./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:01:34,693 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:01:34,747 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:01:34,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:01:34,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:01:34,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:01:34,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:01:34,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:01:34,771 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:01:34,771 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:01:34,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:01:34,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:01:34,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:01:34,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:01:34,773 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:01:34,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:01:34,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:01:34,773 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:01:34,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:01:34,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:01:34,774 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:01:34,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:34,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:01:34,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:01:34,775 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 -> 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 [2025-02-05 16:01:34,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:01:34,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:01:34,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:01:34,996 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:01:34,996 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:01:34,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2025-02-05 16:01:36,151 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9d6f1915/47cc80dc33354b3c95190cd50a4bf0ec/FLAG7d1159cc6 [2025-02-05 16:01:36,364 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:01:36,365 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2025-02-05 16:01:36,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9d6f1915/47cc80dc33354b3c95190cd50a4bf0ec/FLAG7d1159cc6 [2025-02-05 16:01:36,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9d6f1915/47cc80dc33354b3c95190cd50a4bf0ec [2025-02-05 16:01:36,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:01:36,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:01:36,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:36,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:01:36,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:01:36,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f13e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36, skipping insertion in model container [2025-02-05 16:01:36,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,747 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:01:36,848 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c[2333,2346] [2025-02-05 16:01:36,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:36,857 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:01:36,871 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c[2333,2346] [2025-02-05 16:01:36,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:36,883 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:01:36,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36 WrapperNode [2025-02-05 16:01:36,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:36,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:36,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:01:36,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:01:36,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,904 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2025-02-05 16:01:36,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:36,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:01:36,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:01:36,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:01:36,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,926 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 6, 6, 6, 6]. 23 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 8 writes are split as follows [0, 2, 2, 2, 2]. [2025-02-05 16:01:36,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,929 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:01:36,933 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:01:36,933 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:01:36,933 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:01:36,934 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (1/1) ... [2025-02-05 16:01:36,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:36,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 16:01:36,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 16:01:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:01:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:01:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:01:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:01:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2025-02-05 16:01:36,992 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2025-02-05 16:01:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2025-02-05 16:01:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2025-02-05 16:01:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2025-02-05 16:01:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2025-02-05 16:01:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_25_0 [2025-02-05 16:01:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_25_0 [2025-02-05 16:01:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:01:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:01:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:01:37,074 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:01:37,076 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:01:37,197 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L101: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset;call ULTIMATE.dealloc(main_~#d~0#1.base, main_~#d~0#1.offset);havoc main_~#d~0#1.base, main_~#d~0#1.offset; [2025-02-05 16:01:37,210 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-02-05 16:01:37,210 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:01:37,215 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:01:37,216 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:01:37,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:37 BoogieIcfgContainer [2025-02-05 16:01:37,216 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:01:37,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:01:37,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:01:37,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:01:37,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:01:36" (1/3) ... [2025-02-05 16:01:37,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c1de61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:37, skipping insertion in model container [2025-02-05 16:01:37,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:36" (2/3) ... [2025-02-05 16:01:37,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c1de61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:37, skipping insertion in model container [2025-02-05 16:01:37,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:37" (3/3) ... [2025-02-05 16:01:37,222 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_4.c [2025-02-05 16:01:37,232 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:01:37,233 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_4.c that has 5 procedures, 42 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:01:37,269 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:01:37,279 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;@64bb89c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:01:37,280 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:01:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 16:01:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 16:01:37,290 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:37,290 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:37,291 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:37,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -257936065, now seen corresponding path program 1 times [2025-02-05 16:01:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:37,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231143387] [2025-02-05 16:01:37,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:37,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:37,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 16:01:37,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 16:01:37,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:37,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:37,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231143387] [2025-02-05 16:01:37,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231143387] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:37,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:37,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 16:01:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640336176] [2025-02-05 16:01:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:37,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 16:01:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:37,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 16:01:37,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 16:01:37,725 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:37,898 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2025-02-05 16:01:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 16:01:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-02-05 16:01:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:37,904 INFO L225 Difference]: With dead ends: 57 [2025-02-05 16:01:37,904 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 16:01:37,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:37,907 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:37,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 16:01:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 16:01:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-05 16:01:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2025-02-05 16:01:37,932 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2025-02-05 16:01:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:37,933 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2025-02-05 16:01:37,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2025-02-05 16:01:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 16:01:37,934 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:37,934 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:37,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:01:37,935 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:37,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1338134008, now seen corresponding path program 1 times [2025-02-05 16:01:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860779052] [2025-02-05 16:01:37,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:37,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 16:01:37,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 16:01:37,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:37,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 16:01:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860779052] [2025-02-05 16:01:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860779052] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:38,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:38,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 16:01:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536031801] [2025-02-05 16:01:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:38,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 16:01:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:38,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 16:01:38,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 16:01:38,156 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:01:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:38,245 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2025-02-05 16:01:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 16:01:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2025-02-05 16:01:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:38,246 INFO L225 Difference]: With dead ends: 79 [2025-02-05 16:01:38,246 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 16:01:38,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:38,247 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:38,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 16:01:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-02-05 16:01:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2025-02-05 16:01:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2025-02-05 16:01:38,252 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2025-02-05 16:01:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:38,252 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2025-02-05 16:01:38,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:01:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2025-02-05 16:01:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 16:01:38,253 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:38,253 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:38,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 16:01:38,253 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:38,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1204084236, now seen corresponding path program 1 times [2025-02-05 16:01:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:38,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930643360] [2025-02-05 16:01:38,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:38,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 16:01:38,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 16:01:38,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:38,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:01:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:38,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930643360] [2025-02-05 16:01:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930643360] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:38,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 16:01:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971684864] [2025-02-05 16:01:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:38,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 16:01:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:38,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 16:01:38,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 16:01:38,452 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 16:01:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:38,536 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2025-02-05 16:01:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 16:01:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2025-02-05 16:01:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:38,538 INFO L225 Difference]: With dead ends: 83 [2025-02-05 16:01:38,539 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 16:01:38,539 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:38,540 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:38,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 16:01:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-02-05 16:01:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.25) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-02-05 16:01:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-02-05 16:01:38,547 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 37 [2025-02-05 16:01:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:38,547 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-02-05 16:01:38,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 16:01:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-02-05 16:01:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-05 16:01:38,549 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:38,549 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:38,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 16:01:38,550 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:38,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash -681955355, now seen corresponding path program 1 times [2025-02-05 16:01:38,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:38,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453407886] [2025-02-05 16:01:38,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:38,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:38,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-05 16:01:38,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 16:01:38,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:38,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 16:01:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:38,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453407886] [2025-02-05 16:01:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453407886] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 16:01:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516966345] [2025-02-05 16:01:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:38,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 16:01:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:38,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 16:01:38,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 16:01:38,743 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2025-02-05 16:01:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:38,805 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2025-02-05 16:01:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 16:01:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2025-02-05 16:01:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:38,807 INFO L225 Difference]: With dead ends: 87 [2025-02-05 16:01:38,807 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 16:01:38,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:38,808 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:38,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:01:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 16:01:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-05 16:01:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-05 16:01:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2025-02-05 16:01:38,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 48 [2025-02-05 16:01:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:38,819 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2025-02-05 16:01:38,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2025-02-05 16:01:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2025-02-05 16:01:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 16:01:38,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:38,821 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:38,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-05 16:01:38,821 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:38,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1367415055, now seen corresponding path program 1 times [2025-02-05 16:01:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:38,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146044212] [2025-02-05 16:01:38,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:38,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-05 16:01:38,840 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 16:01:38,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:38,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 16:01:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:39,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146044212] [2025-02-05 16:01:39,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146044212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:39,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585604118] [2025-02-05 16:01:39,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:39,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:39,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:39,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 16:01:39,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-05 16:01:39,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 16:01:39,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:39,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:39,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 16:01:39,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:39,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 16:01:39,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 16:01:40,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585604118] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:40,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 25 [2025-02-05 16:01:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208103998] [2025-02-05 16:01:40,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:40,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 16:01:40,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:40,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 16:01:40,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2025-02-05 16:01:40,316 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2025-02-05 16:01:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:40,823 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2025-02-05 16:01:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 16:01:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 53 [2025-02-05 16:01:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:40,824 INFO L225 Difference]: With dead ends: 96 [2025-02-05 16:01:40,826 INFO L226 Difference]: Without dead ends: 53 [2025-02-05 16:01:40,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 16:01:40,827 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:40,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 124 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:01:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-05 16:01:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2025-02-05 16:01:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 16:01:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2025-02-05 16:01:40,832 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 53 [2025-02-05 16:01:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:40,832 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2025-02-05 16:01:40,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2025-02-05 16:01:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2025-02-05 16:01:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-05 16:01:40,833 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:40,833 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:40,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 16:01:41,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:41,034 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:41,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash -280039860, now seen corresponding path program 1 times [2025-02-05 16:01:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047667038] [2025-02-05 16:01:41,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:41,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-05 16:01:41,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-05 16:01:41,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:41,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 16:01:41,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047667038] [2025-02-05 16:01:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047667038] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:41,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 16:01:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881584157] [2025-02-05 16:01:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:41,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 16:01:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:41,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 16:01:41,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 16:01:41,096 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-05 16:01:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:41,113 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2025-02-05 16:01:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 16:01:41,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2025-02-05 16:01:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:41,115 INFO L225 Difference]: With dead ends: 60 [2025-02-05 16:01:41,115 INFO L226 Difference]: Without dead ends: 55 [2025-02-05 16:01:41,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 16:01:41,116 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:41,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:01:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-05 16:01:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2025-02-05 16:01:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 16:01:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2025-02-05 16:01:41,123 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 58 [2025-02-05 16:01:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:41,123 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2025-02-05 16:01:41,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-05 16:01:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2025-02-05 16:01:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-05 16:01:41,124 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:41,124 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:41,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-05 16:01:41,125 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:41,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash -279116339, now seen corresponding path program 1 times [2025-02-05 16:01:41,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:41,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109653661] [2025-02-05 16:01:41,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:41,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-05 16:01:41,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-05 16:01:41,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:41,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 16:01:41,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:41,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109653661] [2025-02-05 16:01:41,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109653661] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:41,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:41,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 16:01:41,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797892787] [2025-02-05 16:01:41,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:41,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 16:01:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:41,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 16:01:41,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 16:01:41,184 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-05 16:01:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:41,200 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2025-02-05 16:01:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 16:01:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2025-02-05 16:01:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:41,202 INFO L225 Difference]: With dead ends: 60 [2025-02-05 16:01:41,202 INFO L226 Difference]: Without dead ends: 57 [2025-02-05 16:01:41,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 16:01:41,202 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:41,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:01:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-05 16:01:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2025-02-05 16:01:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 40 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 16:01:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-02-05 16:01:41,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 58 [2025-02-05 16:01:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:41,210 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-02-05 16:01:41,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-05 16:01:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-02-05 16:01:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-05 16:01:41,211 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:41,211 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:41,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-05 16:01:41,211 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:41,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -279115378, now seen corresponding path program 1 times [2025-02-05 16:01:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438845527] [2025-02-05 16:01:41,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:41,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-05 16:01:41,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-05 16:01:41,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:41,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 16:01:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438845527] [2025-02-05 16:01:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438845527] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75402628] [2025-02-05 16:01:41,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:41,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:41,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 16:01:41,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-05 16:01:41,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-05 16:01:41,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:41,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:41,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-05 16:01:41,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:41,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:01:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:01:41,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 16:01:42,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75402628] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:42,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:42,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2025-02-05 16:01:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226884974] [2025-02-05 16:01:42,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:42,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 16:01:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:42,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 16:01:42,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2025-02-05 16:01:42,444 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-02-05 16:01:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:42,825 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2025-02-05 16:01:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 16:01:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) Word has length 58 [2025-02-05 16:01:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:42,827 INFO L225 Difference]: With dead ends: 113 [2025-02-05 16:01:42,828 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 16:01:42,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 16:01:42,830 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:42,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 400 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:01:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 16:01:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-02-05 16:01:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 8 states have call successors, (8), 4 states have call predecessors, (8), 12 states have return successors, (17), 13 states have call predecessors, (17), 8 states have call successors, (17) [2025-02-05 16:01:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2025-02-05 16:01:42,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 58 [2025-02-05 16:01:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:42,840 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2025-02-05 16:01:42,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-02-05 16:01:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2025-02-05 16:01:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-02-05 16:01:42,842 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:42,843 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:42,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:43,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:43,043 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:43,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1644516669, now seen corresponding path program 2 times [2025-02-05 16:01:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188361965] [2025-02-05 16:01:43,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:43,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 89 statements into 2 equivalence classes. [2025-02-05 16:01:43,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 89 of 89 statements. [2025-02-05 16:01:43,068 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:43,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-02-05 16:01:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188361965] [2025-02-05 16:01:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188361965] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758592031] [2025-02-05 16:01:43,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:43,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:43,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 16:01:43,629 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 89 statements into 2 equivalence classes. [2025-02-05 16:01:43,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 89 of 89 statements. [2025-02-05 16:01:43,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:43,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 16:01:43,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:43,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-02-05 16:01:43,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 8 proven. 103 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 16:01:45,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758592031] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:45,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:45,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 18] total 33 [2025-02-05 16:01:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045602341] [2025-02-05 16:01:45,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:45,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 16:01:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:45,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 16:01:45,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 16:01:45,480 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 33 states, 25 states have (on average 2.92) internal successors, (73), 28 states have internal predecessors, (73), 10 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-02-05 16:01:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:45,721 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2025-02-05 16:01:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 16:01:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.92) internal successors, (73), 28 states have internal predecessors, (73), 10 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 89 [2025-02-05 16:01:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:45,722 INFO L225 Difference]: With dead ends: 121 [2025-02-05 16:01:45,722 INFO L226 Difference]: Without dead ends: 64 [2025-02-05 16:01:45,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 16:01:45,725 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:45,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 414 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-05 16:01:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-02-05 16:01:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 8 states have call successors, (8), 4 states have call predecessors, (8), 14 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2025-02-05 16:01:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2025-02-05 16:01:45,734 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 89 [2025-02-05 16:01:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:45,734 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2025-02-05 16:01:45,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.92) internal successors, (73), 28 states have internal predecessors, (73), 10 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-02-05 16:01:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2025-02-05 16:01:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-05 16:01:45,735 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:45,736 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:45,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 16:01:45,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:45,937 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:45,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 541770825, now seen corresponding path program 3 times [2025-02-05 16:01:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:45,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723387653] [2025-02-05 16:01:45,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:01:45,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:45,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-05 16:01:45,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 109 statements. [2025-02-05 16:01:45,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 16:01:45,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2025-02-05 16:01:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:46,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723387653] [2025-02-05 16:01:46,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723387653] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:46,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693965628] [2025-02-05 16:01:46,109 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:01:46,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:46,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:46,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 16:01:46,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-05 16:01:46,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 109 statements. [2025-02-05 16:01:46,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 16:01:46,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:46,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 16:01:46,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:46,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2025-02-05 16:01:46,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2025-02-05 16:01:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693965628] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:46,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2025-02-05 16:01:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614603030] [2025-02-05 16:01:46,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:46,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 16:01:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:46,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 16:01:46,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-02-05 16:01:46,722 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 16:01:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:46,926 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2025-02-05 16:01:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:01:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) Word has length 109 [2025-02-05 16:01:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:46,927 INFO L225 Difference]: With dead ends: 79 [2025-02-05 16:01:46,927 INFO L226 Difference]: Without dead ends: 64 [2025-02-05 16:01:46,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2025-02-05 16:01:46,928 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:46,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 158 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-05 16:01:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-02-05 16:01:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2025-02-05 16:01:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2025-02-05 16:01:46,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 109 [2025-02-05 16:01:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:46,933 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2025-02-05 16:01:46,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 16:01:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2025-02-05 16:01:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2025-02-05 16:01:46,935 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:46,935 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 30, 30, 30, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:46,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:47,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-05 16:01:47,139 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:47,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1692264404, now seen corresponding path program 2 times [2025-02-05 16:01:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116712599] [2025-02-05 16:01:47,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:47,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 297 statements into 2 equivalence classes. [2025-02-05 16:01:47,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-02-05 16:01:47,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:47,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3246 backedges. 71 proven. 65 refuted. 0 times theorem prover too weak. 3110 trivial. 0 not checked. [2025-02-05 16:01:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116712599] [2025-02-05 16:01:47,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116712599] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472650707] [2025-02-05 16:01:47,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:47,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:47,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:47,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:47,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 16:01:48,080 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 297 statements into 2 equivalence classes. [2025-02-05 16:01:48,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-02-05 16:01:48,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:48,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:48,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-05 16:01:48,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:48,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3246 backedges. 1650 proven. 35 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2025-02-05 16:01:48,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3246 backedges. 728 proven. 242 refuted. 0 times theorem prover too weak. 2276 trivial. 0 not checked. [2025-02-05 16:01:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472650707] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:52,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 26] total 47 [2025-02-05 16:01:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602750973] [2025-02-05 16:01:52,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:52,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-05 16:01:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:52,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-05 16:01:52,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 16:01:52,263 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 47 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 39 states have internal predecessors, (88), 15 states have call successors, (29), 10 states have call predecessors, (29), 17 states have return successors, (36), 16 states have call predecessors, (36), 15 states have call successors, (36) [2025-02-05 16:01:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:52,773 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2025-02-05 16:01:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 16:01:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 39 states have internal predecessors, (88), 15 states have call successors, (29), 10 states have call predecessors, (29), 17 states have return successors, (36), 16 states have call predecessors, (36), 15 states have call successors, (36) Word has length 297 [2025-02-05 16:01:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:52,775 INFO L225 Difference]: With dead ends: 129 [2025-02-05 16:01:52,775 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 16:01:52,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=586, Invalid=3196, Unknown=0, NotChecked=0, Total=3782 [2025-02-05 16:01:52,777 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:52,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 455 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:01:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 16:01:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-05 16:01:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 46 states have internal predecessors, (49), 8 states have call successors, (8), 4 states have call predecessors, (8), 17 states have return successors, (21), 17 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-05 16:01:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2025-02-05 16:01:52,786 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 297 [2025-02-05 16:01:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:52,786 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2025-02-05 16:01:52,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 39 states have internal predecessors, (88), 15 states have call successors, (29), 10 states have call predecessors, (29), 17 states have return successors, (36), 16 states have call predecessors, (36), 15 states have call successors, (36) [2025-02-05 16:01:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2025-02-05 16:01:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2025-02-05 16:01:52,793 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:52,793 INFO L218 NwaCegarLoop]: trace histogram [63, 63, 54, 54, 54, 12, 12, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:52,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:52,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-05 16:01:52,994 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:52,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1495385747, now seen corresponding path program 3 times [2025-02-05 16:01:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535131167] [2025-02-05 16:01:52,995 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:01:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:53,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 450 statements into 14 equivalence classes. [2025-02-05 16:01:53,039 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 48 of 450 statements. [2025-02-05 16:01:53,039 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 16:01:53,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9717 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 9664 trivial. 0 not checked. [2025-02-05 16:01:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535131167] [2025-02-05 16:01:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535131167] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594346687] [2025-02-05 16:01:53,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:01:53,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:53,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:53,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:53,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 16:01:53,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 450 statements into 14 equivalence classes. [2025-02-05 16:01:53,439 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 48 of 450 statements. [2025-02-05 16:01:53,439 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 16:01:53,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:53,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-05 16:01:53,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:53,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:01:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9717 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 9662 trivial. 0 not checked. [2025-02-05 16:01:53,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9717 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 9663 trivial. 0 not checked. [2025-02-05 16:01:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594346687] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:55,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:55,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-02-05 16:01:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913878549] [2025-02-05 16:01:55,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:55,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 16:01:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:55,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 16:01:55,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2025-02-05 16:01:55,162 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2025-02-05 16:01:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:55,364 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2025-02-05 16:01:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 16:01:55,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) Word has length 450 [2025-02-05 16:01:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:55,365 INFO L225 Difference]: With dead ends: 137 [2025-02-05 16:01:55,365 INFO L226 Difference]: Without dead ends: 72 [2025-02-05 16:01:55,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2025-02-05 16:01:55,366 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:55,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 224 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-05 16:01:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-02-05 16:01:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 19 states have return successors, (23), 19 states have call predecessors, (23), 8 states have call successors, (23) [2025-02-05 16:01:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2025-02-05 16:01:55,372 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 450 [2025-02-05 16:01:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:55,373 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2025-02-05 16:01:55,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2025-02-05 16:01:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2025-02-05 16:01:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1255 [2025-02-05 16:01:55,399 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:55,399 INFO L218 NwaCegarLoop]: trace histogram [189, 189, 162, 162, 162, 36, 36, 27, 27, 27, 27, 27, 27, 27, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:55,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 16:01:55,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 16:01:55,600 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:55,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2110796985, now seen corresponding path program 4 times [2025-02-05 16:01:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:55,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265447637] [2025-02-05 16:01:55,600 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:01:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:55,668 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1254 statements into 2 equivalence classes. [2025-02-05 16:01:55,788 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1253 of 1254 statements. [2025-02-05 16:01:55,788 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 16:01:55,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 88083 backedges. 20 proven. 788 refuted. 0 times theorem prover too weak. 87275 trivial. 0 not checked. [2025-02-05 16:02:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265447637] [2025-02-05 16:02:01,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265447637] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48332109] [2025-02-05 16:02:01,162 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:02:01,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:01,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:01,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 16:02:01,538 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1254 statements into 2 equivalence classes. [2025-02-05 16:02:02,050 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1253 of 1254 statements. [2025-02-05 16:02:02,051 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 16:02:02,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:02,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 5370 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-05 16:02:02,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:02,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:02:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 88083 backedges. 44158 proven. 15 refuted. 0 times theorem prover too weak. 43910 trivial. 0 not checked. [2025-02-05 16:02:02,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88083 backedges. 410 proven. 427 refuted. 0 times theorem prover too weak. 87246 trivial. 0 not checked. [2025-02-05 16:02:07,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48332109] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:07,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:07,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 18] total 35 [2025-02-05 16:02:07,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604135402] [2025-02-05 16:02:07,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:07,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-05 16:02:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:07,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-05 16:02:07,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 16:02:07,723 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 35 states, 26 states have (on average 3.230769230769231) internal successors, (84), 30 states have internal predecessors, (84), 16 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (37), 14 states have call predecessors, (37), 16 states have call successors, (37) [2025-02-05 16:02:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:07,953 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2025-02-05 16:02:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 16:02:07,953 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 3.230769230769231) internal successors, (84), 30 states have internal predecessors, (84), 16 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (37), 14 states have call predecessors, (37), 16 states have call successors, (37) Word has length 1254 [2025-02-05 16:02:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:07,954 INFO L225 Difference]: With dead ends: 145 [2025-02-05 16:02:07,954 INFO L226 Difference]: Without dead ends: 76 [2025-02-05 16:02:07,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2532 GetRequests, 2491 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=1304, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 16:02:07,955 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:07,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 345 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:02:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-05 16:02:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-02-05 16:02:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 8 states have call successors, (8), 4 states have call predecessors, (8), 21 states have return successors, (25), 21 states have call predecessors, (25), 8 states have call successors, (25) [2025-02-05 16:02:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2025-02-05 16:02:07,960 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 1254 [2025-02-05 16:02:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:07,961 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2025-02-05 16:02:07,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 3.230769230769231) internal successors, (84), 30 states have internal predecessors, (84), 16 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (37), 14 states have call predecessors, (37), 16 states have call successors, (37) [2025-02-05 16:02:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2025-02-05 16:02:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1993 [2025-02-05 16:02:07,975 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:07,975 INFO L218 NwaCegarLoop]: trace histogram [315, 315, 270, 270, 270, 54, 54, 45, 45, 45, 45, 45, 45, 45, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:07,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 16:02:08,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:08,176 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:08,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1086993301, now seen corresponding path program 5 times [2025-02-05 16:02:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804305056] [2025-02-05 16:02:08,177 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 16:02:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:08,321 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1992 statements into 36 equivalence classes. [2025-02-05 16:02:11,381 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) and asserted 1829 of 1992 statements. [2025-02-05 16:02:11,381 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2025-02-05 16:02:11,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat