./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:16:48,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:16:48,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:16:48,593 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:16:48,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:16:48,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:16:48,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:16:48,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:16:48,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:16:48,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:16:48,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:16:48,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:16:48,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:16:48,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:16:48,647 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:16:48,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:16:48,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:16:48,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:16:48,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:16:48,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:16:48,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:16:48,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:16:48,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:16:48,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:16:48,651 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:16:48,651 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:16:48,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:16:48,652 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:16:48,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:16:48,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:16:48,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:16:48,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:16:48,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:16:48,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:16:48,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:16:48,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:16:48,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:16:48,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:16:48,663 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:16:48,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:16:48,663 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:16:48,664 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:16:48,664 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a [2024-10-13 22:16:48,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:16:48,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:16:48,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:16:48,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:16:48,930 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:16:48,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i [2024-10-13 22:16:50,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:16:50,599 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:16:50,600 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i [2024-10-13 22:16:50,607 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133b1e9b9/5feb046af4834fa78bf08289bea98ad7/FLAG87b79d01f [2024-10-13 22:16:50,618 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133b1e9b9/5feb046af4834fa78bf08289bea98ad7 [2024-10-13 22:16:50,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:16:50,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:16:50,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:16:50,624 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:16:50,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:16:50,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c682ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50, skipping insertion in model container [2024-10-13 22:16:50,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,652 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:16:50,810 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2024-10-13 22:16:50,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:16:50,821 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:16:50,853 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2024-10-13 22:16:50,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:16:50,875 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:16:50,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50 WrapperNode [2024-10-13 22:16:50,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:16:50,877 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:16:50,877 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:16:50,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:16:50,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,922 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-13 22:16:50,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:16:50,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:16:50,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:16:50,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:16:50,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,935 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,947 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-13 22:16:50,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:16:50,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:16:50,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:16:50,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:16:50,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (1/1) ... [2024-10-13 22:16:50,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:16:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:50,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 22:16:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 22:16:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:16:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2024-10-13 22:16:51,046 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2024-10-13 22:16:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:16:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:16:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:16:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:16:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:16:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:16:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:16:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:16:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:16:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:16:51,132 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:16:51,137 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:16:51,316 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-13 22:16:51,317 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:16:51,372 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:16:51,372 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:16:51,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:16:51 BoogieIcfgContainer [2024-10-13 22:16:51,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:16:51,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:16:51,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:16:51,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:16:51,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:16:50" (1/3) ... [2024-10-13 22:16:51,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9ce3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:16:51, skipping insertion in model container [2024-10-13 22:16:51,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:50" (2/3) ... [2024-10-13 22:16:51,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9ce3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:16:51, skipping insertion in model container [2024-10-13 22:16:51,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:16:51" (3/3) ... [2024-10-13 22:16:51,382 INFO L112 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2024-10-13 22:16:51,404 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:16:51,405 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:16:51,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:16:51,462 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;@11975f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:16:51,463 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:16:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:16:51,474 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:51,475 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:51,476 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:51,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:51,481 INFO L85 PathProgramCache]: Analyzing trace with hash -307325283, now seen corresponding path program 1 times [2024-10-13 22:16:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:51,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921143340] [2024-10-13 22:16:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:51,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-13 22:16:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:51,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 22:16:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:51,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 22:16:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:16:51,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921143340] [2024-10-13 22:16:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921143340] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984041945] [2024-10-13 22:16:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:51,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:51,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:51,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:16:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:51,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-13 22:16:51,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:16:51,994 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:16:51,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984041945] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:16:51,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:16:51,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-10-13 22:16:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557891442] [2024-10-13 22:16:51,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:16:52,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:16:52,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:16:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:16:52,029 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:52,056 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2024-10-13 22:16:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:16:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-10-13 22:16:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:52,065 INFO L225 Difference]: With dead ends: 38 [2024-10-13 22:16:52,065 INFO L226 Difference]: Without dead ends: 18 [2024-10-13 22:16:52,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:16:52,071 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:52,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-13 22:16:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-13 22:16:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-13 22:16:52,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2024-10-13 22:16:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:52,110 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-13 22:16:52,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-13 22:16:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:16:52,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:52,112 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:52,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 22:16:52,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-13 22:16:52,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:52,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash 871755747, now seen corresponding path program 1 times [2024-10-13 22:16:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:52,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204604471] [2024-10-13 22:16:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-13 22:16:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 22:16:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 22:16:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:16:52,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204604471] [2024-10-13 22:16:52,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204604471] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999102450] [2024-10-13 22:16:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:52,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:52,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:52,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:16:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:16:52,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:16:52,634 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:16:52,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999102450] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:16:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:16:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-13 22:16:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886771219] [2024-10-13 22:16:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:16:52,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:16:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:16:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:52,638 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:16:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:52,659 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-10-13 22:16:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:16:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-13 22:16:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:52,660 INFO L225 Difference]: With dead ends: 35 [2024-10-13 22:16:52,660 INFO L226 Difference]: Without dead ends: 19 [2024-10-13 22:16:52,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:52,662 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:52,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-13 22:16:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-13 22:16:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-10-13 22:16:52,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2024-10-13 22:16:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:52,670 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-10-13 22:16:52,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:16:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-10-13 22:16:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:16:52,671 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:52,672 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:52,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:16:52,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-13 22:16:52,876 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:52,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:52,877 INFO L85 PathProgramCache]: Analyzing trace with hash -25583204, now seen corresponding path program 1 times [2024-10-13 22:16:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843387577] [2024-10-13 22:16:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:52,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:16:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:16:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-13 22:16:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:16:53,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843387577] [2024-10-13 22:16:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843387577] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240112352] [2024-10-13 22:16:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:53,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:53,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:16:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:16:53,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 22:16:53,128 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:16:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240112352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:16:53,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:16:53,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-13 22:16:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408516340] [2024-10-13 22:16:53,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:16:53,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:16:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:16:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:53,131 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:53,147 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-10-13 22:16:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:16:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-13 22:16:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:53,148 INFO L225 Difference]: With dead ends: 34 [2024-10-13 22:16:53,149 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 22:16:53,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:53,153 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:53,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 22:16:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 22:16:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-13 22:16:53,163 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2024-10-13 22:16:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:53,164 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-13 22:16:53,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-13 22:16:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:16:53,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:53,167 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:53,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 22:16:53,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:53,372 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:53,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1557288968, now seen corresponding path program 1 times [2024-10-13 22:16:53,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:53,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21593103] [2024-10-13 22:16:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:53,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:16:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 22:16:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 22:16:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:16:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21593103] [2024-10-13 22:16:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21593103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519090946] [2024-10-13 22:16:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:53,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:53,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:16:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:16:53,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 22:16:53,607 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:16:53,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519090946] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:16:53,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:16:53,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-13 22:16:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275294687] [2024-10-13 22:16:53,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:16:53,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:16:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:16:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:53,610 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:53,637 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-13 22:16:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:16:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-13 22:16:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:53,638 INFO L225 Difference]: With dead ends: 32 [2024-10-13 22:16:53,638 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 22:16:53,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:16:53,641 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:53,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 22:16:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-13 22:16:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-13 22:16:53,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2024-10-13 22:16:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:53,653 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-13 22:16:53,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:16:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-13 22:16:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 22:16:53,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:53,657 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:53,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 22:16:53,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:53,858 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:53,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1460044313, now seen corresponding path program 1 times [2024-10-13 22:16:53,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:53,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029225682] [2024-10-13 22:16:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:16:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 22:16:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 22:16:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:16:53,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:53,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029225682] [2024-10-13 22:16:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029225682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:53,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404409491] [2024-10-13 22:16:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:53,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:53,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:53,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:16:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:54,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:16:54,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:16:54,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:16:54,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404409491] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:54,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-13 22:16:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168691858] [2024-10-13 22:16:54,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:54,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 22:16:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 22:16:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:16:54,117 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:16:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:54,153 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2024-10-13 22:16:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:16:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2024-10-13 22:16:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:54,155 INFO L225 Difference]: With dead ends: 42 [2024-10-13 22:16:54,155 INFO L226 Difference]: Without dead ends: 24 [2024-10-13 22:16:54,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:16:54,156 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:54,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-13 22:16:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-13 22:16:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-13 22:16:54,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2024-10-13 22:16:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:54,165 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-13 22:16:54,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:16:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-13 22:16:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-13 22:16:54,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:54,166 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:54,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:16:54,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:54,368 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:54,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1621992672, now seen corresponding path program 2 times [2024-10-13 22:16:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228592838] [2024-10-13 22:16:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:54,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:16:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:54,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:16:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:54,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:16:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:16:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228592838] [2024-10-13 22:16:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228592838] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291680257] [2024-10-13 22:16:54,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:16:54,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:54,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:54,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:16:54,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:16:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:16:54,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:16:54,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:16:54,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:16:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291680257] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:54,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:54,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-13 22:16:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986621167] [2024-10-13 22:16:54,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:54,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:16:54,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:16:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:16:54,728 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:16:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:54,762 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2024-10-13 22:16:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 22:16:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2024-10-13 22:16:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:54,763 INFO L225 Difference]: With dead ends: 49 [2024-10-13 22:16:54,763 INFO L226 Difference]: Without dead ends: 31 [2024-10-13 22:16:54,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:16:54,765 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:54,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-13 22:16:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-13 22:16:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-13 22:16:54,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2024-10-13 22:16:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:54,780 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-13 22:16:54,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:16:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-13 22:16:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 22:16:54,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:54,784 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:54,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:16:54,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:54,985 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:54,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1372615532, now seen corresponding path program 3 times [2024-10-13 22:16:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390732651] [2024-10-13 22:16:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:16:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 22:16:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-13 22:16:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-13 22:16:55,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:55,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390732651] [2024-10-13 22:16:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390732651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:55,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240656055] [2024-10-13 22:16:55,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:16:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:55,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:55,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:16:55,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 22:16:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:16:55,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:16:55,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-13 22:16:55,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-13 22:16:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240656055] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:55,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-13 22:16:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697260761] [2024-10-13 22:16:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:55,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 22:16:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 22:16:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:16:55,259 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:16:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:55,309 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2024-10-13 22:16:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:16:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-13 22:16:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:55,310 INFO L225 Difference]: With dead ends: 53 [2024-10-13 22:16:55,310 INFO L226 Difference]: Without dead ends: 36 [2024-10-13 22:16:55,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:16:55,311 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:55,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-13 22:16:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-13 22:16:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-13 22:16:55,320 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2024-10-13 22:16:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:55,320 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-13 22:16:55,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:16:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-13 22:16:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-13 22:16:55,322 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:55,322 INFO L215 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:55,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:16:55,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:55,523 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:55,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1486823267, now seen corresponding path program 4 times [2024-10-13 22:16:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:55,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458178885] [2024-10-13 22:16:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:16:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-13 22:16:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-13 22:16:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-13 22:16:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458178885] [2024-10-13 22:16:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458178885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385578711] [2024-10-13 22:16:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:16:55,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:55,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:55,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:16:55,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:16:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:16:55,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:16:55,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-13 22:16:55,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-13 22:16:56,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385578711] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:56,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:56,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2024-10-13 22:16:56,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516618476] [2024-10-13 22:16:56,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:56,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 22:16:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 22:16:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:16:56,186 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:16:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:56,251 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-10-13 22:16:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 22:16:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2024-10-13 22:16:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:56,252 INFO L225 Difference]: With dead ends: 72 [2024-10-13 22:16:56,252 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 22:16:56,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:16:56,253 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:56,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:16:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 22:16:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-13 22:16:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-10-13 22:16:56,260 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2024-10-13 22:16:56,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:56,261 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-10-13 22:16:56,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:16:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-10-13 22:16:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-13 22:16:56,262 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:56,262 INFO L215 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:56,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:16:56,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-13 22:16:56,468 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:56,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash -795614685, now seen corresponding path program 5 times [2024-10-13 22:16:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:56,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84967760] [2024-10-13 22:16:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:57,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-13 22:16:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:57,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:16:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:57,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-13 22:16:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-13 22:16:57,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84967760] [2024-10-13 22:16:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84967760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485602971] [2024-10-13 22:16:57,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:16:57,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:57,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:57,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:16:58,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-13 22:16:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:16:58,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:16:58,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-10-13 22:16:58,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-10-13 22:16:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485602971] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:58,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:58,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2024-10-13 22:16:58,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916605421] [2024-10-13 22:16:58,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:58,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 22:16:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 22:16:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:16:58,169 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:16:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:58,231 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-10-13 22:16:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-13 22:16:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2024-10-13 22:16:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:58,233 INFO L225 Difference]: With dead ends: 77 [2024-10-13 22:16:58,235 INFO L226 Difference]: Without dead ends: 53 [2024-10-13 22:16:58,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:16:58,237 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:58,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:16:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-13 22:16:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-13 22:16:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-10-13 22:16:58,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 67 [2024-10-13 22:16:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:58,251 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-10-13 22:16:58,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:16:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-10-13 22:16:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-13 22:16:58,253 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:58,253 INFO L215 NwaCegarLoop]: trace histogram [23, 18, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:58,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:16:58,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:58,454 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:16:58,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:16:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -566359460, now seen corresponding path program 6 times [2024-10-13 22:16:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:16:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513254664] [2024-10-13 22:16:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:16:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:16:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:59,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:16:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:59,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-13 22:16:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:59,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-13 22:16:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:16:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-10-13 22:16:59,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:16:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513254664] [2024-10-13 22:16:59,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513254664] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:16:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956407723] [2024-10-13 22:16:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:16:59,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:16:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:16:59,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:16:59,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:16:59,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-13 22:16:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:16:59,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:16:59,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:16:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-13 22:16:59,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:16:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-13 22:16:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956407723] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:16:59,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:16:59,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2024-10-13 22:16:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399475895] [2024-10-13 22:16:59,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:16:59,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-13 22:16:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:16:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-13 22:16:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 22:16:59,757 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:16:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:16:59,826 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-10-13 22:16:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-13 22:16:59,827 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2024-10-13 22:16:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:16:59,828 INFO L225 Difference]: With dead ends: 90 [2024-10-13 22:16:59,828 INFO L226 Difference]: Without dead ends: 62 [2024-10-13 22:16:59,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 22:16:59,829 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:16:59,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:16:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-13 22:16:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-13 22:16:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:16:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-10-13 22:16:59,836 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 72 [2024-10-13 22:16:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:16:59,836 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-10-13 22:16:59,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:16:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-10-13 22:16:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-13 22:16:59,837 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:16:59,837 INFO L215 NwaCegarLoop]: trace histogram [42, 24, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:16:59,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:17:00,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 22:17:00,042 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:00,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 206445699, now seen corresponding path program 7 times [2024-10-13 22:17:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188223835] [2024-10-13 22:17:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:00,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:17:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:00,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-13 22:17:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:00,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-13 22:17:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:00,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:00,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188223835] [2024-10-13 22:17:00,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188223835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:00,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629218193] [2024-10-13 22:17:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:17:00,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:00,797 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:17:00,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:17:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:00,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 22:17:00,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:01,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:01,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629218193] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:01,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:01,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 53 [2024-10-13 22:17:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221464095] [2024-10-13 22:17:01,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:01,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-13 22:17:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-13 22:17:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 22:17:01,840 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:01,912 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2024-10-13 22:17:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-13 22:17:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 97 [2024-10-13 22:17:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:01,913 INFO L225 Difference]: With dead ends: 124 [2024-10-13 22:17:01,913 INFO L226 Difference]: Without dead ends: 88 [2024-10-13 22:17:01,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 22:17:01,915 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:01,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:17:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-13 22:17:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-10-13 22:17:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2024-10-13 22:17:01,923 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 97 [2024-10-13 22:17:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:01,923 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2024-10-13 22:17:01,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2024-10-13 22:17:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-13 22:17:01,925 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:01,925 INFO L215 NwaCegarLoop]: trace histogram [50, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:01,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 22:17:02,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 22:17:02,126 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:02,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash -694462173, now seen corresponding path program 8 times [2024-10-13 22:17:02,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339970536] [2024-10-13 22:17:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:02,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:04,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-13 22:17:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:04,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-13 22:17:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:04,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-13 22:17:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:04,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:04,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339970536] [2024-10-13 22:17:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339970536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003194279] [2024-10-13 22:17:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:17:04,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:04,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:17:04,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:17:04,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:17:04,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:17:04,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-13 22:17:04,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:04,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003194279] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:07,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 105 [2024-10-13 22:17:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758359314] [2024-10-13 22:17:07,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:07,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-10-13 22:17:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-10-13 22:17:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2024-10-13 22:17:07,425 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 105 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:07,569 INFO L93 Difference]: Finished difference Result 176 states and 235 transitions. [2024-10-13 22:17:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-10-13 22:17:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 123 [2024-10-13 22:17:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:07,571 INFO L225 Difference]: With dead ends: 176 [2024-10-13 22:17:07,571 INFO L226 Difference]: Without dead ends: 140 [2024-10-13 22:17:07,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2024-10-13 22:17:07,574 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:07,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:17:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-13 22:17:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-10-13 22:17:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2024-10-13 22:17:07,589 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 123 [2024-10-13 22:17:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:07,589 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2024-10-13 22:17:07,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2024-10-13 22:17:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-10-13 22:17:07,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:07,593 INFO L215 NwaCegarLoop]: trace histogram [102, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:07,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 22:17:07,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 22:17:07,794 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:07,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:07,794 INFO L85 PathProgramCache]: Analyzing trace with hash 827734627, now seen corresponding path program 9 times [2024-10-13 22:17:07,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:07,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588177235] [2024-10-13 22:17:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:07,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:14,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-10-13 22:17:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:14,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-10-13 22:17:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:14,088 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-10-13 22:17:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6273 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-13 22:17:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588177235] [2024-10-13 22:17:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588177235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090948396] [2024-10-13 22:17:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:17:14,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:14,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:17:14,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:17:14,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 22:17:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:17:14,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:17:14,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6273 backedges. 456 proven. 21 refuted. 0 times theorem prover too weak. 5796 trivial. 0 not checked. [2024-10-13 22:17:14,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6273 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6252 trivial. 0 not checked. [2024-10-13 22:17:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090948396] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:14,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:14,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2024-10-13 22:17:14,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397196841] [2024-10-13 22:17:14,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:14,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-10-13 22:17:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-10-13 22:17:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2024-10-13 22:17:14,991 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 119 states have internal predecessors, (142), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:17:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:15,177 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2024-10-13 22:17:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-10-13 22:17:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 119 states have internal predecessors, (142), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 175 [2024-10-13 22:17:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:15,180 INFO L225 Difference]: With dead ends: 185 [2024-10-13 22:17:15,181 INFO L226 Difference]: Without dead ends: 149 [2024-10-13 22:17:15,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2024-10-13 22:17:15,186 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:15,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:17:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-13 22:17:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2024-10-13 22:17:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2024-10-13 22:17:15,209 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 175 [2024-10-13 22:17:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:15,209 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2024-10-13 22:17:15,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 119 states have internal predecessors, (142), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:17:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2024-10-13 22:17:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-10-13 22:17:15,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:15,212 INFO L215 NwaCegarLoop]: trace histogram [103, 42, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:15,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:17:15,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:17:15,416 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:15,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1996450084, now seen corresponding path program 10 times [2024-10-13 22:17:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589840870] [2024-10-13 22:17:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:15,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:21,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-10-13 22:17:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:21,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-10-13 22:17:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:21,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2024-10-13 22:17:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6460 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-10-13 22:17:21,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589840870] [2024-10-13 22:17:21,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589840870] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423727349] [2024-10-13 22:17:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:17:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:21,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:17:21,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:17:21,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:17:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:17:21,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 1356 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-13 22:17:21,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6460 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-10-13 22:17:21,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6460 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-10-13 22:17:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423727349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:32,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 106] total 211 [2024-10-13 22:17:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966699354] [2024-10-13 22:17:32,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:32,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2024-10-13 22:17:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2024-10-13 22:17:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2024-10-13 22:17:32,341 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 211 states, 211 states have (on average 1.085308056872038) internal successors, (229), 211 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:32,677 INFO L93 Difference]: Finished difference Result 298 states and 410 transitions. [2024-10-13 22:17:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2024-10-13 22:17:32,678 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.085308056872038) internal successors, (229), 211 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 184 [2024-10-13 22:17:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:32,679 INFO L225 Difference]: With dead ends: 298 [2024-10-13 22:17:32,679 INFO L226 Difference]: Without dead ends: 254 [2024-10-13 22:17:32,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2024-10-13 22:17:32,683 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:32,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:17:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-10-13 22:17:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2024-10-13 22:17:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0120481927710843) internal successors, (252), 249 states have internal predecessors, (252), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 258 transitions. [2024-10-13 22:17:32,704 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 258 transitions. Word has length 184 [2024-10-13 22:17:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:32,704 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 258 transitions. [2024-10-13 22:17:32,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.085308056872038) internal successors, (229), 211 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:17:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 258 transitions. [2024-10-13 22:17:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2024-10-13 22:17:32,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:32,708 INFO L215 NwaCegarLoop]: trace histogram [208, 42, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:32,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 22:17:32,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:32,908 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:32,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash -903757693, now seen corresponding path program 11 times [2024-10-13 22:17:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724463298] [2024-10-13 22:17:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:54,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2024-10-13 22:17:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:54,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2024-10-13 22:17:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:54,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2024-10-13 22:17:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22840 backedges. 0 proven. 21736 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-10-13 22:17:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724463298] [2024-10-13 22:17:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724463298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108959992] [2024-10-13 22:17:54,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:17:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:54,378 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:17:54,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process