seen corresponding path program 2 times [2025-02-07 21:08:44,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:44,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849862216] [2025-02-07 21:08:44,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:44,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:44,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 157 statements into 2 equivalence classes. [2025-02-07 21:08:44,165 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 157 of 157 statements. [2025-02-07 21:08:44,165 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:44,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2025-02-07 21:08:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849862216] [2025-02-07 21:08:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849862216] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239620571] [2025-02-07 21:08:45,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:45,719 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) [2025-02-07 21:08:45,721 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 [2025-02-07 21:08:45,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 157 statements into 2 equivalence classes. [2025-02-07 21:08:46,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 157 of 157 statements. [2025-02-07 21:08:46,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:46,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:46,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 303 conjuncts are in the unsatisfiable core [2025-02-07 21:08:46,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:46,064 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 [2025-02-07 21:08:46,127 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 [2025-02-07 21:08:47,097 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 [2025-02-07 21:08:47,272 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 [2025-02-07 21:08:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 203 proven. 9 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2025-02-07 21:08:47,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:47,807 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 [2025-02-07 21:08:47,916 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 [2025-02-07 21:08:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 198 proven. 14 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2025-02-07 21:08:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239620571] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:08:48,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:08:48,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 22] total 60 [2025-02-07 21:08:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702395288] [2025-02-07 21:08:48,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:48,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-02-07 21:08:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:48,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-02-07 21:08:48,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 21:08:48,902 INFO L87 Difference]: Start difference. First operand 1234 states and 1592 transitions. Second operand has 60 states, 53 states have (on average 2.169811320754717) internal successors, (115), 43 states have internal predecessors, (115), 22 states have call successors, (34), 19 states have call predecessors, (34), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2025-02-07 21:08:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:58,991 INFO L93 Difference]: Finished difference Result 4730 states and 6168 transitions. [2025-02-07 21:08:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2025-02-07 21:08:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 53 states have (on average 2.169811320754717) internal successors, (115), 43 states have internal predecessors, (115), 22 states have call successors, (34), 19 states have call predecessors, (34), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 157 [2025-02-07 21:08:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:59,005 INFO L225 Difference]: With dead ends: 4730 [2025-02-07 21:08:59,005 INFO L226 Difference]: Without dead ends: 3496 [2025-02-07 21:08:59,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 285 SyntacticMatches, 11 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12824 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3923, Invalid=29749, Unknown=0, NotChecked=0, Total=33672 [2025-02-07 21:08:59,012 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 746 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:59,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 680 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-07 21:08:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2025-02-07 21:08:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2737. [2025-02-07 21:08:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2258 states have (on average 1.2307351638618247) internal successors, (2779), 2422 states have internal predecessors, (2779), 231 states have call successors, (231), 185 states have call predecessors, (231), 247 states have return successors, (522), 166 states have call predecessors, (522), 229 states have call successors, (522) [2025-02-07 21:08:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3532 transitions. [2025-02-07 21:08:59,269 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3532 transitions. Word has length 157 [2025-02-07 21:08:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:59,270 INFO L471 AbstractCegarLoop]: Abstraction has 2737 states and 3532 transitions. [2025-02-07 21:08:59,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 53 states have (on average 2.169811320754717) internal successors, (115), 43 states have internal predecessors, (115), 22 states have call successors, (34), 19 states have call predecessors, (34), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2025-02-07 21:08:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3532 transitions. [2025-02-07 21:08:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2025-02-07 21:08:59,276 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:59,276 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 12, 10, 10, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:59,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:59,481 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 [2025-02-07 21:08:59,481 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] === [2025-02-07 21:08:59,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash 719484038, now seen corresponding path program 1 times [2025-02-07 21:08:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:59,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570243421] [2025-02-07 21:08:59,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:08:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:59,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 210 statements into 1 equivalence classes. [2025-02-07 21:08:59,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 210 of 210 statements. [2025-02-07 21:08:59,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:59,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:09:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 153 proven. 84 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2025-02-07 21:09:00,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:09:00,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570243421] [2025-02-07 21:09:00,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570243421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:09:00,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356125825] [2025-02-07 21:09:00,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:09:00,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:09:00,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:09:00,771 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) [2025-02-07 21:09:00,772 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 [2025-02-07 21:09:00,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 210 statements into 1 equivalence classes. [2025-02-07 21:09:01,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 210 of 210 statements. [2025-02-07 21:09:01,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:09:01,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:09:01,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 127 conjuncts are in the unsatisfiable core [2025-02-07 21:09:01,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:09:01,232 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 [2025-02-07 21:09:01,378 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 [2025-02-07 21:09:01,415 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 [2025-02-07 21:09:01,634 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 [2025-02-07 21:09:01,842 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 [2025-02-07 21:09:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 92 proven. 465 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2025-02-07 21:09:02,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:09:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 162 proven. 14 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-02-07 21:09:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356125825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:09:03,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:09:03,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 20] total 52 [2025-02-07 21:09:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078028477] [2025-02-07 21:09:03,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:09:03,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-07 21:09:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:09:03,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-07 21:09:03,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2514, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 21:09:03,019 INFO L87 Difference]: Start difference. First operand 2737 states and 3532 transitions. Second operand has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 35 states have internal predecessors, (122), 28 states have call successors, (47), 22 states have call predecessors, (47), 7 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2025-02-07 21:09:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:09:17,057 INFO L93 Difference]: Finished difference Result 7001 states and 9930 transitions. [2025-02-07 21:09:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2025-02-07 21:09:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 35 states have internal predecessors, (122), 28 states have call successors, (47), 22 states have call predecessors, (47), 7 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) Word has length 210 [2025-02-07 21:09:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:09:17,076 INFO L225 Difference]: With dead ends: 7001 [2025-02-07 21:09:17,076 INFO L226 Difference]: Without dead ends: 4194 [2025-02-07 21:09:17,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 398 SyntacticMatches, 3 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28459 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3097, Invalid=79559, Unknown=0, NotChecked=0, Total=82656 [2025-02-07 21:09:17,086 INFO L435 NwaCegarLoop]: 132 mSDtfsCounter, 963 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 5992 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 6449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 5992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:09:17,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 3412 Invalid, 6449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 5992 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2025-02-07 21:09:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2025-02-07 21:09:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3440. [2025-02-07 21:09:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 2653 states have (on average 1.1956275914059555) internal successors, (3172), 2815 states have internal predecessors, (3172), 353 states have call successors, (353), 289 states have call predecessors, (353), 433 states have return successors, (949), 341 states have call predecessors, (949), 334 states have call successors, (949) [2025-02-07 21:09:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4474 transitions. [2025-02-07 21:09:17,370 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4474 transitions. Word has length 210 [2025-02-07 21:09:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:09:17,371 INFO L471 AbstractCegarLoop]: Abstraction has 3440 states and 4474 transitions. [2025-02-07 21:09:17,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 35 states have internal predecessors, (122), 28 states have call successors, (47), 22 states have call predecessors, (47), 7 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2025-02-07 21:09:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4474 transitions. [2025-02-07 21:09:17,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-02-07 21:09:17,378 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:09:17,378 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 12, 12, 12, 11, 11, 11, 11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:09:17,389 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 [2025-02-07 21:09:17,582 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 [2025-02-07 21:09:17,582 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] === [2025-02-07 21:09:17,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:09:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash -128048246, now seen corresponding path program 2 times [2025-02-07 21:09:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:09:17,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441681007] [2025-02-07 21:09:17,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:09:17,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:09:17,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 217 statements into 2 equivalence classes. [2025-02-07 21:09:17,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 217 of 217 statements. [2025-02-07 21:09:17,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:09:17,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat