./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c24.i --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/loops/n.c24.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:44:38,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:44:38,613 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:44:38,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:44:38,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:44:38,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:44:38,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:44:38,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:44:38,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:44:38,646 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:44:38,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:44:38,646 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:44:38,647 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:44:38,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:44:38,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:44:38,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:44:38,649 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 -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2025-02-05 14:44:38,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:44:38,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:44:38,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:44:38,862 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:44:38,863 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:44:38,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2025-02-05 14:44:39,984 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76db55cae/31ebedba32f3489993119d15c8d0e2c2/FLAGc80d2c473 [2025-02-05 14:44:40,206 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:44:40,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2025-02-05 14:44:40,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76db55cae/31ebedba32f3489993119d15c8d0e2c2/FLAGc80d2c473 [2025-02-05 14:44:40,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76db55cae/31ebedba32f3489993119d15c8d0e2c2 [2025-02-05 14:44:40,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:44:40,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:44:40,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:44:40,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:44:40,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:44:40,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c621b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40, skipping insertion in model container [2025-02-05 14:44:40,562 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,576 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:44:40,683 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/loops/n.c24.i[805,818] [2025-02-05 14:44:40,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:44:40,740 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:44:40,752 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/loops/n.c24.i[805,818] [2025-02-05 14:44:40,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:44:40,787 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:44:40,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40 WrapperNode [2025-02-05 14:44:40,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:44:40,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:44:40,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:44:40,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:44:40,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,800 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,819 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2025-02-05 14:44:40,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:44:40,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:44:40,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:44:40,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:44:40,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,844 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 9, 2]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2025-02-05 14:44:40,844 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,849 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,851 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:44:40,853 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:44:40,853 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:44:40,853 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:44:40,853 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (1/1) ... [2025-02-05 14:44:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:44:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:40,878 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 14:44:40,880 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 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 14:44:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2025-02-05 14:44:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:44:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:44:40,959 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:44:40,960 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:44:41,155 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L147: havoc foo_#t~mem3#1; [2025-02-05 14:44:41,155 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L143: havoc bar_#t~nondet1#1; [2025-02-05 14:44:41,155 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L150: call ULTIMATE.dealloc(main_~#tel_data~0#1.base, main_~#tel_data~0#1.offset);havoc main_~#tel_data~0#1.base, main_~#tel_data~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-02-05 14:44:41,171 INFO L? ?]: Removed 37 outVars from TransFormulas that were not future-live. [2025-02-05 14:44:41,172 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:44:41,179 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:44:41,180 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:44:41,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:44:41 BoogieIcfgContainer [2025-02-05 14:44:41,180 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:44:41,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:44:41,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:44:41,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:44:41,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:44:40" (1/3) ... [2025-02-05 14:44:41,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10403508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:44:41, skipping insertion in model container [2025-02-05 14:44:41,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:44:40" (2/3) ... [2025-02-05 14:44:41,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10403508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:44:41, skipping insertion in model container [2025-02-05 14:44:41,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:44:41" (3/3) ... [2025-02-05 14:44:41,189 INFO L128 eAbstractionObserver]: Analyzing ICFG n.c24.i [2025-02-05 14:44:41,199 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:44:41,200 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG n.c24.i that has 1 procedures, 32 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-02-05 14:44:41,242 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:44:41,249 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;@10915bba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:44:41,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:44:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 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 14:44:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-05 14:44:41,257 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:41,257 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-05 14:44:41,257 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:41,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1485607542, now seen corresponding path program 1 times [2025-02-05 14:44:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:41,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934012272] [2025-02-05 14:44:41,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:44:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:41,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-05 14:44:41,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-05 14:44:41,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:44:41,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:41,415 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 14:44:41,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:41,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934012272] [2025-02-05 14:44:41,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934012272] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:44:41,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:44:41,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:44:41,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044936715] [2025-02-05 14:44:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:44:41,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:44:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:41,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:44:41,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:44:41,438 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 14:44:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:41,484 INFO L93 Difference]: Finished difference Result 85 states and 129 transitions. [2025-02-05 14:44:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:44:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2025-02-05 14:44:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:41,491 INFO L225 Difference]: With dead ends: 85 [2025-02-05 14:44:41,491 INFO L226 Difference]: Without dead ends: 51 [2025-02-05 14:44:41,493 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 14:44:41,496 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:41,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:44:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-05 14:44:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2025-02-05 14:44:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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 14:44:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2025-02-05 14:44:41,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 