./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:05:19,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:05:19,781 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:05:19,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:05:19,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:05:19,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:05:19,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:05:19,809 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:05:19,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:05:19,809 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:05:19,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:05:19,810 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:05:19,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:05:19,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:05:19,812 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:05:19,813 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:05:19,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:05:19,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:05:19,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:05:19,814 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 -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 [2025-02-07 21:05:20,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:05:20,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:05:20,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:05:20,074 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:05:20,074 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:05:20,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2025-02-07 21:05:21,377 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9bf86dc2/2f041e9489524264a6ebb44ce837fc45/FLAG8b35ad0f9 [2025-02-07 21:05:21,610 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:05:21,610 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2025-02-07 21:05:21,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9bf86dc2/2f041e9489524264a6ebb44ce837fc45/FLAG8b35ad0f9 [2025-02-07 21:05:21,938 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d9bf86dc2/2f041e9489524264a6ebb44ce837fc45 [2025-02-07 21:05:21,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:05:21,941 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:05:21,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:05:21,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:05:21,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:05:21,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:05:21" (1/1) ... [2025-02-07 21:05:21,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e8eac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:21, skipping insertion in model container [2025-02-07 21:05:21,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:05:21" (1/1) ... [2025-02-07 21:05:21,961 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:05:22,084 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/recursive-simple/id_i15_o15-1.c[454,467] [2025-02-07 21:05:22,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:05:22,097 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:05:22,105 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/recursive-simple/id_i15_o15-1.c[454,467] [2025-02-07 21:05:22,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:05:22,118 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:05:22,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22 WrapperNode [2025-02-07 21:05:22,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:05:22,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:05:22,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:05:22,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:05:22,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,141 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2025-02-07 21:05:22,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:05:22,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:05:22,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:05:22,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:05:22,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,150 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,162 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 21:05:22,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,163 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:05:22,171 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:05:22,171 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:05:22,171 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:05:22,172 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (1/1) ... [2025-02-07 21:05:22,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:05:22,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:22,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 21:05:22,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 21:05:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:05:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:05:22,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:05:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:05:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure id [2025-02-07 21:05:22,222 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2025-02-07 21:05:22,266 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:05:22,268 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:05:22,347 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2025-02-07 21:05:22,352 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-02-07 21:05:22,352 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:05:22,361 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:05:22,361 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:05:22,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:05:22 BoogieIcfgContainer [2025-02-07 21:05:22,362 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:05:22,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:05:22,364 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:05:22,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:05:22,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:05:21" (1/3) ... [2025-02-07 21:05:22,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f54d466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:05:22, skipping insertion in model container [2025-02-07 21:05:22,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:22" (2/3) ... [2025-02-07 21:05:22,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f54d466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:05:22, skipping insertion in model container [2025-02-07 21:05:22,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:05:22" (3/3) ... [2025-02-07 21:05:22,370 INFO L128 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2025-02-07 21:05:22,382 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:05:22,384 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG id_i15_o15-1.c that has 2 procedures, 15 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:05:22,421 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:05:22,430 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;@6ef07da7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:05:22,430 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:05:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:05:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 21:05:22,437 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:22,438 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:22,438 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:22,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2049432346, now seen corresponding path program 1 times [2025-02-07 21:05:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513408298] [2025-02-07 21:05:22,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:22,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 21:05:22,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 21:05:22,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:22,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:05:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513408298] [2025-02-07 21:05:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513408298] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:05:22,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:05:22,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:05:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332911168] [2025-02-07 21:05:22,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:05:22,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:05:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:22,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:05:22,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:05:22,640 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:05:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:22,691 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2025-02-07 21:05:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:05:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-02-07 21:05:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:22,698 INFO L225 Difference]: With dead ends: 24 [2025-02-07 21:05:22,699 INFO L226 Difference]: Without dead ends: 14 [2025-02-07 21:05:22,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:05:22,705 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:22,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-07 21:05:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-07 21:05:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:05:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2025-02-07 21:05:22,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2025-02-07 21:05:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:22,737 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2025-02-07 21:05:22,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:05:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2025-02-07 21:05:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 21:05:22,739 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:22,739 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:22,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:05:22,739 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:22,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1071660829, now seen corresponding path program 1 times [2025-02-07 21:05:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865080944] [2025-02-07 21:05:22,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:22,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:22,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:05:22,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:05:22,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:22,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:05:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865080944] [2025-02-07 21:05:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865080944] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034205649] [2025-02-07 21:05:22,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:22,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:22,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:22,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:22,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 21:05:22,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:05:22,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:05:22,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:22,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:22,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:05:22,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:05:22,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:05:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034205649] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:23,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-07 21:05:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424890570] [2025-02-07 21:05:23,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:23,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 21:05:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:23,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 21:05:23,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-07 21:05:23,212 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:05:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:23,277 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2025-02-07 21:05:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:05:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 15 [2025-02-07 21:05:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:23,279 INFO L225 Difference]: With dead ends: 21 [2025-02-07 21:05:23,279 INFO L226 Difference]: Without dead ends: 17 [2025-02-07 21:05:23,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:05:23,280 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:23,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-07 21:05:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-07 21:05:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:05:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-02-07 21:05:23,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2025-02-07 21:05:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:23,285 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-02-07 21:05:23,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:05:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-02-07 21:05:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 21:05:23,286 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:23,286 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:23,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 21:05:23,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:23,488 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:23,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 694941498, now seen corresponding path program 2 times [2025-02-07 21:05:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442169198] [2025-02-07 21:05:23,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:23,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:05:23,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:05:23,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:23,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:05:23,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442169198] [2025-02-07 21:05:23,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442169198] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145393951] [2025-02-07 21:05:23,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:23,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:23,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:23,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 21:05:23,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:05:23,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:05:23,723 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:23,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:23,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:05:23,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:05:23,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:05:24,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145393951] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:24,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:24,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-02-07 21:05:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478924154] [2025-02-07 21:05:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:24,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 21:05:24,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:24,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 21:05:24,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-07 21:05:24,109 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:05:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:24,203 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2025-02-07 21:05:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 21:05:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 21 [2025-02-07 21:05:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:24,205 INFO L225 Difference]: With dead ends: 24 [2025-02-07 21:05:24,205 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 21:05:24,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 21:05:24,205 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:24,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 21:05:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 21:05:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:05:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-02-07 21:05:24,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2025-02-07 21:05:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:24,214 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-02-07 21:05:24,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:05:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-02-07 21:05:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 21:05:24,216 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:24,216 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:24,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:24,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:24,420 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:24,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1868965309, now seen corresponding path program 3 times [2025-02-07 21:05:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:24,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412587285] [2025-02-07 21:05:24,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:24,427 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-07 21:05:24,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:05:24,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:05:24,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 21:05:24,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412587285] [2025-02-07 21:05:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412587285] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301233690] [2025-02-07 21:05:24,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:24,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:24,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:24,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 21:05:24,668 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-07 21:05:24,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:05:24,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:05:24,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:24,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 21:05:24,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 21:05:24,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:05:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301233690] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:25,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:25,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-02-07 21:05:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070025891] [2025-02-07 21:05:25,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:25,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:05:25,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:25,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:05:25,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:05:25,172 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:05:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:25,253 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2025-02-07 21:05:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:05:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 27 [2025-02-07 21:05:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:25,254 INFO L225 Difference]: With dead ends: 27 [2025-02-07 21:05:25,254 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 21:05:25,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-02-07 21:05:25,255 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:25,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 21:05:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 21:05:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 21:05:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-02-07 21:05:25,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2025-02-07 21:05:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:25,258 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-02-07 21:05:25,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:05:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-02-07 21:05:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 21:05:25,259 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:25,259 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:25,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 21:05:25,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:25,463 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:25,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1787489114, now seen corresponding path program 4 times [2025-02-07 21:05:25,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:25,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850324609] [2025-02-07 21:05:25,464 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:25,468 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-02-07 21:05:25,478 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:05:25,479 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:25,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 21:05:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850324609] [2025-02-07 21:05:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850324609] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069658898] [2025-02-07 21:05:25,623 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:25,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:25,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:25,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 21:05:25,655 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-02-07 21:05:25,667 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:05:25,667 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:25,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:25,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:05:25,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:05:25,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 21:05:26,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069658898] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:26,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:26,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 20 [2025-02-07 21:05:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364263239] [2025-02-07 21:05:26,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:26,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 21:05:26,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:26,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 21:05:26,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:05:26,333 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:05:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:26,441 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2025-02-07 21:05:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:05:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 33 [2025-02-07 21:05:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:26,442 INFO L225 Difference]: With dead ends: 42 [2025-02-07 21:05:26,443 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 21:05:26,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:05:26,444 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:26,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 65 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 21:05:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2025-02-07 21:05:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 21:05:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-02-07 21:05:26,451 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2025-02-07 21:05:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:26,451 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-02-07 21:05:26,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:05:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-02-07 21:05:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 21:05:26,453 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:26,454 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:26,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 21:05:26,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:26,654 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:26,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 507757827, now seen corresponding path program 5 times [2025-02-07 21:05:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:26,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707083033] [2025-02-07 21:05:26,655 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:26,662 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-02-07 21:05:26,679 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:05:26,680 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:05:26,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 21:05:26,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707083033] [2025-02-07 21:05:26,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707083033] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064366877] [2025-02-07 21:05:26,838 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:26,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 21:05:26,873 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-02-07 21:05:26,887 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:05:26,888 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:05:26,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:26,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 21:05:26,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-02-07 21:05:26,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 21:05:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064366877] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:28,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 22 [2025-02-07 21:05:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471035937] [2025-02-07 21:05:28,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:28,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 21:05:28,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:28,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 21:05:28,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2025-02-07 21:05:28,864 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-07 21:05:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:28,971 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2025-02-07 21:05:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:05:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 51 [2025-02-07 21:05:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:28,972 INFO L225 Difference]: With dead ends: 48 [2025-02-07 21:05:28,972 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 21:05:28,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:05:28,974 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:28,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 68 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 21:05:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2025-02-07 21:05:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-07 21:05:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2025-02-07 21:05:28,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 51 [2025-02-07 21:05:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:28,979 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2025-02-07 21:05:28,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-07 21:05:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2025-02-07 21:05:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 21:05:28,980 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:28,980 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:28,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 21:05:29,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:29,181 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:29,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -617522278, now seen corresponding path program 6 times [2025-02-07 21:05:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779023612] [2025-02-07 21:05:29,181 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:29,190 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-02-07 21:05:29,206 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 21:05:29,206 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:29,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 130 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 21:05:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:29,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779023612] [2025-02-07 21:05:29,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779023612] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162263567] [2025-02-07 21:05:29,442 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:29,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:29,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:29,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:29,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 21:05:29,499 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-02-07 21:05:29,517 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 21:05:29,517 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:29,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:29,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 21:05:29,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 21:05:29,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 21:05:31,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162263567] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:31,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:31,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 21] total 28 [2025-02-07 21:05:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810169144] [2025-02-07 21:05:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:31,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 21:05:31,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:31,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 21:05:31,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2025-02-07 21:05:31,872 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2025-02-07 21:05:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:32,008 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2025-02-07 21:05:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:05:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) Word has length 57 [2025-02-07 21:05:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:32,013 INFO L225 Difference]: With dead ends: 51 [2025-02-07 21:05:32,013 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 21:05:32,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=866, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 21:05:32,014 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:32,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 85 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 21:05:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2025-02-07 21:05:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-02-07 21:05:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-02-07 21:05:32,024 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 57 [2025-02-07 21:05:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:32,024 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-02-07 21:05:32,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2025-02-07 21:05:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-02-07 21:05:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-07 21:05:32,025 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:32,025 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:32,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:32,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-07 21:05:32,226 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:32,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1351063139, now seen corresponding path program 7 times [2025-02-07 21:05:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114822673] [2025-02-07 21:05:32,228 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:32,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:32,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 21:05:32,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:05:32,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:32,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-02-07 21:05:32,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:32,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114822673] [2025-02-07 21:05:32,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114822673] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:32,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034820612] [2025-02-07 21:05:32,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:32,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:32,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:32,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:32,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 21:05:32,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 21:05:32,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:05:32,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:32,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:32,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 21:05:32,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-02-07 21:05:32,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 21:05:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034820612] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:35,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-02-07 21:05:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743588209] [2025-02-07 21:05:35,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:35,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 21:05:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:35,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 21:05:35,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:05:35,358 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-02-07 21:05:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:35,484 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2025-02-07 21:05:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 21:05:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 63 [2025-02-07 21:05:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:35,485 INFO L225 Difference]: With dead ends: 54 [2025-02-07 21:05:35,486 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 21:05:35,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:05:35,487 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 128 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:35,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 76 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 21:05:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2025-02-07 21:05:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2025-02-07 21:05:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-02-07 21:05:35,492 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 63 [2025-02-07 21:05:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:35,492 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-02-07 21:05:35,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-02-07 21:05:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-02-07 21:05:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-07 21:05:35,493 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:35,493 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:35,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 21:05:35,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:35,697 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:35,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1612392518, now seen corresponding path program 8 times [2025-02-07 21:05:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549744727] [2025-02-07 21:05:35,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:35,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-07 21:05:35,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 21:05:35,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:35,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-02-07 21:05:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549744727] [2025-02-07 21:05:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549744727] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163347324] [2025-02-07 21:05:35,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:35,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:35,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 21:05:36,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-07 21:05:36,036 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 21:05:36,036 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:36,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:36,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 21:05:36,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-02-07 21:05:36,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 21:05:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163347324] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:39,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 29 [2025-02-07 21:05:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232775687] [2025-02-07 21:05:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:39,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 21:05:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:39,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 21:05:39,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:05:39,723 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-02-07 21:05:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:39,904 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2025-02-07 21:05:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:05:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 69 [2025-02-07 21:05:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:39,906 INFO L225 Difference]: With dead ends: 57 [2025-02-07 21:05:39,906 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 21:05:39,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:05:39,907 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:39,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 90 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 21:05:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2025-02-07 21:05:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-07 21:05:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2025-02-07 21:05:39,911 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2025-02-07 21:05:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:39,911 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2025-02-07 21:05:39,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-02-07 21:05:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2025-02-07 21:05:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 21:05:39,912 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:39,912 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:39,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 21:05:40,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:40,113 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:40,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1119006781, now seen corresponding path program 9 times [2025-02-07 21:05:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:40,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938692885] [2025-02-07 21:05:40,113 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:40,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-02-07 21:05:40,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:05:40,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-07 21:05:40,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 224 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-02-07 21:05:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938692885] [2025-02-07 21:05:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938692885] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741152682] [2025-02-07 21:05:40,394 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:40,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:40,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:40,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 21:05:40,613 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-02-07 21:05:40,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:05:40,634 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-07 21:05:40,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:40,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 21:05:40,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-02-07 21:05:40,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 21:05:45,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741152682] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:45,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:45,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 27] total 34 [2025-02-07 21:05:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70133452] [2025-02-07 21:05:45,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:45,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 21:05:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:45,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 21:05:45,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:05:45,168 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-02-07 21:05:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:45,313 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2025-02-07 21:05:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:05:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) Word has length 75 [2025-02-07 21:05:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:45,317 INFO L225 Difference]: With dead ends: 60 [2025-02-07 21:05:45,317 INFO L226 Difference]: Without dead ends: 53 [2025-02-07 21:05:45,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1352, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 21:05:45,318 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:45,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 105 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-07 21:05:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2025-02-07 21:05:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2025-02-07 21:05:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2025-02-07 21:05:45,326 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 75 [2025-02-07 21:05:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:45,327 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2025-02-07 21:05:45,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-02-07 21:05:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2025-02-07 21:05:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-07 21:05:45,329 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:45,329 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:45,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:45,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:45,530 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:45,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash -523555878, now seen corresponding path program 10 times [2025-02-07 21:05:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:45,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067437884] [2025-02-07 21:05:45,530 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:45,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:45,538 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-07 21:05:45,544 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 21:05:45,545 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:45,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2025-02-07 21:05:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067437884] [2025-02-07 21:05:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067437884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222092424] [2025-02-07 21:05:45,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:45,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:45,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 21:05:45,972 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-07 21:05:45,989 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 21:05:45,989 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:45,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:45,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-07 21:05:45,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-07 21:05:46,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 21:05:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222092424] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:51,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 36 [2025-02-07 21:05:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528414210] [2025-02-07 21:05:51,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:51,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 21:05:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:51,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 21:05:51,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 21:05:51,741 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-02-07 21:05:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:51,918 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2025-02-07 21:05:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 21:05:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) Word has length 81 [2025-02-07 21:05:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:51,919 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:05:51,919 INFO L226 Difference]: Without dead ends: 62 [2025-02-07 21:05:51,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2025-02-07 21:05:51,920 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:51,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-07 21:05:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2025-02-07 21:05:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2025-02-07 21:05:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2025-02-07 21:05:51,926 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 81 [2025-02-07 21:05:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:51,926 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2025-02-07 21:05:51,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-02-07 21:05:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2025-02-07 21:05:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-02-07 21:05:51,927 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:51,927 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:51,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 21:05:52,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:52,131 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:52,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1241938563, now seen corresponding path program 11 times [2025-02-07 21:05:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:52,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386799186] [2025-02-07 21:05:52,131 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:52,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:52,139 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 16 equivalence classes. [2025-02-07 21:05:52,153 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 99 of 99 statements. [2025-02-07 21:05:52,153 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-07 21:05:52,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-02-07 21:05:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386799186] [2025-02-07 21:05:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386799186] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171044385] [2025-02-07 21:05:52,748 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:52,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:52,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:52,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 21:05:53,065 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 16 equivalence classes. [2025-02-07 21:05:53,086 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 99 of 99 statements. [2025-02-07 21:05:53,086 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-07 21:05:53,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:53,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-02-07 21:05:53,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-02-07 21:05:53,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-02-07 21:05:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171044385] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:53,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2025-02-07 21:05:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780171109] [2025-02-07 21:05:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:53,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 21:05:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:53,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 21:05:53,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:05:53,750 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2025-02-07 21:05:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:53,985 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2025-02-07 21:05:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 21:05:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 99 [2025-02-07 21:05:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:53,994 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:05:53,994 INFO L226 Difference]: Without dead ends: 65 [2025-02-07 21:05:53,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:05:53,994 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:53,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1119 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:05:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-07 21:05:54,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2025-02-07 21:05:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2025-02-07 21:05:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2025-02-07 21:05:54,002 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 99 [2025-02-07 21:05:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:54,003 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2025-02-07 21:05:54,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2025-02-07 21:05:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2025-02-07 21:05:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-02-07 21:05:54,004 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:54,004 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:54,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 21:05:54,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 21:05:54,205 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:54,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -938976230, now seen corresponding path program 12 times [2025-02-07 21:05:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:54,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870049266] [2025-02-07 21:05:54,206 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:54,214 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 17 equivalence classes. [2025-02-07 21:05:54,230 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 105 of 105 statements. [2025-02-07 21:05:54,230 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:05:54,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 367 proven. 143 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-02-07 21:05:54,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870049266] [2025-02-07 21:05:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870049266] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707877067] [2025-02-07 21:05:54,595 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:54,596 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:54,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 21:05:54,921 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 17 equivalence classes. [2025-02-07 21:05:54,951 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 105 of 105 statements. [2025-02-07 21:05:54,951 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:05:54,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:54,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-07 21:05:54,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-02-07 21:05:55,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 21:05:55,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707877067] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:05:55,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 21:05:55,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [24] total 26 [2025-02-07 21:05:55,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747584155] [2025-02-07 21:05:55,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:05:55,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 21:05:55,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:55,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 21:05:55,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2025-02-07 21:05:55,045 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2025-02-07 21:05:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:55,200 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2025-02-07 21:05:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 21:05:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2025-02-07 21:05:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:55,201 INFO L225 Difference]: With dead ends: 65 [2025-02-07 21:05:55,201 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 21:05:55,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=1209, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 21:05:55,202 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:55,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 165 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 21:05:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 21:05:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:05:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 21:05:55,202 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2025-02-07 21:05:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:55,203 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 21:05:55,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2025-02-07 21:05:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 21:05:55,203 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 21:05:55,204 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 21:05:55,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:55,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:55,407 INFO L422 BasicCegarLoop]: Path program histogram: [12, 1] [2025-02-07 21:05:55,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 21:05:56,051 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 21:05:56,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 09:05:56 BoogieIcfgContainer [2025-02-07 21:05:56,056 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 21:05:56,057 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 21:05:56,057 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 21:05:56,057 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 21:05:56,057 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:05:22" (3/4) ... [2025-02-07 21:05:56,059 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 21:05:56,062 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure id [2025-02-07 21:05:56,064 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-02-07 21:05:56,064 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-07 21:05:56,064 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 21:05:56,064 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 21:05:56,109 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 21:05:56,110 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 21:05:56,110 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 21:05:56,111 INFO L158 Benchmark]: Toolchain (without parser) took 34169.30ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 114.3MB in the beginning and 158.9MB in the end (delta: -44.6MB). Peak memory consumption was 218.4MB. Max. memory is 16.1GB. [2025-02-07 21:05:56,111 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:56,111 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.04ms. Allocated memory is still 142.6MB. Free memory was 113.9MB in the beginning and 103.6MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 21:05:56,111 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.36ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 102.7MB in the end (delta: 892.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:56,111 INFO L158 Benchmark]: Boogie Preprocessor took 29.05ms. Allocated memory is still 142.6MB. Free memory was 102.7MB in the beginning and 101.7MB in the end (delta: 939.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:56,111 INFO L158 Benchmark]: IcfgBuilder took 191.03ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 90.8MB in the end (delta: 10.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-07 21:05:56,112 INFO L158 Benchmark]: TraceAbstraction took 33692.64ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 90.3MB in the beginning and 167.2MB in the end (delta: -76.9MB). Peak memory consumption was 220.8MB. Max. memory is 16.1GB. [2025-02-07 21:05:56,112 INFO L158 Benchmark]: Witness Printer took 53.02ms. Allocated memory is still 411.0MB. Free memory was 167.2MB in the beginning and 158.9MB in the end (delta: 8.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:56,113 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.04ms. Allocated memory is still 142.6MB. Free memory was 113.9MB in the beginning and 103.6MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.36ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 102.7MB in the end (delta: 892.0kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.05ms. Allocated memory is still 142.6MB. Free memory was 102.7MB in the beginning and 101.7MB in the end (delta: 939.2kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 191.03ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 90.8MB in the end (delta: 10.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 33692.64ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 90.3MB in the beginning and 167.2MB in the end (delta: -76.9MB). Peak memory consumption was 220.8MB. Max. memory is 16.1GB. * Witness Printer took 53.02ms. Allocated memory is still 411.0MB. Free memory was 167.2MB in the beginning and 158.9MB in the end (delta: 8.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.0s, OverallIterations: 13, TraceHistogramMax: 17, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 819 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 735 mSDsluCounter, 2057 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1868 mSDsCounter, 360 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1485 IncrementalHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 360 mSolverCounterUnsat, 189 mSDtfsCounter, 1485 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1617 GetRequests, 1175 SyntacticMatches, 77 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=12, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 24 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 26.6s InterpolantComputationTime, 1401 NumberOfCodeBlocks, 1401 NumberOfCodeBlocksAsserted, 153 NumberOfCheckSat, 1956 ConstructedInterpolants, 0 QuantifiedInterpolants, 5508 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1876 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 36 InterpolantComputations, 2 PerfectInterpolantSequences, 4497/9140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-07 21:05:56,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE