./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i -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 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:09:16,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:09:16,156 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:09:16,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:09:16,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:09:16,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:09:16,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:09:16,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:09:16,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:09:16,209 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:09:16,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:09:16,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:09:16,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:09:16,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:09:16,209 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:09:16,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:09:16,215 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:09:16,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:09:16,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:09:16,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:09:16,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:09:16,216 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 -> 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 [2025-01-09 04:09:16,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:09:16,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:09:16,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:09:16,454 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:09:16,455 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:09:16,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2025-01-09 04:09:17,724 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0bf7816d8/79c784808c0d42d596d78021cd45def5/FLAGcf37ee98e [2025-01-09 04:09:18,013 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:09:18,014 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2025-01-09 04:09:18,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0bf7816d8/79c784808c0d42d596d78021cd45def5/FLAGcf37ee98e [2025-01-09 04:09:18,304 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0bf7816d8/79c784808c0d42d596d78021cd45def5 [2025-01-09 04:09:18,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:09:18,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:09:18,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:09:18,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:09:18,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:09:18,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74781be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18, skipping insertion in model container [2025-01-09 04:09:18,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:09:18,404 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-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2025-01-09 04:09:18,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:09:18,418 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:09:18,425 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-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2025-01-09 04:09:18,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:09:18,437 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:09:18,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18 WrapperNode [2025-01-09 04:09:18,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:09:18,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:09:18,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:09:18,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:09:18,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,456 INFO L138 Inliner]: procedures = 18, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2025-01-09 04:09:18,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:09:18,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:09:18,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:09:18,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:09:18,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,470 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 12, 4, 3]. 57 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 1, 1, 0]. The 5 writes are split as follows [0, 3, 1, 1]. [2025-01-09 04:09:18,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,474 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:09:18,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:09:18,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:09:18,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:09:18,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (1/1) ... [2025-01-09 04:09:18,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:09:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:09:18,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 04:09:18,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 04:09:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2025-01-09 04:09:18,527 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2025-01-09 04:09:18,527 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:09:18,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 04:09:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 04:09:18,578 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:09:18,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:09:18,708 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-01-09 04:09:18,708 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:09:18,720 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:09:18,721 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 04:09:18,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:09:18 BoogieIcfgContainer [2025-01-09 04:09:18,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:09:18,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:09:18,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:09:18,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:09:18,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:09:18" (1/3) ... [2025-01-09 04:09:18,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341a18c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:09:18, skipping insertion in model container [2025-01-09 04:09:18,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:09:18" (2/3) ... [2025-01-09 04:09:18,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341a18c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:09:18, skipping insertion in model container [2025-01-09 04:09:18,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:09:18" (3/3) ... [2025-01-09 04:09:18,728 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_3.i [2025-01-09 04:09:18,741 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:09:18,743 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_simple_array_index_value_3.i that has 3 procedures, 25 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:09:18,786 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:09:18,801 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;@4c9b26c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:09:18,802 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:09:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:09:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-09 04:09:18,809 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:09:18,809 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:09:18,810 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:09:18,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:09:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1413062803, now seen corresponding path program 1 times [2025-01-09 04:09:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:09:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449035252] [2025-01-09 04:09:18,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:09:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:09:18,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 04:09:18,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 04:09:18,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:09:18,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:09:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:09:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449035252] [2025-01-09 04:09:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449035252] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:09:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:09:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 04:09:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475720579] [2025-01-09 04:09:19,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:09:19,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 04:09:19,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:09:19,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 04:09:19,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-09 04:09:19,339 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:09:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:09:19,464 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2025-01-09 04:09:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 04:09:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-01-09 04:09:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:09:19,470 INFO L225 Difference]: With dead ends: 47 [2025-01-09 04:09:19,470 INFO L226 Difference]: Without dead ends: 21 [2025-01-09 04:09:19,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-01-09 04:09:19,474 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:09:19,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:09:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-01-09 04:09:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-01-09 04:09:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 04:09:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-01-09 04:09:19,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2025-01-09 04:09:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:09:19,495 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-01-09 04:09:19,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:09:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-01-09 04:09:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 04:09:19,496 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:09:19,497 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:09:19,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:09:19,497 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:09:19,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:09:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1244657017, now seen corresponding path program 1 times [2025-01-09 04:09:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:09:19,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568952979] [2025-01-09 04:09:19,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:09:19,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:09:19,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 04:09:19,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 04:09:19,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:09:19,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:09:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:09:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568952979] [2025-01-09 04:09:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568952979] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572103593] [2025-01-09 04:09:19,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:09:19,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:09:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:09:19,945 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) [2025-01-09 04:09:19,946 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 [2025-01-09 04:09:19,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 04:09:20,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 04:09:20,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:09:20,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:20,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 04:09:20,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:09:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:09:20,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:09:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:09:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572103593] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:09:20,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:09:20,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2025-01-09 04:09:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308875251] [2025-01-09 04:09:20,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:09:20,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 04:09:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:09:20,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 04:09:20,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2025-01-09 04:09:20,569 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 04:09:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:09:20,749 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2025-01-09 04:09:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:09:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 20 [2025-01-09 04:09:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:09:20,750 INFO L225 Difference]: With dead ends: 36 [2025-01-09 04:09:20,750 INFO L226 Difference]: Without dead ends: 25 [2025-01-09 04:09:20,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:09:20,752 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:09:20,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 111 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:09:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-01-09 04:09:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-01-09 04:09:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 04:09:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2025-01-09 04:09:20,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2025-01-09 04:09:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:09:20,756 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2025-01-09 04:09:20,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 04:09:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2025-01-09 04:09:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 04:09:20,757 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:09:20,757 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:09:20,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 04:09:20,957 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 [2025-01-09 04:09:20,958 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:09:20,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:09:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash -427815883, now seen corresponding path program 2 times [2025-01-09 04:09:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:09:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733298876] [2025-01-09 04:09:20,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:09:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:09:20,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-09 04:09:21,000 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 04:09:21,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:09:21,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 04:09:21,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:09:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733298876] [2025-01-09 04:09:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733298876] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844682623] [2025-01-09 04:09:21,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:09:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:09:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:09:21,760 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) [2025-01-09 04:09:21,761 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 [2025-01-09 04:09:21,816 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-09 04:09:21,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 04:09:21,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:09:21,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:21,926 WARN L254 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 152 conjuncts are in the unsatisfiable core [2025-01-09 04:09:21,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:09:22,086 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 25 treesize of output 21 [2025-01-09 04:09:22,659 INFO L349 Elim1Store]: treesize reduction 213, result has 7.4 percent of original size [2025-01-09 04:09:22,659 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 2 case distinctions, treesize of input 92 treesize of output 25 [2025-01-09 04:09:22,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-01-09 04:09:22,743 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 [2025-01-09 04:09:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:09:22,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:09:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,094 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:09:25,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 168 [2025-01-09 04:09:25,179 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,180 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,187 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,189 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:25,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:09:25,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 65 [2025-01-09 04:09:25,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 8 [2025-01-09 04:09:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844682623] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:26,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:09:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2025-01-09 04:09:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269716099] [2025-01-09 04:09:26,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:09:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-09 04:09:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:09:26,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-09 04:09:26,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2025-01-09 04:09:26,080 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 31 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 26 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2025-01-09 04:09:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:09:27,245 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2025-01-09 04:09:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 04:09:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 26 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 30 [2025-01-09 04:09:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:09:27,246 INFO L225 Difference]: With dead ends: 51 [2025-01-09 04:09:27,246 INFO L226 Difference]: Without dead ends: 36 [2025-01-09 04:09:27,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2025-01-09 04:09:27,248 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:09:27,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 142 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 04:09:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-09 04:09:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-01-09 04:09:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-09 04:09:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2025-01-09 04:09:27,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2025-01-09 04:09:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:09:27,254 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2025-01-09 04:09:27,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 26 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2025-01-09 04:09:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2025-01-09 04:09:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-09 04:09:27,255 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:09:27,255 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:09:27,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 04:09:27,455 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 [2025-01-09 04:09:27,456 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:09:27,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:09:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1371036561, now seen corresponding path program 3 times [2025-01-09 04:09:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:09:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405973091] [2025-01-09 04:09:27,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:09:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:09:27,466 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 5 equivalence classes. [2025-01-09 04:09:27,512 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 04:09:27,512 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 04:09:27,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:09:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:09:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405973091] [2025-01-09 04:09:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405973091] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408394680] [2025-01-09 04:09:28,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:09:28,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:09:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:09:28,307 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) [2025-01-09 04:09:28,311 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 [2025-01-09 04:09:28,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 5 equivalence classes. [2025-01-09 04:09:28,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 04:09:28,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 04:09:28,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:28,539 WARN L254 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 183 conjuncts are in the unsatisfiable core [2025-01-09 04:09:28,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:09:28,638 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 79 treesize of output 66 [2025-01-09 04:09:28,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 21 [2025-01-09 04:09:28,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 22 [2025-01-09 04:09:29,523 INFO L349 Elim1Store]: treesize reduction 475, result has 8.3 percent of original size [2025-01-09 04:09:29,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 156 treesize of output 96 [2025-01-09 04:09:29,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-01-09 04:09:29,880 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 [2025-01-09 04:09:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 04:09:30,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:09:34,251 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,252 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,253 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,259 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,262 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,266 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,268 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:09:34,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 16 case distinctions, treesize of input 383 treesize of output 498 [2025-01-09 04:09:34,507 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,514 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,514 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:09:34,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 529 treesize of output 448 [2025-01-09 04:09:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,541 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 462 treesize of output 378 [2025-01-09 04:09:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,555 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,555 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 249 [2025-01-09 04:09:34,734 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 04:09:34,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 140 [2025-01-09 04:09:34,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:09:34,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 19 [2025-01-09 04:09:36,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408394680] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:36,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:09:36,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2025-01-09 04:09:36,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279957832] [2025-01-09 04:09:36,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:09:36,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-09 04:09:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:09:36,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-09 04:09:36,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1998, Unknown=0, NotChecked=0, Total=2162 [2025-01-09 04:09:36,855 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 38 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2025-01-09 04:09:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:09:40,155 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2025-01-09 04:09:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 04:09:40,155 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 35 [2025-01-09 04:09:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:09:40,158 INFO L225 Difference]: With dead ends: 58 [2025-01-09 04:09:40,158 INFO L226 Difference]: Without dead ends: 43 [2025-01-09 04:09:40,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=406, Invalid=4016, Unknown=0, NotChecked=0, Total=4422 [2025-01-09 04:09:40,160 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:09:40,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 162 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 04:09:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-01-09 04:09:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2025-01-09 04:09:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2025-01-09 04:09:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2025-01-09 04:09:40,176 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2025-01-09 04:09:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:09:40,176 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2025-01-09 04:09:40,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2025-01-09 04:09:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2025-01-09 04:09:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-09 04:09:40,179 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:09:40,179 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:09:40,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 04:09:40,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:09:40,379 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:09:40,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:09:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1807343901, now seen corresponding path program 4 times [2025-01-09 04:09:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:09:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955043216] [2025-01-09 04:09:40,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:09:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:09:40,391 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-01-09 04:09:40,399 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 04:09:40,399 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 04:09:40,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-09 04:09:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:09:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955043216] [2025-01-09 04:09:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955043216] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:09:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006745591] [2025-01-09 04:09:41,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:09:41,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:09:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:09:41,046 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) [2025-01-09 04:09:41,047 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 [2025-01-09 04:09:41,116 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-01-09 04:09:41,173 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 04:09:41,173 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 04:09:41,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:09:41,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-01-09 04:09:41,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:09:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-09 04:09:41,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:10:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:10:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006745591] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:10:23,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:10:23,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 47 [2025-01-09 04:10:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087553160] [2025-01-09 04:10:23,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:10:23,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-01-09 04:10:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:23,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-01-09 04:10:23,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1957, Unknown=10, NotChecked=0, Total=2162 [2025-01-09 04:10:23,314 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 47 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 40 states have internal predecessors, (50), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) [2025-01-09 04:10:27,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:31,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:35,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:39,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:43,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:47,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:51,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 04:10:55,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []