./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_07.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/array-examples/standard_two_index_07.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 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:00:10,134 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:00:10,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:00:10,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:00:10,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:00:10,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:00:10,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:00:10,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:00:10,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:00:10,218 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:00:10,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:00:10,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:00:10,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:00:10,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:00:10,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:00:10,220 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:00:10,221 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:00:10,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:00:10,221 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:00:10,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:00:10,222 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 -> 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee [2025-02-05 10:00:10,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:00:10,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:00:10,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:00:10,505 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:00:10,505 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:00:10,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_07.i [2025-02-05 10:00:11,821 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/be4eb1548/1cbf3681e4504d3ab129453afd95f764/FLAGdc616d2e3 [2025-02-05 10:00:12,073 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:00:12,078 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i [2025-02-05 10:00:12,089 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/be4eb1548/1cbf3681e4504d3ab129453afd95f764/FLAGdc616d2e3 [2025-02-05 10:00:12,380 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/be4eb1548/1cbf3681e4504d3ab129453afd95f764 [2025-02-05 10:00:12,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:00:12,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:00:12,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:00:12,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:00:12,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:00:12,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490b3216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12, skipping insertion in model container [2025-02-05 10:00:12,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,402 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:00:12,518 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2025-02-05 10:00:12,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:00:12,543 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:00:12,552 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2025-02-05 10:00:12,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:00:12,577 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:00:12,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12 WrapperNode [2025-02-05 10:00:12,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:00:12,579 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:00:12,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:00:12,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:00:12,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,605 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2025-02-05 10:00:12,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:00:12,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:00:12,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:00:12,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:00:12,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,628 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-02-05 10:00:12,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,633 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:00:12,643 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:00:12,647 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:00:12,647 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:00:12,648 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (1/1) ... [2025-02-05 10:00:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:00:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:12,680 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 10:00:12,684 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 10:00:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 10:00:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 10:00:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:00:12,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:00:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 10:00:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 10:00:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 10:00:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 10:00:12,777 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:00:12,778 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:00:12,892 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset; [2025-02-05 10:00:12,897 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 10:00:12,897 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:00:12,903 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:00:12,904 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:00:12,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:00:12 BoogieIcfgContainer [2025-02-05 10:00:12,905 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:00:12,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:00:12,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:00:12,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:00:12,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:00:12" (1/3) ... [2025-02-05 10:00:12,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7a38ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:00:12, skipping insertion in model container [2025-02-05 10:00:12,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:00:12" (2/3) ... [2025-02-05 10:00:12,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7a38ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:00:12, skipping insertion in model container [2025-02-05 10:00:12,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:00:12" (3/3) ... [2025-02-05 10:00:12,917 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2025-02-05 10:00:12,930 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:00:12,932 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_two_index_07.i that has 1 procedures, 12 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-05 10:00:12,972 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:00:12,982 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;@2dcac179, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:00:12,982 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:00:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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 10:00:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 10:00:12,989 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:12,990 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:12,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:12,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1712306486, now seen corresponding path program 1 times [2025-02-05 10:00:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154570149] [2025-02-05 10:00:12,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:00:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:13,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 10:00:13,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 10:00:13,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:00:13,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:13,167 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 10:00:13,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:13,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154570149] [2025-02-05 10:00:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154570149] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:00:13,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:00:13,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:00:13,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285860736] [2025-02-05 10:00:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:00:13,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:00:13,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:13,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:00:13,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:00:13,196 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10:00:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:13,237 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2025-02-05 10:00:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:00:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2025-02-05 10:00:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:13,243 INFO L225 Difference]: With dead ends: 22 [2025-02-05 10:00:13,243 INFO L226 Difference]: Without dead ends: 10 [2025-02-05 10:00:13,245 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 10:00:13,247 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:13,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:00:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-05 10:00:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-05 10:00:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-02-05 10:00:13,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2025-02-05 10:00:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:13,268 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-02-05 10:00:13,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10:00:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-02-05 10:00:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 10:00:13,269 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:13,269 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:13,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:00:13,270 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:13,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1511385571, now seen corresponding path