./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 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-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-?-48c9605-m [2025-02-07 21:07:12,546 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:07:12,639 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:07:12,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:07:12,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:07:12,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:07:12,684 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:07:12,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:07:12,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:07:12,684 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:07:12,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:07:12,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:07:12,685 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:07:12,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:07:12,686 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:07:12,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:07:12,689 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:07:12,689 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:07:12,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:07:12,690 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:12,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:07:12,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:07:12,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:07:12,691 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 [2025-02-07 21:07:12,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:07:12,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:07:12,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:07:12,953 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:07:12,954 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:07:12,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2025-02-07 21:07:14,041 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb5494138/0d7de3f2b8374994bd94692e3841e46e/FLAGdf8d734cf [2025-02-07 21:07:14,227 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:07:14,228 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2025-02-07 21:07:14,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb5494138/0d7de3f2b8374994bd94692e3841e46e/FLAGdf8d734cf [2025-02-07 21:07:14,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb5494138/0d7de3f2b8374994bd94692e3841e46e [2025-02-07 21:07:14,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:07:14,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:07:14,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:14,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:07:14,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:07:14,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f214cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14, skipping insertion in model container [2025-02-07 21:07:14,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,620 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:07:14,707 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] [2025-02-07 21:07:14,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:14,730 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:07:14,739 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] [2025-02-07 21:07:14,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:14,762 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:07:14,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14 WrapperNode [2025-02-07 21:07:14,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:14,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:14,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:07:14,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:07:14,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,789 INFO L138 Inliner]: procedures = 18, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2025-02-07 21:07:14,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:14,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:07:14,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:07:14,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:07:14,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,809 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]. [2025-02-07 21:07:14,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,815 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:07:14,825 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:07:14,825 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:07:14,825 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:07:14,825 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (1/1) ... [2025-02-07 21:07:14,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:14,854 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 21:07:14,859 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 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 21:07:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 21:07:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 21:07:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 21:07:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2025-02-07 21:07:14,882 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2025-02-07 21:07:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2025-02-07 21:07:14,882 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2025-02-07 21:07:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:07:14,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:07:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 21:07:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 21:07:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 21:07:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 21:07:14,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 21:07:14,934 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:07:14,936 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:07:15,013 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L88: SUMMARY for call func_to_recursive_line_44_to_45_0(~array#1.base, ~array#1.offset, ~index#1.base, ~index#1.offset); srcloc: null [2025-02-07 21:07:15,013 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L84: havoc __VERIFIER_assert_~cond#1;havoc __VERIFIER_assert_#in~cond#1;assume { :end_inline___VERIFIER_assert } true;havoc #t~mem7#1;havoc #t~mem9#1;havoc #t~mem8#1;havoc #t~mem10#1;havoc #t~mem11#1;havoc #t~short12#1;call #t~mem13#1 := read~int#1(~index#1.base, ~index#1.offset, 4);#t~post14#1 := #t~mem13#1;call write~int#1(1 + #t~post14#1, ~index#1.base, ~index#1.offset, 4);havoc #t~mem13#1;havoc #t~post14#1; [2025-02-07 21:07:15,037 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-02-07 21:07:15,037 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:07:15,042 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:07:15,043 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:07:15,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:15 BoogieIcfgContainer [2025-02-07 21:07:15,043 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:07:15,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:07:15,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:07:15,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:07:15,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:07:14" (1/3) ... [2025-02-07 21:07:15,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a32dd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:15, skipping insertion in model container [2025-02-07 21:07:15,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:14" (2/3) ... [2025-02-07 21:07:15,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a32dd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:15, skipping insertion in model container [2025-02-07 21:07:15,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:15" (3/3) ... [2025-02-07 21:07:15,049 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_3.i [2025-02-07 21:07:15,059 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:07:15,060 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_simple_array_index_value_3.i that has 3 procedures, 22 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:07:15,090 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:07:15,097 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;@8032ee2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:07:15,097 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:07:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 21:07:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 21:07:15,103 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:15,104 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:15,104 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] === [2025-02-07 21:07:15,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1397106882, now seen corresponding path program 1 times [2025-02-07 21:07:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:15,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296464154] [2025-02-07 21:07:15,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:15,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:15,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-07 21:07:15,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 21:07:15,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:15,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:15,529 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 21:07:15,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296464154] [2025-02-07 21:07:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296464154] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:15,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:07:15,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:07:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459216934] [2025-02-07 21:07:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:15,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 21:07:15,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:15,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 21:07:15,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 21:07:15,549 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2025-02-07 21:07:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:15,634 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2025-02-07 21:07:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:07:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2025-02-07 21:07:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:15,640 INFO L225 Difference]: With dead ends: 39 [2025-02-07 21:07:15,640 INFO L226 Difference]: Without dead ends: 18 [2025-02-07 21:07:15,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-07 21:07:15,643 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:15,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:07:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-07 21:07:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-02-07 21:07:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2025-02-07 21:07:15,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2025-02-07 21:07:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:15,664 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2025-02-07 21:07:15,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2025-02-07 21:07:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2025-02-07 21:07:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 21:07:15,665 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:15,665 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:15,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:07:15,666 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] === [2025-02-07 21:07:15,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1776011877, now seen corresponding path program 1 times [2025-02-07 21:07:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020448013] [2025-02-07 21:07:15,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:15,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 21:07:15,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 21:07:15,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:15,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020448013] [2025-02-07 21:07:16,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020448013] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921340463] [2025-02-07 21:07:16,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:16,145 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 21:07:16,146 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 21:07:16,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 21:07:16,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 21:07:16,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:16,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:16,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-07 21:07:16,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:16,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921340463] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:16,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:16,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2025-02-07 21:07:16,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299804270] [2025-02-07 21:07:16,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:16,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 21:07:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:16,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 21:07:16,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2025-02-07 21:07:16,704 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2025-02-07 21:07:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:16,875 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2025-02-07 21:07:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:07:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 19 [2025-02-07 21:07:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:16,876 INFO L225 Difference]: With dead ends: 31 [2025-02-07 21:07:16,876 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 21:07:16,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:07:16,877 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:16,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 92 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 21:07:16,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-02-07 21:07:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:07:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-02-07 21:07:16,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2025-02-07 21:07:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:16,882 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-02-07 21:07:16,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2025-02-07 21:07:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-02-07 21:07:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 21:07:16,883 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:16,883 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:16,889 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 21:07:17,087 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 21:07:17,087 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] === [2025-02-07 21:07:17,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash 378115505, now seen corresponding path program 2 times [2025-02-07 21:07:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645436336] [2025-02-07 21:07:17,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:17,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 21:07:17,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 21:07:17,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:17,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 21:07:17,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645436336] [2025-02-07 21:07:17,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645436336] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987795734] [2025-02-07 21:07:17,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:17,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:17,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:17,751 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 21:07:17,752 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 21:07:17,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 21:07:17,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 21:07:17,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:17,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:17,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-07 21:07:17,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 21:07:18,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:31,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987795734] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:31,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:31,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 17] total 34 [2025-02-07 21:07:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899318091] [2025-02-07 21:07:31,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:31,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 21:07:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:31,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 21:07:31,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1035, Unknown=3, NotChecked=0, Total=1190 [2025-02-07 21:07:31,013 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 35 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 29 states have internal predecessors, (38), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2025-02-07 21:07:35,132 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 [] [2025-02-07 21:07:39,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:07:43,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:07:47,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:07,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:11,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:15,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:19,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:23,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:27,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:31,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:47,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:51,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:55,391 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 [] [2025-02-07 21:08:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:55,614 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2025-02-07 21:08:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:08:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 29 states have internal predecessors, (38), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 29 [2025-02-07 21:08:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:55,615 INFO L225 Difference]: With dead ends: 35 [2025-02-07 21:08:55,615 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 21:08:55,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=225, Invalid=1405, Unknown=10, NotChecked=0, Total=1640 [2025-02-07 21:08:55,618 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 10 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:55,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 226 Invalid, 14 Unknown, 0 Unchecked, 56.3s Time] [2025-02-07 21:08:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 21:08:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-07 21:08:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 21:08:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-02-07 21:08:55,622 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 29 [2025-02-07 21:08:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:55,622 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-02-07 21:08:55,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 29 states have internal predecessors, (38), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2025-02-07 21:08:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-02-07 21:08:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 21:08:55,623 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:55,623 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:55,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 21:08:55,824 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 21:08:55,824 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] === [2025-02-07 21:08:55,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:55,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1924756221, now seen corresponding path program 3 times [2025-02-07 21:08:55,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:55,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102352736] [2025-02-07 21:08:55,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:55,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 6 equivalence classes. [2025-02-07 21:08:55,916 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 21:08:55,916 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 21:08:55,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 21:08:56,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:56,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102352736] [2025-02-07 21:08:56,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102352736] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:56,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857798952] [2025-02-07 21:08:56,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:56,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:56,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:56,864 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 21:08:56,865 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 21:08:56,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 6 equivalence classes. [2025-02-07 21:08:57,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 21:08:57,462 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 21:08:57,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:57,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-07 21:08:57,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-07 21:08:57,882 INFO L312 TraceCheckSpWp]: Computing backward predicates...