./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.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_6.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 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:01:40,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:01:40,217 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:01:40,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:01:40,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:01:40,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:01:40,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:01:40,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:01:40,235 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:01:40,235 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:01:40,235 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:01:40,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:01:40,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:01:40,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:01:40,236 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:01:40,237 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:01:40,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:40,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:01:40,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:01:40,238 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 -> 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c [2025-02-05 16:01:40,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:01:40,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:01:40,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:01:40,468 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:01:40,468 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:01:40,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2025-02-05 16:01:41,698 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bccd64461/a69a0ed758aa42708dc4981724d66c65/FLAG26256b30d [2025-02-05 16:01:41,984 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:01:41,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2025-02-05 16:01:41,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bccd64461/a69a0ed758aa42708dc4981724d66c65/FLAG26256b30d [2025-02-05 16:01:42,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bccd64461/a69a0ed758aa42708dc4981724d66c65 [2025-02-05 16:01:42,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:01:42,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:01:42,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:42,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:01:42,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:01:42,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28278204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42, skipping insertion in model container [2025-02-05 16:01:42,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,313 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:01:42,431 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_6.c[2667,2680] [2025-02-05 16:01:42,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:42,443 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:01:42,463 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_6.c[2667,2680] [2025-02-05 16:01:42,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:42,478 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:01:42,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42 WrapperNode [2025-02-05 16:01:42,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:42,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:42,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:01:42,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:01:42,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,502 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2025-02-05 16:01:42,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:42,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:01:42,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:01:42,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:01:42,511 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,514 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,538 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 16:01:42,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,544 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:01:42,557 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:01:42,557 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:01:42,558 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:01:42,558 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (1/1) ... [2025-02-05 16:01:42,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:42,591 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 16:01:42,596 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 16:01:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_28_0 [2025-02-05 16:01:42,620 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_28_0 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:01:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2025-02-05 16:01:42,621 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_28_0 [2025-02-05 16:01:42,621 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_28_0 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:01:42,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:01:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:01:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:01:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:01:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2025-02-05 16:01:42,622 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2025-02-05 16:01:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:01:42,702 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:01:42,704 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:01:42,906 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L103: call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset;call ULTIMATE.dealloc(main_~#d~0#1.base, main_~#d~0#1.offset);havoc main_~#d~0#1.base, main_~#d~0#1.offset;call ULTIMATE.dealloc(main_~#e~0#1.base, main_~#e~0#1.offset);havoc main_~#e~0#1.base, main_~#e~0#1.offset;call ULTIMATE.dealloc(main_~#f~0#1.base, main_~#f~0#1.offset);havoc main_~#f~0#1.base, main_~#f~0#1.offset; [2025-02-05 16:01:42,941 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-02-05 16:01:42,943 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:01:42,952 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:01:42,953 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:01:42,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:42 BoogieIcfgContainer [2025-02-05 16:01:42,954 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:01:42,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:01:42,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:01:42,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:01:42,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:01:42" (1/3) ... [2025-02-05 16:01:42,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365c7b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:42, skipping insertion in model container [2025-02-05 16:01:42,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:42" (2/3) ... [2025-02-05 16:01:42,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365c7b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:42, skipping insertion in model container [2025-02-05 16:01:42,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:42" (3/3) ... [2025-02-05 16:01:42,961 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_6.c [2025-02-05 16:01:42,973 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:01:42,975 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_6.c that has 5 procedures, 46 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 16:01:43,020 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:01:43,029 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;@67ce5d32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:01:43,029 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:01:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 32 states have (on average 1.375) internal successors, (44), 37 states have internal predecessors, (44), 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 16:01:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 16:01:43,036 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:43,036 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:43,037 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:43,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 978872887, now seen corresponding path program 1 times [2025-02-05 16:01:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:43,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757259932] [2025-02-05 16:01:43,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:43,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 16:01:43,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 16:01:43,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:43,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,193 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 16:01:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757259932] [2025-02-05 16:01:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757259932] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:43,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 16:01:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788553486] [2025-02-05 16:01:43,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:43,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 16:01:43,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:43,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 16:01:43,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 16:01:43,220 INFO L87 Difference]: Start difference. First operand has 46 states, 32 states have (on average 1.375) internal successors, (44), 37 states have internal predecessors, (44), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-02-05 16:01:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:43,250 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2025-02-05 16:01:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 16:01:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2025-02-05 16:01:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:43,255 INFO L225 Difference]: With dead ends: 64 [2025-02-05 16:01:43,255 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 16:01:43,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 16:01:43,260 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:43,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 111 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:01:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 16:01:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2025-02-05 16:01:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 34 states have internal predecessors, (40), 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 16:01:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2025-02-05 16:01:43,288 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 12 [2025-02-05 16:01:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:43,288 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2025-02-05 16:01:43,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-02-05 16:01:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2025-02-05 16:01:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 16:01:43,289 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:43,289 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:43,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:01:43,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:43,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1616352403, now seen corresponding path program 1 times [2025-02-05 16:01:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753989357] [2025-02-05 16:01:43,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:43,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 16:01:43,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 16:01:43,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:43,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:43,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753989357] [2025-02-05 16:01:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753989357] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:43,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:43,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 16:01:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105551009] [2025-02-05 16:01:43,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:43,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 16:01:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:43,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 16:01:43,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 16:01:43,391 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-02-05 16:01:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:43,409 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2025-02-05 16:01:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 16:01:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2025-02-05 16:01:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:43,411 INFO L225 Difference]: With dead ends: 86 [2025-02-05 16:01:43,412 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 16:01:43,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 16:01:43,412 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:43,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 102 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:01:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 16:01:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2025-02-05 16:01:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 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 16:01:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2025-02-05 16:01:43,419 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 14 [2025-02-05 16:01:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:43,419 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2025-02-05 16:01:43,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-02-05 16:01:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2025-02-05 16:01:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:01:43,420 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:43,422 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:43,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 16:01:43,423 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:43,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -61201908, now seen corresponding path program 1 times [2025-02-05 16:01:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:43,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345797689] [2025-02-05 16:01:43,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:43,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:01:43,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:01:43,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:43,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:43,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345797689] [2025-02-05 16:01:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345797689] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:43,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336403618] [2025-02-05 16:01:43,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:43,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:43,517 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 16:01:43,517 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 16:01:43,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:01:43,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:01:43,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:43,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:43,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 16:01:43,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:43,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336403618] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:43,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:43,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 16:01:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511782209] [2025-02-05 16:01:43,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:43,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:01:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:43,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:01:43,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:43,656 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:01:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:43,723 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2025-02-05 16:01:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 16:01:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2025-02-05 16:01:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:43,724 INFO L225 Difference]: With dead ends: 94 [2025-02-05 16:01:43,724 INFO L226 Difference]: Without dead ends: 53 [2025-02-05 16:01:43,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:01:43,725 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:43,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 293 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-05 16:01:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-02-05 16:01:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 16:01:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2025-02-05 16:01:43,730 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 21 [2025-02-05 16:01:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:43,731 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2025-02-05 16:01:43,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:01:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2025-02-05 16:01:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 16:01:43,732 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:43,732 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:43,739 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 16:01:43,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:43,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:43,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1305020333, now seen corresponding path program 2 times [2025-02-05 16:01:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:43,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375760762] [2025-02-05 16:01:43,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:43,955 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-05 16:01:43,967 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 16:01:43,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:43,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-05 16:01:44,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375760762] [2025-02-05 16:01:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375760762] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409633286] [2025-02-05 16:01:44,279 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:01:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:44,281 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 16:01:44,283 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 16:01:44,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-05 16:01:44,366 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 16:01:44,366 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:01:44,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:44,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 16:01:44,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:44,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:44,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409633286] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:44,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-05 16:01:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927447148] [2025-02-05 16:01:44,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:44,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 16:01:44,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:44,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 16:01:44,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-05 16:01:44,502 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 16:01:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:44,718 INFO L93 Difference]: Finished difference Result 111 states and 153 transitions. [2025-02-05 16:01:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 16:01:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 42 [2025-02-05 16:01:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:44,724 INFO L225 Difference]: With dead ends: 111 [2025-02-05 16:01:44,724 INFO L226 Difference]: Without dead ends: 61 [2025-02-05 16:01:44,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2025-02-05 16:01:44,725 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:44,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 131 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-05 16:01:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-02-05 16:01:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2025-02-05 16:01:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2025-02-05 16:01:44,731 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 42 [2025-02-05 16:01:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:44,731 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2025-02-05 16:01:44,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 16:01:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2025-02-05 16:01:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-02-05 16:01:44,733 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:44,733 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:44,740 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 16:01:44,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:44,934 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:44,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1553464477, now seen corresponding path program 1 times [2025-02-05 16:01:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406513461] [2025-02-05 16:01:44,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:44,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-02-05 16:01:44,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-02-05 16:01:44,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:44,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2025-02-05 16:01:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406513461] [2025-02-05 16:01:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406513461] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118232113] [2025-02-05 16:01:45,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:45,369 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 16:01:45,378 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 16:01:45,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-02-05 16:01:45,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-02-05 16:01:45,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:45,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:45,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 16:01:45,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-02-05 16:01:45,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-02-05 16:01:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118232113] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:45,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2025-02-05 16:01:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907231201] [2025-02-05 16:01:45,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:45,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 16:01:45,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:45,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 16:01:45,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-05 16:01:45,822 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 16:01:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:45,968 INFO L93 Difference]: Finished difference Result 181 states and 267 transitions. [2025-02-05 16:01:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:01:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 122 [2025-02-05 16:01:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:45,970 INFO L225 Difference]: With dead ends: 181 [2025-02-05 16:01:45,970 INFO L226 Difference]: Without dead ends: 123 [2025-02-05 16:01:45,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:01:45,971 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:45,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 186 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-02-05 16:01:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2025-02-05 16:01:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 89 states have internal predecessors, (98), 31 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2025-02-05 16:01:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2025-02-05 16:01:45,982 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 122 [2025-02-05 16:01:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:45,982 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2025-02-05 16:01:45,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 16:01:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2025-02-05 16:01:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2025-02-05 16:01:45,990 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:45,991 INFO L218 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:45,997 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 [2025-02-05 16:01:46,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:46,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:46,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1984913063, now seen corresponding path program 1 times [2025-02-05 16:01:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:46,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721963874] [2025-02-05 16:01:46,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:46,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 716 statements into 1 equivalence classes. [2025-02-05 16:01:46,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 716 of 716 statements. [2025-02-05 16:01:46,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:46,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12724 backedges. 58 proven. 391 refuted. 0 times theorem prover too weak. 12275 trivial. 0 not checked. [2025-02-05 16:01:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721963874] [2025-02-05 16:01:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721963874] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771583715] [2025-02-05 16:01:47,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:47,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:47,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:47,874 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 16:01:47,885 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 16:01:48,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 716 statements into 1 equivalence classes. [2025-02-05 16:01:48,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 716 of 716 statements. [2025-02-05 16:01:48,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:48,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:48,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 5114 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 16:01:48,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12724 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 11988 trivial. 0 not checked. [2025-02-05 16:01:48,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12724 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 11988 trivial. 0 not checked. [2025-02-05 16:01:49,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771583715] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:49,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-05 16:01:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340264419] [2025-02-05 16:01:49,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:49,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 16:01:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:49,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 16:01:49,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-05 16:01:49,675 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 16:01:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:49,815 INFO L93 Difference]: Finished difference Result 283 states and 416 transitions. [2025-02-05 16:01:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 16:01:49,816 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 716 [2025-02-05 16:01:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:49,817 INFO L225 Difference]: With dead ends: 283 [2025-02-05 16:01:49,820 INFO L226 Difference]: Without dead ends: 165 [2025-02-05 16:01:49,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1437 GetRequests, 1422 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-02-05 16:01:49,821 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:49,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 195 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-02-05 16:01:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2025-02-05 16:01:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 114 states have (on average 1.131578947368421) internal successors, (129), 118 states have internal predecessors, (129), 43 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2025-02-05 16:01:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2025-02-05 16:01:49,845 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 716 [2025-02-05 16:01:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:49,846 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2025-02-05 16:01:49,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 16:01:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2025-02-05 16:01:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1465 [2025-02-05 16:01:49,879 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:49,880 INFO L218 NwaCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:49,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 16:01:50,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 16:01:50,086 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:50,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1298341951, now seen corresponding path program 1 times [2025-02-05 16:01:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:50,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106269401] [2025-02-05 16:01:50,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:50,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1464 statements into 1 equivalence classes. [2025-02-05 16:01:50,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1464 of 1464 statements. [2025-02-05 16:01:50,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:50,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41004 backedges. 88 proven. 805 refuted. 0 times theorem prover too weak. 40111 trivial. 0 not checked. [2025-02-05 16:01:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106269401] [2025-02-05 16:01:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106269401] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699541657] [2025-02-05 16:01:52,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:52,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:52,782 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 16:01:52,784 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 16:01:53,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1464 statements into 1 equivalence classes. [2025-02-05 16:01:54,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1464 of 1464 statements. [2025-02-05 16:01:54,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:54,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:54,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 9350 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 16:01:54,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:54,154 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 16:01:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41004 backedges. 2217 proven. 3 refuted. 0 times theorem prover too weak. 38784 trivial. 0 not checked. [2025-02-05 16:01:54,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 41004 backedges. 82 proven. 669 refuted. 0 times theorem prover too weak. 40253 trivial. 0 not checked. [2025-02-05 16:01:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699541657] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:56,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:56,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 21 [2025-02-05 16:01:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432171535] [2025-02-05 16:01:56,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:56,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 16:01:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:56,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 16:01:56,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2025-02-05 16:01:56,127 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 21 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) [2025-02-05 16:01:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:56,461 INFO L93 Difference]: Finished difference Result 329 states and 512 transitions. [2025-02-05 16:01:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 16:01:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) Word has length 1464 [2025-02-05 16:01:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:56,463 INFO L225 Difference]: With dead ends: 329 [2025-02-05 16:01:56,463 INFO L226 Difference]: Without dead ends: 169 [2025-02-05 16:01:56,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2941 GetRequests, 2914 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2025-02-05 16:01:56,464 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:56,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 252 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:01:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-02-05 16:01:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2025-02-05 16:01:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 120 states have internal predecessors, (131), 43 states have call successors, (43), 4 states have call predecessors, (43), 9 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2025-02-05 16:01:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 222 transitions. [2025-02-05 16:01:56,478 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 222 transitions. Word has length 1464 [2025-02-05 16:01:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:56,478 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 222 transitions. [2025-02-05 16:01:56,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) [2025-02-05 16:01:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 222 transitions. [2025-02-05 16:01:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3013 [2025-02-05 16:01:56,518 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:56,519 INFO L218 NwaCegarLoop]: trace histogram [144, 144, 144, 144, 144, 144, 108, 108, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:56,539 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 16:01:56,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:56,720 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:56,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -834925793, now seen corresponding path program 1 times [2025-02-05 16:01:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155386122] [2025-02-05 16:01:56,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:56,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3012 statements into 1 equivalence classes. [2025-02-05 16:01:56,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3012 of 3012 statements. [2025-02-05 16:01:56,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:56,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 174366 backedges. 116 proven. 2383 refuted. 0 times theorem prover too weak. 171867 trivial. 0 not checked. [2025-02-05 16:02:10,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155386122] [2025-02-05 16:02:10,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155386122] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850763535] [2025-02-05 16:02:10,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:10,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:10,987 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 16:02:10,991 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 16:02:11,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3012 statements into 1 equivalence classes. [2025-02-05 16:02:13,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3012 of 3012 statements. [2025-02-05 16:02:13,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:13,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:13,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 18062 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 16:02:13,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:13,722 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 16:02:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 174366 backedges. 85738 proven. 3 refuted. 0 times theorem prover too weak. 88625 trivial. 0 not checked. [2025-02-05 16:02:13,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 174366 backedges. 2368 proven. 900 refuted. 0 times theorem prover too weak. 171098 trivial. 0 not checked. [2025-02-05 16:02:17,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850763535] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:17,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:02:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2025-02-05 16:02:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608624538] [2025-02-05 16:02:17,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:17,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 16:02:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:17,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 16:02:17,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-05 16:02:17,950 INFO L87 Difference]: Start difference. First operand 169 states and 222 transitions. Second operand has 22 states, 16 states have (on average 5.0625) internal successors, (81), 19 states have internal predecessors, (81), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (31), 8 states have call predecessors, (31), 11 states have call successors, (31) [2025-02-05 16:02:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:18,128 INFO L93 Difference]: Finished difference Result 337 states and 484 transitions. [2025-02-05 16:02:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:02:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 5.0625) internal successors, (81), 19 states have internal predecessors, (81), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (31), 8 states have call predecessors, (31), 11 states have call successors, (31) Word has length 3012 [2025-02-05 16:02:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:18,130 INFO L225 Difference]: With dead ends: 337 [2025-02-05 16:02:18,130 INFO L226 Difference]: Without dead ends: 173 [2025-02-05 16:02:18,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6037 GetRequests, 6012 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2025-02-05 16:02:18,131 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:18,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 371 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:02:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2025-02-05 16:02:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2025-02-05 16:02:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 122 states have internal predecessors, (133), 43 states have call successors, (43), 4 states have call predecessors, (43), 11 states have return successors, (50), 46 states have call predecessors, (50), 43 states have call successors, (50) [2025-02-05 16:02:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 226 transitions. [2025-02-05 16:02:18,151 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 226 transitions. Word has length 3012 [2025-02-05 16:02:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:18,151 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 226 transitions. [2025-02-05 16:02:18,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 5.0625) internal successors, (81), 19 states have internal predecessors, (81), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (31), 8 states have call predecessors, (31), 11 states have call successors, (31) [2025-02-05 16:02:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 226 transitions. [2025-02-05 16:02:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5317 [2025-02-05 16:02:18,372 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:18,373 INFO L218 NwaCegarLoop]: trace histogram [432, 432, 288, 288, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 144, 144, 108, 108, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:18,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:18,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 16:02:18,575 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:18,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1584721951, now seen corresponding path program 2 times [2025-02-05 16:02:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:18,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300057704] [2025-02-05 16:02:18,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:18,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 5316 statements into 2 equivalence classes. [2025-02-05 16:02:18,931 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 5316 of 5316 statements. [2025-02-05 16:02:18,931 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:02:18,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 712350 backedges. 271 proven. 1907 refuted. 0 times theorem prover too weak. 710172 trivial. 0 not checked. [2025-02-05 16:02:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300057704] [2025-02-05 16:02:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300057704] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353492798] [2025-02-05 16:02:57,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:57,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:57,475 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 16:02:57,475 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 16:02:58,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 5316 statements into 2 equivalence classes. [2025-02-05 16:03:01,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 5316 of 5316 statements. [2025-02-05 16:03:01,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:03:01,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:01,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 27710 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 16:03:01,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:01,618 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 16:03:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 712350 backedges. 286764 proven. 3 refuted. 0 times theorem prover too weak. 425583 trivial. 0 not checked. [2025-02-05 16:03:01,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:03:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 712350 backedges. 1384 proven. 1460 refuted. 0 times theorem prover too weak. 709506 trivial. 0 not checked. [2025-02-05 16:03:10,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353492798] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:03:10,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:03:10,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2025-02-05 16:03:10,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758661644] [2025-02-05 16:03:10,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:03:10,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 16:03:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:10,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 16:03:10,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-02-05 16:03:10,532 INFO L87 Difference]: Start difference. First operand 173 states and 226 transitions. Second operand has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (29), 8 states have call predecessors, (29), 10 states have call successors, (29) [2025-02-05 16:03:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:10,754 INFO L93 Difference]: Finished difference Result 345 states and 490 transitions. [2025-02-05 16:03:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:03:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (29), 8 states have call predecessors, (29), 10 states have call successors, (29) Word has length 5316 [2025-02-05 16:03:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:10,756 INFO L225 Difference]: With dead ends: 345 [2025-02-05 16:03:10,756 INFO L226 Difference]: Without dead ends: 177 [2025-02-05 16:03:10,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10645 GetRequests, 10621 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2025-02-05 16:03:10,763 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 43 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:03:10,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 239 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:03:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-02-05 16:03:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2025-02-05 16:03:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.125) internal successors, (135), 124 states have internal predecessors, (135), 43 states have call successors, (43), 4 states have call predecessors, (43), 13 states have return successors, (52), 48 states have call predecessors, (52), 43 states have call successors, (52) [2025-02-05 16:03:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 230 transitions. [2025-02-05 16:03:10,796 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 230 transitions. Word has length 5316 [2025-02-05 16:03:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:10,801 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 230 transitions. [2025-02-05 16:03:10,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (29), 8 states have call predecessors, (29), 10 states have call successors, (29) [2025-02-05 16:03:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 230 transitions. [2025-02-05 16:03:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13813 [2025-02-05 16:03:11,646 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:11,649 INFO L218 NwaCegarLoop]: trace histogram [1296, 1296, 864, 864, 648, 648, 648, 648, 648, 648, 648, 648, 648, 648, 288, 288, 216, 216, 216, 216, 216, 216, 216, 108, 108, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:03:11,709 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 16:03:11,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:11,849 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:11,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1819894497, now seen corresponding path program 3 times [2025-02-05 16:03:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:11,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104086098] [2025-02-05 16:03:11,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:03:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:12,734 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13812 statements into 552 equivalence classes. [2025-02-05 16:03:12,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 72 of 13812 statements. [2025-02-05 16:03:12,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:03:12,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5954310 backedges. 1801 proven. 8 refuted. 0 times theorem prover too weak. 5952501 trivial. 0 not checked. [2025-02-05 16:03:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104086098] [2025-02-05 16:03:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104086098] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:03:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353753998] [2025-02-05 16:03:13,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:03:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:13,328 INFO L229 MonitoredProcess]: Starting monitored process 9 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 16:03:13,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 16:03:16,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13812 statements into 552 equivalence classes. [2025-02-05 16:03:16,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 72 of 13812 statements. [2025-02-05 16:03:16,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:03:16,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:16,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 16:03:16,463 INFO L279 TraceCheckSpWp]: Computing forward predicates...