./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 16:43:23,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 16:43:23,867 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 16:43:23,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 16:43:23,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 16:43:23,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 16:43:23,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 16:43:23,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 16:43:23,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 16:43:23,890 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 16:43:23,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 16:43:23,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 16:43:23,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 16:43:23,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 16:43:23,890 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 16:43:23,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 16:43:23,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 16:43:23,891 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 16:43:23,892 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 16:43:23,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 16:43:23,893 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 16:43:23,893 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 16:43:23,894 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:43:23,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 16:43:23,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 16:43:23,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 16:43:23,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 16:43:23,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 16:43:23,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 16:43:23,895 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 -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2025-02-07 16:43:24,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 16:43:24,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 16:43:24,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 16:43:24,133 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 16:43:24,133 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 16:43:24,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2025-02-07 16:43:25,269 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7bd94a211/1f6c69be800d44009521d70380282107/FLAGe9e122e78 [2025-02-07 16:43:25,457 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 16:43:25,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2025-02-07 16:43:25,464 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7bd94a211/1f6c69be800d44009521d70380282107/FLAGe9e122e78 [2025-02-07 16:43:25,842 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7bd94a211/1f6c69be800d44009521d70380282107 [2025-02-07 16:43:25,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 16:43:25,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 16:43:25,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 16:43:25,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 16:43:25,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 16:43:25,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:43:25" (1/1) ... [2025-02-07 16:43:25,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685f8695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:25, skipping insertion in model container [2025-02-07 16:43:25,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:43:25" (1/1) ... [2025-02-07 16:43:25,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 16:43:25,986 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/array-examples/standard_copy5_ground-2.i[816,829] [2025-02-07 16:43:26,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:43:26,009 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 16:43:26,018 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/array-examples/standard_copy5_ground-2.i[816,829] [2025-02-07 16:43:26,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:43:26,039 INFO L204 MainTranslator]: Completed translation [2025-02-07 16:43:26,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26 WrapperNode [2025-02-07 16:43:26,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 16:43:26,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 16:43:26,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 16:43:26,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 16:43:26,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,065 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2025-02-07 16:43:26,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 16:43:26,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 16:43:26,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 16:43:26,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 16:43:26,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,087 INFO L175 MemorySlicer]: Split 16 memory accesses to 7 slices as follows [2, 2, 2, 3, 2, 2, 3]. 19 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 1, 2, 1, 1, 1]. [2025-02-07 16:43:26,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,093 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 16:43:26,103 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 16:43:26,103 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 16:43:26,103 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 16:43:26,104 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (1/1) ... [2025-02-07 16:43:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:43:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:26,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 16:43:26,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-02-07 16:43:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-02-07 16:43:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 16:43:26,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-02-07 16:43:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 16:43:26,235 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 16:43:26,237 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 16:43:26,376 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a1~0#1.base, main_~#a1~0#1.offset);havoc main_~#a1~0#1.base, main_~#a1~0#1.offset;call ULTIMATE.dealloc(main_~#a2~0#1.base, main_~#a2~0#1.offset);havoc main_~#a2~0#1.base, main_~#a2~0#1.offset;call ULTIMATE.dealloc(main_~#a3~0#1.base, main_~#a3~0#1.offset);havoc main_~#a3~0#1.base, main_~#a3~0#1.offset;call ULTIMATE.dealloc(main_~#a4~0#1.base, main_~#a4~0#1.offset);havoc main_~#a4~0#1.base, main_~#a4~0#1.offset;call ULTIMATE.dealloc(main_~#a5~0#1.base, main_~#a5~0#1.offset);havoc main_~#a5~0#1.base, main_~#a5~0#1.offset;call ULTIMATE.dealloc(main_~#a6~0#1.base, main_~#a6~0#1.offset);havoc main_~#a6~0#1.base, main_~#a6~0#1.offset; [2025-02-07 16:43:26,380 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-02-07 16:43:26,380 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 16:43:26,385 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 16:43:26,385 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 16:43:26,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:43:26 BoogieIcfgContainer [2025-02-07 16:43:26,386 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 16:43:26,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 16:43:26,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 16:43:26,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 16:43:26,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 04:43:25" (1/3) ... [2025-02-07 16:43:26,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e574cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:43:26, skipping insertion in model container [2025-02-07 16:43:26,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:43:26" (2/3) ... [2025-02-07 16:43:26,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e574cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:43:26, skipping insertion in model container [2025-02-07 16:43:26,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:43:26" (3/3) ... [2025-02-07 16:43:26,393 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2025-02-07 16:43:26,404 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 16:43:26,406 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_copy5_ground-2.i that has 1 procedures, 15 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-02-07 16:43:26,442 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 16:43:26,455 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;@3cb27ce6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 16:43:26,455 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 16:43:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 16:43:26,464 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:26,465 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:26,465 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:26,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash -581462951, now seen corresponding path program 1 times [2025-02-07 16:43:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:26,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805519806] [2025-02-07 16:43:26,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:43:26,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:26,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 16:43:26,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 16:43:26,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:43:26,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:43:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:26,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805519806] [2025-02-07 16:43:26,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805519806] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:43:26,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:43:26,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 16:43:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898937014] [2025-02-07 16:43:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:43:26,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:43:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:26,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:43:26,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:43:26,690 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:26,709 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2025-02-07 16:43:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:43:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-07 16:43:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:26,715 INFO L225 Difference]: With dead ends: 29 [2025-02-07 16:43:26,715 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 16:43:26,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:43:26,720 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:26,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:43:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 16:43:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-02-07 16:43:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-02-07 16:43:26,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2025-02-07 16:43:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:26,746 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-02-07 16:43:26,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-02-07 16:43:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 16:43:26,747 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:26,747 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:26,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 16:43:26,748 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:26,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 662860398, now seen corresponding path program 1 times [2025-02-07 16:43:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463634332] [2025-02-07 16:43:26,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:43:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:26,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 16:43:26,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:43:26,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:43:26,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:43:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463634332] [2025-02-07 16:43:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463634332] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144079963] [2025-02-07 16:43:26,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:43:26,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:26,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:26,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 16:43:26,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 16:43:26,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:43:26,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:43:26,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:26,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-07 16:43:26,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:43:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:43:26,968 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 16:43:26,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144079963] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:43:26,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 16:43:26,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2025-02-07 16:43:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242416043] [2025-02-07 16:43:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:43:26,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:43:26,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:26,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:43:26,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:43:26,970 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:26,993 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2025-02-07 16:43:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:43:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 16:43:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:26,994 INFO L225 Difference]: With dead ends: 27 [2025-02-07 16:43:26,994 INFO L226 Difference]: Without dead ends: 18 [2025-02-07 16:43:26,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:43:26,995 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:26,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:43:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-07 16:43:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-02-07 16:43:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2025-02-07 16:43:26,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2025-02-07 16:43:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:26,998 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2025-02-07 16:43:26,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2025-02-07 16:43:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 16:43:26,999 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:26,999 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:27,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 16:43:27,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:27,200 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:27,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1084376025, now seen corresponding path program 1 times [2025-02-07 16:43:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:27,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836248043] [2025-02-07 16:43:27,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:43:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:27,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 16:43:27,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 16:43:27,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:43:27,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 16:43:27,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:27,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836248043] [2025-02-07 16:43:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836248043] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312255298] [2025-02-07 16:43:27,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:43:27,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:27,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:27,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 16:43:27,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 16:43:27,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 16:43:27,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:43:27,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:27,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-07 16:43:27,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:43:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 16:43:27,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:43:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 16:43:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312255298] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:43:27,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:43:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-07 16:43:27,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995773658] [2025-02-07 16:43:27,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:43:27,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 16:43:27,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:27,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 16:43:27,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:43:27,454 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:27,468 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2025-02-07 16:43:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 16:43:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-07 16:43:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:27,469 INFO L225 Difference]: With dead ends: 36 [2025-02-07 16:43:27,469 INFO L226 Difference]: Without dead ends: 21 [2025-02-07 16:43:27,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:43:27,470 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:27,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:43:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-07 16:43:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-02-07 16:43:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2025-02-07 16:43:27,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2025-02-07 16:43:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:27,473 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2025-02-07 16:43:27,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2025-02-07 16:43:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 16:43:27,473 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:27,473 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:27,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 16:43:27,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:27,674 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:27,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1620281230, now seen corresponding path program 2 times [2025-02-07 16:43:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547101327] [2025-02-07 16:43:27,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:43:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:27,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:43:27,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:43:27,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:43:27,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 16:43:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547101327] [2025-02-07 16:43:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547101327] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513536993] [2025-02-07 16:43:27,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:43:27,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:27,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:27,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:27,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 16:43:27,834 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:43:27,860 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:43:27,860 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:43:27,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:27,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 16:43:27,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:43:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 16:43:27,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:43:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 16:43:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513536993] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:43:27,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:43:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2025-02-07 16:43:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039763220] [2025-02-07 16:43:27,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:43:27,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 16:43:27,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:27,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 16:43:27,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:43:27,977 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:28,041 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2025-02-07 16:43:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 16:43:28,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 16:43:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:28,042 INFO L225 Difference]: With dead ends: 47 [2025-02-07 16:43:28,042 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 16:43:28,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:43:28,043 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:28,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:43:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 16:43:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 16:43:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2025-02-07 16:43:28,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2025-02-07 16:43:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:28,050 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2025-02-07 16:43:28,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2025-02-07 16:43:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 16:43:28,050 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:28,050 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:28,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 16:43:28,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:28,251 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:28,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash 340400793, now seen corresponding path program 3 times [2025-02-07 16:43:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540298034] [2025-02-07 16:43:28,252 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:43:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:28,269 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 6 equivalence classes. [2025-02-07 16:43:28,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 30 statements. [2025-02-07 16:43:28,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 16:43:28,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-07 16:43:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540298034] [2025-02-07 16:43:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540298034] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677665371] [2025-02-07 16:43:28,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:43:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:28,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:28,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 16:43:28,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 6 equivalence classes. [2025-02-07 16:43:28,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 30 statements. [2025-02-07 16:43:28,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 16:43:28,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:28,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 16:43:28,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:43:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-07 16:43:28,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:43:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-07 16:43:28,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677665371] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:43:28,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:43:28,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-07 16:43:28,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437455803] [2025-02-07 16:43:28,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:43:28,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 16:43:28,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:28,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 16:43:28,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-07 16:43:28,496 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:28,566 INFO L93 Difference]: Finished difference Result 69 states and 99 transitions. [2025-02-07 16:43:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 16:43:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 16:43:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:28,567 INFO L225 Difference]: With dead ends: 69 [2025-02-07 16:43:28,567 INFO L226 Difference]: Without dead ends: 52 [2025-02-07 16:43:28,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-07 16:43:28,567 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:28,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:43:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-07 16:43:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-02-07 16:43:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2025-02-07 16:43:28,572 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 30 [2025-02-07 16:43:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:28,572 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2025-02-07 16:43:28,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2025-02-07 16:43:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 16:43:28,573 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:28,573 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:28,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 16:43:28,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:28,774 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:28,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1443105575, now seen corresponding path program 4 times [2025-02-07 16:43:28,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063485339] [2025-02-07 16:43:28,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:43:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:28,796 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-07 16:43:28,812 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 16:43:28,812 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:43:28,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 16:43:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063485339] [2025-02-07 16:43:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063485339] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:29,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965138470] [2025-02-07 16:43:29,080 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:43:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:29,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 16:43:29,170 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-07 16:43:29,228 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 16:43:29,229 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:43:29,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:29,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:43:29,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:43:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 16:43:29,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:43:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 16:43:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965138470] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:43:29,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:43:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2025-02-07 16:43:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863171182] [2025-02-07 16:43:29,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:43:29,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 16:43:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:43:29,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 16:43:29,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:43:29,447 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:43:29,474 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2025-02-07 16:43:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 16:43:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 16:43:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:43:29,475 INFO L225 Difference]: With dead ends: 104 [2025-02-07 16:43:29,475 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 16:43:29,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:43:29,476 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:43:29,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:43:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 16:43:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-02-07 16:43:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2025-02-07 16:43:29,489 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 50 [2025-02-07 16:43:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:43:29,489 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2025-02-07 16:43:29,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:43:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2025-02-07 16:43:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 16:43:29,490 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:43:29,490 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:43:29,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 16:43:29,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:29,691 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:43:29,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:43:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2009820313, now seen corresponding path program 5 times [2025-02-07 16:43:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:43:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290306663] [2025-02-07 16:43:29,692 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:43:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:43:29,719 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 12 equivalence classes. [2025-02-07 16:43:29,896 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 16:43:29,896 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 16:43:29,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:43:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 16:43:30,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:43:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290306663] [2025-02-07 16:43:30,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290306663] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:43:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653132220] [2025-02-07 16:43:30,499 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:43:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:43:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:43:30,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:43:30,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 16:43:30,590 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 12 equivalence classes.