program 1 times [2025-02-05 10:00:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071751306] [2025-02-05 10:00:13,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:00:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:13,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 10:00:13,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 10:00:13,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:00:13,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:00:13,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:13,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071751306] [2025-02-05 10:00:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071751306] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:13,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119360573] [2025-02-05 10:00:13,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:00:13,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:13,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:13,392 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 10:00:13,394 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 10:00:13,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 10:00:13,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 10:00:13,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:00:13,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:13,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-05 10:00:13,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:00:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 10:00:13,461 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:00:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119360573] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:00:13,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:00:13,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2025-02-05 10:00:13,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760367888] [2025-02-05 10:00:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:00:13,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:00:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:13,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:00:13,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:00:13,463 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10:00:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:13,480 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2025-02-05 10:00:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:00:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2025-02-05 10:00:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:13,481 INFO L225 Difference]: With dead ends: 21 [2025-02-05 10:00:13,481 INFO L226 Difference]: Without dead ends: 16 [2025-02-05 10:00:13,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:00:13,482 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:13,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:00:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-05 10:00:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2025-02-05 10:00:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 10:00:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-05 10:00:13,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2025-02-05 10:00:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:13,485 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-05 10:00:13,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10:00:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-05 10:00:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 10:00:13,486 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:13,486 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:13,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 10:00:13,686 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 10:00:13,687 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:13,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 392642826, now seen corresponding path program 1 times [2025-02-05 10:00:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:13,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547737534] [2025-02-05 10:00:13,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:00:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:13,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 10:00:13,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 10:00:13,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:00:13,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:13,759 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 10:00:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547737534] [2025-02-05 10:00:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547737534] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467332247] [2025-02-05 10:00:13,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:00:13,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:13,763 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 10:00:13,765 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 10:00:13,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 10:00:13,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 10:00:13,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:00:13,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:13,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 10:00:13,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:00:13,860 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 10:00:13,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:00:13,894 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 10:00:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467332247] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:00:13,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:00:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 10:00:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311354543] [2025-02-05 10:00:13,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:00:13,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 10:00:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:13,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 10:00:13,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:00:13,898 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:13,946 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2025-02-05 10:00:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:00:13,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 10:00:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:13,947 INFO L225 Difference]: With dead ends: 32 [2025-02-05 10:00:13,947 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 10:00:13,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 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 10:00:13,948 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:13,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:00:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 10:00:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2025-02-05 10:00:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 10:00:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-02-05 10:00:13,952 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2025-02-05 10:00:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:13,952 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-02-05 10:00:13,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-02-05 10:00:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 10:00:13,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:13,953 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:13,958 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 10:00:14,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:14,154 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:14,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1699563030, now seen corresponding path program 2 times [2025-02-05 10:00:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022672431] [2025-02-05 10:00:14,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:00:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:14,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-05 10:00:14,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 10:00:14,205 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:00:14,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 10:00:14,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022672431] [2025-02-05 10:00:14,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022672431] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380072823] [2025-02-05 10:00:14,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:00:14,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:14,308 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 10:00:14,311 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 10:00:14,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-05 10:00:14,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 10:00:14,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:00:14,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:14,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 10:00:14,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:00:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:00:14,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:00:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:00:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380072823] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:00:14,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:00:14,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-05 10:00:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571449929] [2025-02-05 10:00:14,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:00:14,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 10:00:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:14,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 10:00:14,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2025-02-05 10:00:14,526 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:14,593 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2025-02-05 10:00:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 10:00:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-02-05 10:00:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:14,595 INFO L225 Difference]: With dead ends: 53 [2025-02-05 10:00:14,595 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 10:00:14,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2025-02-05 10:00:14,596 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:14,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:00:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 10:00:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2025-02-05 10:00:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2025-02-05 10:00:14,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2025-02-05 10:00:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:14,601 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2025-02-05 10:00:14,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:00:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2025-02-05 10:00:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 10:00:14,602 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:14,602 INFO L218 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:14,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 10:00:14,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:14,807 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:14,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1424355786, now seen corresponding path program 3 times [2025-02-05 10:00:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778742252] [2025-02-05 10:00:14,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:00:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:14,830 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-02-05 10:00:14,857 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 23 statements. [2025-02-05 10:00:14,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:00:14,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:00:14,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:14,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778742252] [2025-02-05 10:00:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778742252] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826731126] [2025-02-05 10:00:14,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:00:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:14,961 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 10:00:14,964 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 10:00:15,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-02-05 10:00:15,043 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 23 statements. [2025-02-05 10:00:15,043 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:00:15,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:15,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 10:00:15,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:00:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:00:15,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:00:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:00:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826731126] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:00:15,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:00:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-05 10:00:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231341180] [2025-02-05 10:00:15,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:00:15,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 10:00:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:15,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 10:00:15,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:00:15,135 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 10:00:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:15,238 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2025-02-05 10:00:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 10:00:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 23 [2025-02-05 10:00:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:15,240 INFO L225 Difference]: With dead ends: 82 [2025-02-05 10:00:15,240 INFO L226 Difference]: Without dead ends: 77 [2025-02-05 10:00:15,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 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 10:00:15,241 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:15,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 36 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:00:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-05 10:00:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2025-02-05 10:00:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 10:00:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2025-02-05 10:00:15,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2025-02-05 10:00:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:15,248 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2025-02-05 10:00:15,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 10:00:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2025-02-05 10:00:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 10:00:15,248 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:15,248 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:15,254 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 10:00:15,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:15,449 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:15,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1462559510, now seen corresponding path program 4 times [2025-02-05 10:00:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:15,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125986345] [2025-02-05 10:00:15,450 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:00:15,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:15,469 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-05 10:00:15,488 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 10:00:15,488 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:00:15,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:00:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125986345] [2025-02-05 10:00:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125986345] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042424291] [2025-02-05 10:00:15,743 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:00:15,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:15,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:15,745 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 10:00:15,748 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 10:00:15,803 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-05 10:00:15,838 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 10:00:15,838 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:00:15,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:15,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 10:00:15,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:00:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 10:00:15,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:00:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 10:00:16,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042424291] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:00:16,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:00:16,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2025-02-05 10:00:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391785438] [2025-02-05 10:00:16,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:00:16,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-05 10:00:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:00:16,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-05 10:00:16,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 10:00:16,232 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 10:00:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:00:16,407 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2025-02-05 10:00:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-05 10:00:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 29 [2025-02-05 10:00:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:00:16,409 INFO L225 Difference]: With dead ends: 138 [2025-02-05 10:00:16,409 INFO L226 Difference]: Without dead ends: 122 [2025-02-05 10:00:16,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 10:00:16,412 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 203 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:00:16,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 84 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:00:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-05 10:00:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 57. [2025-02-05 10:00:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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 10:00:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2025-02-05 10:00:16,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 29 [2025-02-05 10:00:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:00:16,426 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2025-02-05 10:00:16,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 10:00:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2025-02-05 10:00:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 10:00:16,427 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:00:16,427 INFO L218 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:00:16,437 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 10:00:16,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:16,633 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:00:16,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:00:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1485801386, now seen corresponding path program 5 times [2025-02-05 10:00:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:00:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836248143] [2025-02-05 10:00:16,634 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:00:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:00:16,662 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 19 equivalence classes. [2025-02-05 10:00:16,869 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:00:16,869 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2025-02-05 10:00:16,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:00:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 10:00:18,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:00:18,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836248143] [2025-02-05 10:00:18,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836248143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:00:18,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962062589] [2025-02-05 10:00:18,154 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:00:18,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:00:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:00:18,156 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 10:00:18,159 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 10:00:18,246 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 19 equivalence classes.