6 [2025-02-05 14:44:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:41,520 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2025-02-05 14:44:41,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 14:44:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2025-02-05 14:44:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 14:44:41,521 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:41,521 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:41,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:44:41,521 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:41,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1448226601, now seen corresponding path program 1 times [2025-02-05 14:44:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274935796] [2025-02-05 14:44:41,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:44:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:41,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 14:44:41,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:44:41,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:44:41,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:44:41,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:41,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274935796] [2025-02-05 14:44:41,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274935796] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:41,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689811065] [2025-02-05 14:44:41,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:44:41,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:41,615 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 14:44:41,616 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 14:44:41,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 14:44:41,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:44:41,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:44:41,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:41,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 14:44:41,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:44:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:44:41,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:44:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:44:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689811065] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:44:41,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:44:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 14:44:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598036298] [2025-02-05 14:44:41,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:44:41,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:44:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:41,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:44:41,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:44:41,755 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14:44:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:41,842 INFO L93 Difference]: Finished difference Result 125 states and 177 transitions. [2025-02-05 14:44:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:44:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14:44:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:41,843 INFO L225 Difference]: With dead ends: 125 [2025-02-05 14:44:41,843 INFO L226 Difference]: Without dead ends: 99 [2025-02-05 14:44:41,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 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 14:44:41,843 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 120 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:41,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 143 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:44:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-02-05 14:44:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-02-05 14:44:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 98 states have internal predecessors, (136), 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 14:44:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2025-02-05 14:44:41,850 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 12 [2025-02-05 14:44:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:41,850 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2025-02-05 14:44:41,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14:44:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2025-02-05 14:44:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 14:44:41,851 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:41,851 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:41,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 14:44:42,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:42,052 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:42,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1691606090, now seen corresponding path program 2 times [2025-02-05 14:44:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:42,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052139373] [2025-02-05 14:44:42,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:44:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:42,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-05 14:44:42,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 14:44:42,080 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:44:42,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 14:44:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052139373] [2025-02-05 14:44:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052139373] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:44:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:44:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:44:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764129252] [2025-02-05 14:44:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:44:42,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:44:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:42,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:44:42,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:44:42,203 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 14:44:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:42,234 INFO L93 Difference]: Finished difference Result 188 states and 261 transitions. [2025-02-05 14:44:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:44:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-05 14:44:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:42,235 INFO L225 Difference]: With dead ends: 188 [2025-02-05 14:44:42,235 INFO L226 Difference]: Without dead ends: 185 [2025-02-05 14:44:42,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:44:42,236 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:42,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:44:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-02-05 14:44:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 100. [2025-02-05 14:44:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.393939393939394) internal successors, (138), 99 states have internal predecessors, (138), 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 14:44:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2025-02-05 14:44:42,249 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 30 [2025-02-05 14:44:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:42,249 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2025-02-05 14:44:42,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 14:44:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2025-02-05 14:44:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 14:44:42,252 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:42,252 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:42,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 14:44:42,252 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:42,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -278713850, now seen corresponding path program 1 times [2025-02-05 14:44:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244784096] [2025-02-05 14:44:42,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:44:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:42,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 14:44:42,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 14:44:42,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:44:42,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-02-05 14:44:42,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244784096] [2025-02-05 14:44:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244784096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784809428] [2025-02-05 14:44:42,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:44:42,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:42,377 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 14:44:42,379 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 14:44:42,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 14:44:42,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 14:44:42,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:44:42,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:42,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 14:44:42,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:44:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-02-05 14:44:42,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:44:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-02-05 14:44:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784809428] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:44:42,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:44:42,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-05 14:44:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410342983] [2025-02-05 14:44:42,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:44:42,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:44:42,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:42,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:44:42,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:44:42,572 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 14:44:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:42,683 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2025-02-05 14:44:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 14:44:42,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 35 [2025-02-05 14:44:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:42,685 INFO L225 Difference]: With dead ends: 351 [2025-02-05 14:44:42,685 INFO L226 Difference]: Without dead ends: 258 [2025-02-05 14:44:42,685 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:44:42,686 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 540 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:42,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 271 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:44:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-02-05 14:44:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 238. [2025-02-05 14:44:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.3924050632911393) internal successors, (330), 237 states have internal predecessors, (330), 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 14:44:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 330 transitions. [2025-02-05 14:44:42,707 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 330 transitions. Word has length 35 [2025-02-05 14:44:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:42,708 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 330 transitions. [2025-02-05 14:44:42,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 14:44:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 330 transitions. [2025-02-05 14:44:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-05 14:44:42,709 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:42,710 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:42,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 14:44:42,911 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 14:44:42,911 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:42,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2075939814, now seen corresponding path program 2 times [2025-02-05 14:44:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:42,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740023880] [2025-02-05 14:44:42,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:44:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:42,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-05 14:44:42,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 14:44:42,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:44:42,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2025-02-05 14:44:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740023880] [2025-02-05 14:44:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740023880] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122127697] [2025-02-05 14:44:43,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:44:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:43,187 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 14:44:43,189 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 14:44:43,248 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-05 14:44:43,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 14:44:43,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:44:43,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:43,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:44:43,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:44:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2025-02-05 14:44:43,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:44:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2025-02-05 14:44:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122127697] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:44:43,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:44:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-05 14:44:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86321855] [2025-02-05 14:44:43,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:44:43,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 14:44:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:43,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 14:44:43,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:44:43,498 INFO L87 Difference]: Start difference. First operand 238 states and 330 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 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 14:44:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:43,757 INFO L93 Difference]: Finished difference Result 777 states and 1104 transitions. [2025-02-05 14:44:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 14:44:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 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 71 [2025-02-05 14:44:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:43,759 INFO L225 Difference]: With dead ends: 777 [2025-02-05 14:44:43,759 INFO L226 Difference]: Without dead ends: 552 [2025-02-05 14:44:43,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:44:43,760 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 1710 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:43,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 565 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:44:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2025-02-05 14:44:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 514. [2025-02-05 14:44:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.391812865497076) internal successors, (714), 513 states have internal predecessors, (714), 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 14:44:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 714 transitions. [2025-02-05 14:44:43,795 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 714 transitions. Word has length 71 [2025-02-05 14:44:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:43,795 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 714 transitions. [2025-02-05 14:44:43,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 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 14:44:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 714 transitions. [2025-02-05 14:44:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-02-05 14:44:43,798 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:43,799 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:43,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 14:44:43,999 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 14:44:43,999 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:44,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash 349503398, now seen corresponding path program 3 times [2025-02-05 14:44:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:44,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259168034] [2025-02-05 14:44:44,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:44:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:44,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 23 equivalence classes. [2025-02-05 14:44:44,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 143 statements. [2025-02-05 14:44:44,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:44:44,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2025-02-05 14:44:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259168034] [2025-02-05 14:44:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259168034] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524763353] [2025-02-05 14:44:44,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:44:44,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:44,125 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 14:44:44,127 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 14:44:44,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 23 equivalence classes. [2025-02-05 14:44:44,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 143 statements. [2025-02-05 14:44:44,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:44:44,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:44,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 14:44:44,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:44:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2025-02-05 14:44:44,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:44:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2025-02-05 14:44:44,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524763353] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:44:44,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:44:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2025-02-05 14:44:44,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001350071] [2025-02-05 14:44:44,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:44:44,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:44:44,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:44,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:44:44,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:44:44,386 INFO L87 Difference]: Start difference. First operand 514 states and 714 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:44:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:44,511 INFO L93 Difference]: Finished difference Result 1982 states and 2798 transitions. [2025-02-05 14:44:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:44:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2025-02-05 14:44:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:44,518 INFO L225 Difference]: With dead ends: 1982 [2025-02-05 14:44:44,518 INFO L226 Difference]: Without dead ends: 1979 [2025-02-05 14:44:44,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:44:44,519 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 215 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:44,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 405 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:44:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2025-02-05 14:44:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 568. [2025-02-05 14:44:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.402116402116402) internal successors, (795), 567 states have internal predecessors, (795), 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 14:44:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 795 transitions. [2025-02-05 14:44:44,570 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 795 transitions. Word has length 143 [2025-02-05 14:44:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:44,570 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 795 transitions. [2025-02-05 14:44:44,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:44:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 795 transitions. [2025-02-05 14:44:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-02-05 14:44:44,573 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:44,573 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:44,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 14:44:44,774 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 14:44:44,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:44,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2125357654, now seen corresponding path program 4 times [2025-02-05 14:44:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112832853] [2025-02-05 14:44:44,774 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:44:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:44,804 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 158 statements into 2 equivalence classes. [2025-02-05 14:44:44,830 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-02-05 14:44:44,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:44:44,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 148 proven. 34 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2025-02-05 14:44:45,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112832853] [2025-02-05 14:44:45,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112832853] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833253570] [2025-02-05 14:44:45,158 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:44:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:45,161 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 14:44:45,163 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 14:44:45,238 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 158 statements into 2 equivalence classes. [2025-02-05 14:44:45,304 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-02-05 14:44:45,304 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:44:45,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:45,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 14:44:45,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:44:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1261 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-02-05 14:44:45,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:44:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1261 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-02-05 14:44:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833253570] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:44:46,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:44:46,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2025-02-05 14:44:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729068344] [2025-02-05 14:44:46,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:44:46,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-02-05 14:44:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:44:46,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-02-05 14:44:46,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1722, Unknown=0, NotChecked=0, Total=2862 [2025-02-05 14:44:46,490 INFO L87 Difference]: Start difference. First operand 568 states and 795 transitions. Second operand has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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 14:44:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:44:56,804 INFO L93 Difference]: Finished difference Result 6659 states and 9443 transitions. [2025-02-05 14:44:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2025-02-05 14:44:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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 158 [2025-02-05 14:44:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:44:56,820 INFO L225 Difference]: With dead ends: 6659 [2025-02-05 14:44:56,820 INFO L226 Difference]: Without dead ends: 6115 [2025-02-05 14:44:56,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27490 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12410, Invalid=67962, Unknown=0, NotChecked=0, Total=80372 [2025-02-05 14:44:56,841 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 30011 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30011 SdHoareTripleChecker+Valid, 5634 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-05 14:44:56,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30011 Valid, 5634 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-05 14:44:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2025-02-05 14:44:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 1138. [2025-02-05 14:44:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 1.3984168865435356) internal successors, (1590), 1137 states have internal predecessors, (1590), 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 14:44:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1590 transitions. [2025-02-05 14:44:56,905 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1590 transitions. Word has length 158 [2025-02-05 14:44:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:44:56,905 INFO L471 AbstractCegarLoop]: Abstraction has 1138 states and 1590 transitions. [2025-02-05 14:44:56,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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 14:44:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1590 transitions. [2025-02-05 14:44:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2025-02-05 14:44:56,909 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:44:56,910 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-05 14:44:56,920 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 14:44:57,114 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 14:44:57,114 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:44:57,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:44:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash 763575334, now seen corresponding path program 5 times [2025-02-05 14:44:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:44:57,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556851296] [2025-02-05 14:44:57,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:44:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:44:57,142 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 307 statements into 47 equivalence classes. [2025-02-05 14:44:57,482 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 307 of 307 statements. [2025-02-05 14:44:57,482 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-02-05 14:44:57,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:44:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6582 backedges. 0 proven. 5446 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2025-02-05 14:44:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:44:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556851296] [2025-02-05 14:44:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556851296] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:44:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515851465] [2025-02-05 14:44:59,755 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:44:59,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:44:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:44:59,757 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 14:44:59,758 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 14:44:59,859 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 307 statements into 47 equivalence classes. [2025-02-05 14:45:32,954 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 307 of 307 statements. [2025-02-05 14:45:32,955 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-02-05 14:45:32,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:45:32,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-05 14:45:32,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:45:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6582 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5501 trivial. 0 not checked. [2025-02-05 14:45:33,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:45:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6582 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5501 trivial. 0 not checked. [2025-02-05 14:45:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515851465] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:45:34,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:45:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2025-02-05 14:45:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305359743] [2025-02-05 14:45:34,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:45:34,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-02-05 14:45:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:45:34,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-02-05 14:45:34,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-02-05 14:45:34,806 INFO L87 Difference]: Start difference. First operand 1138 states and 1590 transitions. Second operand has 96 states, 96 states have (on average 3.6354166666666665) internal successors, (349), 96 states have internal predecessors, (349), 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 14:45:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:45:42,653 INFO L93 Difference]: Finished difference Result 6933 states and 10140 transitions. [2025-02-05 14:45:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-02-05 14:45:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.6354166666666665) internal successors, (349), 96 states have internal predecessors, (349), 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 307 [2025-02-05 14:45:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:45:42,670 INFO L225 Difference]: With dead ends: 6933 [2025-02-05 14:45:42,671 INFO L226 Difference]: Without dead ends: 5844 [2025-02-05 14:45:42,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-02-05 14:45:42,674 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 10929 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10929 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:45:42,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10929 Valid, 2377 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:45:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2025-02-05 14:45:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 2242. [2025-02-05 14:45:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 1.394912985274431) internal successors, (3126), 2241 states have internal predecessors, (3126), 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 14:45:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3126 transitions. [2025-02-05 14:45:42,790 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3126 transitions. Word has length 307 [2025-02-05 14:45:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:45:42,790 INFO L471 AbstractCegarLoop]: Abstraction has 2242 states and 3126 transitions. [2025-02-05 14:45:42,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.6354166666666665) internal successors, (349), 96 states have internal predecessors, (349), 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 14:45:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3126 transitions. [2025-02-05 14:45:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2025-02-05 14:45:42,798 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:45:42,798 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-05 14:45:42,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:45:42,999 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 14:45:42,999 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:45:42,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:45:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1879004378, now seen corresponding path program 6 times [2025-02-05 14:45:42,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:45:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726016132] [2025-02-05 14:45:43,000 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:45:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:45:43,063 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 595 statements into 95 equivalence classes. [2025-02-05 14:45:43,090 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 103 of 595 statements. [2025-02-05 14:45:43,090 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 14:45:43,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:45:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26934 backedges. 745 proven. 55 refuted. 0 times theorem prover too weak. 26134 trivial. 0 not checked. [2025-02-05 14:45:43,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:45:43,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726016132] [2025-02-05 14:45:43,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726016132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:45:43,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107982346] [2025-02-05 14:45:43,225 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:45:43,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:45:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:45:43,227 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 14:45:43,228 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 14:45:43,390 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 595 statements into 95 equivalence classes. [2025-02-05 14:45:43,524 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 103 of 595 statements. [2025-02-05 14:45:43,524 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 14:45:43,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:45:43,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:45:43,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:45:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 26934 backedges. 745 proven. 55 refuted. 0 times theorem prover too weak. 26134 trivial. 0 not checked. [2025-02-05 14:45:43,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:45:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26934 backedges. 745 proven. 55 refuted. 0 times theorem prover too weak. 26134 trivial. 0 not checked. [2025-02-05 14:45:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107982346] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:45:43,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:45:43,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2025-02-05 14:45:43,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14708686] [2025-02-05 14:45:43,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:45:43,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 14:45:43,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:45:43,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 14:45:43,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2025-02-05 14:45:43,969 INFO L87 Difference]: Start difference. First operand 2242 states and 3126 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 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 14:45:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:45:44,997 INFO L93 Difference]: Finished difference Result 23486 states and 33734 transitions. [2025-02-05 14:45:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 14:45:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 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 595 [2025-02-05 14:45:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:45:45,054 INFO L225 Difference]: With dead ends: 23486 [2025-02-05 14:45:45,054 INFO L226 Difference]: Without dead ends: 23483 [2025-02-05 14:45:45,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:45:45,062 INFO L435 NwaCegarLoop]: 177 mSDtfsCounter, 941 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:45:45,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1865 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:45:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23483 states. [2025-02-05 14:45:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23483 to 2368. [2025-02-05 14:45:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 1.4005069708491762) internal successors, (3315), 2367 states have internal predecessors, (3315), 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 14:45:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3315 transitions. [2025-02-05 14:45:45,366 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3315 transitions. Word has length 595 [2025-02-05 14:45:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:45:45,368 INFO L471 AbstractCegarLoop]: Abstraction has 2368 states and 3315 transitions. [2025-02-05 14:45:45,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 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 14:45:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3315 transitions. [2025-02-05 14:45:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2025-02-05 14:45:45,378 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:45:45,378 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2025-02-05 14:45:45,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:45:45,583 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 14:45:45,583 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:45:45,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:45:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2076532010, now seen corresponding path program 7 times [2025-02-05 14:45:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:45:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163612387] [2025-02-05 14:45:45,583 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:45:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:45:45,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 630 statements into 1 equivalence classes. [2025-02-05 14:45:45,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 630 of 630 statements. [2025-02-05 14:45:45,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:45:45,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:45:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27872 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23407 trivial. 0 not checked. [2025-02-05 14:45:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:45:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163612387] [2025-02-05 14:45:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163612387] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:45:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371448153] [2025-02-05 14:45:51,634 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:45:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:45:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:45:51,636 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 14:45:51,638 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 14:45:51,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 630 statements into 1 equivalence classes. [2025-02-05 14:45:52,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 630 of 630 statements. [2025-02-05 14:45:52,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:45:52,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:45:52,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-02-05 14:45:52,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:45:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27872 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23407 trivial. 0 not checked. [2025-02-05 14:45:52,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:45:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 27872 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23407 trivial. 0 not checked. [2025-02-05 14:45:59,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371448153] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:45:59,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:45:59,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2025-02-05 14:45:59,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312040161] [2025-02-05 14:45:59,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:45:59,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2025-02-05 14:45:59,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:45:59,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2025-02-05 14:45:59,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2025-02-05 14:45:59,079 INFO L87 Difference]: Start difference. First operand 2368 states and 3315 transitions. Second operand has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 193 states have internal predecessors, (208), 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)