./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_1+newton_3_7.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/combinations/gcd_1+newton_3_7.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 61ffc5d3104f879fcd66a8ed550fe0d20a910c87b717c72a3dc729bb40cff29b --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 17:22:54,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 17:22:54,916 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 17:22:54,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 17:22:54,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 17:22:54,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 17:22:54,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 17:22:54,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 17:22:54,948 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 17:22:54,948 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 17:22:54,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 17:22:54,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 17:22:54,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 17:22:54,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 17:22:54,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 17:22:54,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 17:22:54,950 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 17:22:54,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:22:54,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 17:22:54,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 17:22:54,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 17:22:54,952 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 -> 61ffc5d3104f879fcd66a8ed550fe0d20a910c87b717c72a3dc729bb40cff29b [2025-02-05 17:22:55,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 17:22:55,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 17:22:55,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 17:22:55,205 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 17:22:55,206 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 17:22:55,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_1+newton_3_7.i [2025-02-05 17:22:56,465 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7be8974cd/b43669044c804247bd46314c608fb35b/FLAGfb50074dd [2025-02-05 17:22:56,725 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 17:22:56,729 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i [2025-02-05 17:22:56,738 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7be8974cd/b43669044c804247bd46314c608fb35b/FLAGfb50074dd [2025-02-05 17:22:56,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7be8974cd/b43669044c804247bd46314c608fb35b [2025-02-05 17:22:56,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 17:22:56,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 17:22:56,763 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 17:22:56,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 17:22:56,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 17:22:56,768 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:22:56" (1/1) ... [2025-02-05 17:22:56,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e633ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:56, skipping insertion in model container [2025-02-05 17:22:56,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:22:56" (1/1) ... [2025-02-05 17:22:56,787 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 17:22:56,919 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/combinations/gcd_1+newton_3_7.i[1226,1239] [2025-02-05 17:22:56,950 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/combinations/gcd_1+newton_3_7.i[2828,2841] [2025-02-05 17:22:56,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:22:56,967 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 17:22:56,976 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/combinations/gcd_1+newton_3_7.i[1226,1239] [2025-02-05 17:22:56,990 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/combinations/gcd_1+newton_3_7.i[2828,2841] [2025-02-05 17:22:56,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:22:57,009 INFO L204 MainTranslator]: Completed translation [2025-02-05 17:22:57,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57 WrapperNode [2025-02-05 17:22:57,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 17:22:57,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 17:22:57,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 17:22:57,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 17:22:57,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,046 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2025-02-05 17:22:57,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 17:22:57,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 17:22:57,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 17:22:57,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 17:22:57,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,081 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-02-05 17:22:57,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,089 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 17:22:57,101 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 17:22:57,101 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 17:22:57,101 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 17:22:57,102 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (1/1) ... [2025-02-05 17:22:57,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:22:57,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:22:57,133 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 17:22:57,139 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 17:22:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 17:22:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2025-02-05 17:22:57,158 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2025-02-05 17:22:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-02-05 17:22:57,158 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-02-05 17:22:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 17:22:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 17:22:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 17:22:57,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 17:22:57,224 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 17:22:57,225 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 17:22:57,391 INFO L? ?]: Removed 30 outVars from TransFormulas that were not future-live. [2025-02-05 17:22:57,391 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 17:22:57,403 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 17:22:57,403 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 17:22:57,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:22:57 BoogieIcfgContainer [2025-02-05 17:22:57,403 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 17:22:57,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 17:22:57,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 17:22:57,411 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 17:22:57,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 05:22:56" (1/3) ... [2025-02-05 17:22:57,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd2ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:22:57, skipping insertion in model container [2025-02-05 17:22:57,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:22:57" (2/3) ... [2025-02-05 17:22:57,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd2ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:22:57, skipping insertion in model container [2025-02-05 17:22:57,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:22:57" (3/3) ... [2025-02-05 17:22:57,414 INFO L128 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_7.i [2025-02-05 17:22:57,426 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 17:22:57,428 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG gcd_1+newton_3_7.i that has 3 procedures, 39 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2025-02-05 17:22:57,478 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 17:22:57,491 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;@53887539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 17:22:57,491 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-05 17:22:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:22:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 17:22:57,501 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:22:57,502 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:22:57,503 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:22:57,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:22:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1476885447, now seen corresponding path program 1 times [2025-02-05 17:22:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:22:57,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297252688] [2025-02-05 17:22:57,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:22:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:22:57,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 17:22:57,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 17:22:57,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:22:57,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:22:57,837 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 17:22:57,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:22:57,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297252688] [2025-02-05 17:22:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297252688] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:22:57,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:22:57,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:22:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145463161] [2025-02-05 17:22:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:22:57,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:22:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:22:57,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:22:57,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:22:57,868 INFO L87 Difference]: Start difference. First operand has 39 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:22:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:22:57,912 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2025-02-05 17:22:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:22:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-05 17:22:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:22:57,919 INFO L225 Difference]: With dead ends: 72 [2025-02-05 17:22:57,920 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 17:22:57,922 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 17:22:57,925 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 17:22:57,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:22:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 17:22:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 17:22:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:22:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-02-05 17:22:57,964 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 10 [2025-02-05 17:22:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:22:57,965 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-02-05 17:22:57,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:22:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-02-05 17:22:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 17:22:57,967 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:22:57,968 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:22:57,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 17:22:57,968 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:22:57,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:22:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1490805615, now seen corresponding path program 1 times [2025-02-05 17:22:57,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:22:57,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344393657] [2025-02-05 17:22:57,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:22:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:22:57,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 17:22:57,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 17:22:57,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:22:57,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:22:58,224 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 17:22:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:22:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344393657] [2025-02-05 17:22:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344393657] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 17:22:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441577777] [2025-02-05 17:22:58,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:22:58,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:22:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:22:58,228 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 17:22:58,229 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 17:22:58,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 17:22:58,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 17:22:58,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:22:58,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:22:58,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 17:22:58,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:22:58,355 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 17:22:58,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:22:58,392 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 17:22:58,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441577777] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:22:58,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 17:22:58,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2025-02-05 17:22:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910955736] [2025-02-05 17:22:58,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 17:22:58,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 17:22:58,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:22:58,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 17:22:58,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 17:22:58,395 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 17:22:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:22:58,447 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2025-02-05 17:22:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 17:22:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) Word has length 11 [2025-02-05 17:22:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:22:58,450 INFO L225 Difference]: With dead ends: 37 [2025-02-05 17:22:58,450 INFO L226 Difference]: Without dead ends: 33 [2025-02-05 17:22:58,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 17:22:58,452 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 17:22:58,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 149 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:22:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-05 17:22:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-05 17:22:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:22:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2025-02-05 17:22:58,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2025-02-05 17:22:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:22:58,460 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2025-02-05 17:22:58,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 17:22:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2025-02-05 17:22:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 17:22:58,462 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:22:58,462 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:22:58,470 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 17:22:58,662 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 17:22:58,663 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:22:58,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:22:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1028681126, now seen corresponding path program 2 times [2025-02-05 17:22:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:22:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175022148] [2025-02-05 17:22:58,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 17:22:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:22:58,680 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-05 17:22:58,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 17:22:58,766 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 17:22:58,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 17:22:58,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752720841] [2025-02-05 17:22:58,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 17:22:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:22:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:22:58,772 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 17:22:58,774 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 17:22:58,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-05 17:23:02,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 17:23:02,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 17:23:02,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:23:02,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-05 17:23:02,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:23:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:23:09,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:24:09,382 WARN L286 SmtUtils]: Spent 34.45s on a formula simplification. DAG size of input: 125 DAG size of output: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 17:24:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:24:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:24:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175022148] [2025-02-05 17:24:38,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 17:24:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752720841] [2025-02-05 17:24:38,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752720841] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:24:38,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 17:24:38,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2025-02-05 17:24:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933216985] [2025-02-05 17:24:38,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 17:24:38,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 17:24:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:24:38,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 17:24:38,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=139, Unknown=3, NotChecked=0, Total=182 [2025-02-05 17:24:38,691 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)