./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-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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-cav19/array_init_var_plus_ind3.c -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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 20:01:21,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 20:01:21,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 20:01:21,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 20:01:21,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 20:01:21,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 20:01:21,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 20:01:21,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 20:01:21,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 20:01:21,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 20:01:21,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 20:01:21,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 20:01:21,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 20:01:21,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 20:01:21,258 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 20:01:21,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 20:01:21,259 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 20:01:21,259 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 20:01:21,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 20:01:21,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 20:01:21,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 20:01:21,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 20:01:21,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 20:01:21,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 20:01:21,265 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 20:01:21,265 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 20:01:21,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 20:01:21,265 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 20:01:21,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 20:01:21,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 20:01:21,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 20:01:21,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 20:01:21,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 20:01:21,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 20:01:21,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 20:01:21,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 20:01:21,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 20:01:21,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 20:01:21,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 20:01:21,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 20:01:21,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 20:01:21,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 20:01:21,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2024-10-23 20:01:21,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 20:01:21,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 20:01:21,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 20:01:21,486 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 20:01:21,490 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 20:01:21,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2024-10-23 20:01:22,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 20:01:22,917 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 20:01:22,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2024-10-23 20:01:22,925 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f040d28cc/068810f3b9fc44f38f844878a9a3da78/FLAG3be45ec74 [2024-10-23 20:01:23,321 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f040d28cc/068810f3b9fc44f38f844878a9a3da78 [2024-10-23 20:01:23,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 20:01:23,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 20:01:23,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 20:01:23,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 20:01:23,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 20:01:23,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ae7df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23, skipping insertion in model container [2024-10-23 20:01:23,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,370 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 20:01:23,550 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-cav19/array_init_var_plus_ind3.c[415,428] [2024-10-23 20:01:23,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 20:01:23,578 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 20:01:23,589 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-cav19/array_init_var_plus_ind3.c[415,428] [2024-10-23 20:01:23,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 20:01:23,608 INFO L204 MainTranslator]: Completed translation [2024-10-23 20:01:23,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23 WrapperNode [2024-10-23 20:01:23,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 20:01:23,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 20:01:23,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 20:01:23,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 20:01:23,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,639 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2024-10-23 20:01:23,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 20:01:23,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 20:01:23,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 20:01:23,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 20:01:23,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,652 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,662 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-23 20:01:23,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 20:01:23,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 20:01:23,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 20:01:23,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 20:01:23,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (1/1) ... [2024-10-23 20:01:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 20:01:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:23,703 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) [2024-10-23 20:01:23,705 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 [2024-10-23 20:01:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 20:01:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 20:01:23,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 20:01:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 20:01:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 20:01:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 20:01:23,799 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 20:01:23,800 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 20:01:23,901 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-23 20:01:23,902 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 20:01:23,923 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 20:01:23,923 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-23 20:01:23,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:01:23 BoogieIcfgContainer [2024-10-23 20:01:23,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 20:01:23,926 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 20:01:23,926 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 20:01:23,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 20:01:23,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:01:23" (1/3) ... [2024-10-23 20:01:23,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cc3024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:01:23, skipping insertion in model container [2024-10-23 20:01:23,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:01:23" (2/3) ... [2024-10-23 20:01:23,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cc3024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:01:23, skipping insertion in model container [2024-10-23 20:01:23,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:01:23" (3/3) ... [2024-10-23 20:01:23,931 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2024-10-23 20:01:23,953 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 20:01:23,954 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 20:01:23,999 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 20:01:24,005 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;@1a101b08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 20:01:24,005 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 20:01:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-23 20:01:24,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:24,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-23 20:01:24,014 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:24,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1929175509, now seen corresponding path program 1 times [2024-10-23 20:01:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304714090] [2024-10-23 20:01:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:24,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:24,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304714090] [2024-10-23 20:01:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304714090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:01:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:01:24,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 20:01:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480835511] [2024-10-23 20:01:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:01:24,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 20:01:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 20:01:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 20:01:24,197 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:24,214 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2024-10-23 20:01:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 20:01:24,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-23 20:01:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:24,224 INFO L225 Difference]: With dead ends: 19 [2024-10-23 20:01:24,225 INFO L226 Difference]: Without dead ends: 9 [2024-10-23 20:01:24,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 20:01:24,229 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:24,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-10-23 20:01:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-10-23 20:01:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-10-23 20:01:24,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-10-23 20:01:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:24,252 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-10-23 20:01:24,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-10-23 20:01:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-23 20:01:24,252 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:24,253 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-23 20:01:24,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 20:01:24,253 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:24,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1939334240, now seen corresponding path program 1 times [2024-10-23 20:01:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:24,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957545516] [2024-10-23 20:01:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957545516] [2024-10-23 20:01:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957545516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:01:24,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:01:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 20:01:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440128642] [2024-10-23 20:01:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:01:24,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 20:01:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:24,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 20:01:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:01:24,333 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:24,353 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-10-23 20:01:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 20:01:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-23 20:01:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:24,354 INFO L225 Difference]: With dead ends: 23 [2024-10-23 20:01:24,354 INFO L226 Difference]: Without dead ends: 17 [2024-10-23 20:01:24,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:01:24,355 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:24,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-23 20:01:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2024-10-23 20:01:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-10-23 20:01:24,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2024-10-23 20:01:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:24,362 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-10-23 20:01:24,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-10-23 20:01:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-23 20:01:24,362 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:24,362 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:24,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 20:01:24,363 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:24,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 59809599, now seen corresponding path program 1 times [2024-10-23 20:01:24,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:24,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807946825] [2024-10-23 20:01:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807946825] [2024-10-23 20:01:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807946825] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:01:24,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:01:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 20:01:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650762995] [2024-10-23 20:01:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:01:24,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 20:01:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 20:01:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 20:01:24,456 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:24,488 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2024-10-23 20:01:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 20:01:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-23 20:01:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:24,489 INFO L225 Difference]: With dead ends: 18 [2024-10-23 20:01:24,489 INFO L226 Difference]: Without dead ends: 11 [2024-10-23 20:01:24,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 20:01:24,490 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:24,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-23 20:01:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-23 20:01:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-23 20:01:24,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2024-10-23 20:01:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:24,497 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-23 20:01:24,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-23 20:01:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-23 20:01:24,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:24,498 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:24,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 20:01:24,499 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:24,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1422467303, now seen corresponding path program 1 times [2024-10-23 20:01:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:24,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339108224] [2024-10-23 20:01:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:24,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339108224] [2024-10-23 20:01:24,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339108224] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934727840] [2024-10-23 20:01:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:24,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:24,608 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) [2024-10-23 20:01:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 20:01:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:24,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 20:01:24,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:24,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934727840] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:24,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-23 20:01:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815868331] [2024-10-23 20:01:24,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:24,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-23 20:01:24,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-23 20:01:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-23 20:01:24,742 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:24,806 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-23 20:01:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 20:01:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-23 20:01:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:24,807 INFO L225 Difference]: With dead ends: 36 [2024-10-23 20:01:24,807 INFO L226 Difference]: Without dead ends: 28 [2024-10-23 20:01:24,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-23 20:01:24,808 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:24,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-23 20:01:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2024-10-23 20:01:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-10-23 20:01:24,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2024-10-23 20:01:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:24,812 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-10-23 20:01:24,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-10-23 20:01:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-23 20:01:24,813 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:24,813 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:24,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 20:01:25,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:25,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:25,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -572020531, now seen corresponding path program 1 times [2024-10-23 20:01:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001094536] [2024-10-23 20:01:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:25,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:25,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001094536] [2024-10-23 20:01:25,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001094536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:25,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954425709] [2024-10-23 20:01:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:25,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:25,125 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) [2024-10-23 20:01:25,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 20:01:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:25,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 20:01:25,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:25,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954425709] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:25,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-23 20:01:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613984560] [2024-10-23 20:01:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:25,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-23 20:01:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-23 20:01:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-23 20:01:25,310 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:25,365 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-10-23 20:01:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:01:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-23 20:01:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:25,366 INFO L225 Difference]: With dead ends: 30 [2024-10-23 20:01:25,366 INFO L226 Difference]: Without dead ends: 19 [2024-10-23 20:01:25,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-10-23 20:01:25,367 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:25,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-23 20:01:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-23 20:01:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-10-23 20:01:25,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2024-10-23 20:01:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:25,376 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-10-23 20:01:25,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-10-23 20:01:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-23 20:01:25,376 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:25,377 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 20:01:25,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:25,578 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:25,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1840760445, now seen corresponding path program 2 times [2024-10-23 20:01:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345487657] [2024-10-23 20:01:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:25,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345487657] [2024-10-23 20:01:25,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345487657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:25,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297394922] [2024-10-23 20:01:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:01:25,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:25,770 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) [2024-10-23 20:01:25,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 20:01:25,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:01:25,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:25,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 20:01:25,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:25,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297394922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:26,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-23 20:01:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046135940] [2024-10-23 20:01:26,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:26,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 20:01:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 20:01:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2024-10-23 20:01:26,067 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:26,182 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2024-10-23 20:01:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 20:01:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-23 20:01:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:26,184 INFO L225 Difference]: With dead ends: 80 [2024-10-23 20:01:26,184 INFO L226 Difference]: Without dead ends: 74 [2024-10-23 20:01:26,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2024-10-23 20:01:26,185 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:26,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 50 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-23 20:01:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 32. [2024-10-23 20:01:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-23 20:01:26,189 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2024-10-23 20:01:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:26,190 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-23 20:01:26,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-23 20:01:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-23 20:01:26,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:26,191 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:26,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 20:01:26,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:26,395 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:26,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:26,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1278627842, now seen corresponding path program 2 times [2024-10-23 20:01:26,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:26,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608042040] [2024-10-23 20:01:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:26,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608042040] [2024-10-23 20:01:26,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608042040] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:26,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215746716] [2024-10-23 20:01:26,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:01:26,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:26,679 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) [2024-10-23 20:01:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 20:01:26,735 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:01:26,736 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:26,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-23 20:01:26,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:26,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:26,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:26,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:27,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-23 20:01:27,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-23 20:01:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215746716] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:27,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:27,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-23 20:01:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003244646] [2024-10-23 20:01:27,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:27,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-23 20:01:27,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-23 20:01:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-10-23 20:01:27,294 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:27,435 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-10-23 20:01:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:01:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-23 20:01:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:27,438 INFO L225 Difference]: With dead ends: 43 [2024-10-23 20:01:27,438 INFO L226 Difference]: Without dead ends: 41 [2024-10-23 20:01:27,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-10-23 20:01:27,439 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:27,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-23 20:01:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2024-10-23 20:01:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-10-23 20:01:27,453 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 17 [2024-10-23 20:01:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:27,453 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-10-23 20:01:27,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-10-23 20:01:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-23 20:01:27,453 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:27,454 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:27,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:27,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:27,655 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:27,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1956042473, now seen corresponding path program 3 times [2024-10-23 20:01:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:27,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057958899] [2024-10-23 20:01:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:28,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057958899] [2024-10-23 20:01:28,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057958899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:28,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749037246] [2024-10-23 20:01:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:01:28,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:28,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:28,073 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) [2024-10-23 20:01:28,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 20:01:28,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-23 20:01:28,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:28,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-23 20:01:28,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:28,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:01:28,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:01:28,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:28,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:28,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:28,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:01:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:28,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749037246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:28,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:28,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-10-23 20:01:28,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361097943] [2024-10-23 20:01:28,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:28,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-23 20:01:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-23 20:01:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2024-10-23 20:01:28,794 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:28,949 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-10-23 20:01:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:01:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-23 20:01:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:28,950 INFO L225 Difference]: With dead ends: 40 [2024-10-23 20:01:28,950 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 20:01:28,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2024-10-23 20:01:28,951 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:28,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 20:01:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-10-23 20:01:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-10-23 20:01:28,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2024-10-23 20:01:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:28,958 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-10-23 20:01:28,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-10-23 20:01:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-23 20:01:28,958 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:28,959 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:28,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:29,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:29,164 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:29,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -457694673, now seen corresponding path program 1 times [2024-10-23 20:01:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187410524] [2024-10-23 20:01:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187410524] [2024-10-23 20:01:29,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187410524] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826540731] [2024-10-23 20:01:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:29,272 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) [2024-10-23 20:01:29,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 20:01:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:29,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-23 20:01:29,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:29,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:29,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826540731] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:29,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:29,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-10-23 20:01:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647073376] [2024-10-23 20:01:29,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:29,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 20:01:29,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 20:01:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-10-23 20:01:29,423 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:29,456 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-10-23 20:01:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:01:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-23 20:01:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:29,457 INFO L225 Difference]: With dead ends: 44 [2024-10-23 20:01:29,459 INFO L226 Difference]: Without dead ends: 34 [2024-10-23 20:01:29,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-10-23 20:01:29,459 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:29,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:01:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-23 20:01:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-23 20:01:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-23 20:01:29,467 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2024-10-23 20:01:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:29,467 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-23 20:01:29,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-23 20:01:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-23 20:01:29,467 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:29,468 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:29,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 20:01:29,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:29,673 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:29,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1649746456, now seen corresponding path program 2 times [2024-10-23 20:01:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560575794] [2024-10-23 20:01:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:29,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560575794] [2024-10-23 20:01:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560575794] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166368637] [2024-10-23 20:01:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:01:29,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:29,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:29,970 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) [2024-10-23 20:01:29,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 20:01:30,023 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:01:30,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:30,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-23 20:01:30,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:30,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:30,311 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:30,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:30,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:30,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:30,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:30,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166368637] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:30,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:30,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-10-23 20:01:30,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919737564] [2024-10-23 20:01:30,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:30,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-23 20:01:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-23 20:01:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2024-10-23 20:01:30,672 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:30,799 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2024-10-23 20:01:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 20:01:30,800 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-23 20:01:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:30,800 INFO L225 Difference]: With dead ends: 43 [2024-10-23 20:01:30,800 INFO L226 Difference]: Without dead ends: 34 [2024-10-23 20:01:30,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2024-10-23 20:01:30,801 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:30,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-23 20:01:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-23 20:01:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-10-23 20:01:30,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2024-10-23 20:01:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:30,807 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-10-23 20:01:30,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-10-23 20:01:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-23 20:01:30,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:30,808 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:01:30,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 20:01:31,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:31,013 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:31,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash -455241887, now seen corresponding path program 3 times [2024-10-23 20:01:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672560197] [2024-10-23 20:01:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672560197] [2024-10-23 20:01:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672560197] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:31,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905269622] [2024-10-23 20:01:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:01:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:31,314 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) [2024-10-23 20:01:31,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 20:01:31,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-23 20:01:31,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:31,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-23 20:01:31,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:31,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-23 20:01:31,465 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-23 20:01:31,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-23 20:01:31,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-10-23 20:01:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:31,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:31,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:31,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:01:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905269622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:31,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-10-23 20:01:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671132934] [2024-10-23 20:01:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:31,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-23 20:01:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-23 20:01:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2024-10-23 20:01:31,759 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:31,943 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-10-23 20:01:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 20:01:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-23 20:01:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:31,944 INFO L225 Difference]: With dead ends: 40 [2024-10-23 20:01:31,944 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 20:01:31,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-10-23 20:01:31,945 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:31,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 61 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 20:01:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-10-23 20:01:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-23 20:01:31,951 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2024-10-23 20:01:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:31,951 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-23 20:01:31,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-23 20:01:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-23 20:01:31,952 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:31,952 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 3, 2, 2, 1, 1, 1, 1, 1] [2024-10-23 20:01:31,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 20:01:32,152 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,SelfDestructingSolverStorable10 [2024-10-23 20:01:32,152 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:32,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1400877680, now seen corresponding path program 4 times [2024-10-23 20:01:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:32,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14008655] [2024-10-23 20:01:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14008655] [2024-10-23 20:01:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14008655] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006729627] [2024-10-23 20:01:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 20:01:32,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:32,499 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) [2024-10-23 20:01:32,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 20:01:32,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 20:01:32,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:32,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-23 20:01:32,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:32,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:32,881 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:32,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:32,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:33,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:33,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:33,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006729627] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:33,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:33,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2024-10-23 20:01:33,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254898711] [2024-10-23 20:01:33,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:33,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-23 20:01:33,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-23 20:01:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2024-10-23 20:01:33,329 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:33,538 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2024-10-23 20:01:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 20:01:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-23 20:01:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:33,539 INFO L225 Difference]: With dead ends: 49 [2024-10-23 20:01:33,539 INFO L226 Difference]: Without dead ends: 37 [2024-10-23 20:01:33,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-10-23 20:01:33,540 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:33,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:01:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-23 20:01:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-23 20:01:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-10-23 20:01:33,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2024-10-23 20:01:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:33,544 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-10-23 20:01:33,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-10-23 20:01:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-23 20:01:33,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:33,545 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 3, 2, 2, 1, 1, 1, 1, 1] [2024-10-23 20:01:33,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-23 20:01:33,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:33,746 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:33,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1815214953, now seen corresponding path program 5 times [2024-10-23 20:01:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444317000] [2024-10-23 20:01:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:34,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:34,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444317000] [2024-10-23 20:01:34,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444317000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:34,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937284033] [2024-10-23 20:01:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 20:01:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:34,060 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) [2024-10-23 20:01:34,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 20:01:34,138 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-10-23 20:01:34,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:34,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-23 20:01:34,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:34,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:01:34,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:01:34,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:34,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:34,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:34,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:01:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937284033] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:34,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:34,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2024-10-23 20:01:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126037222] [2024-10-23 20:01:34,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:34,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-23 20:01:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-23 20:01:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2024-10-23 20:01:34,821 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:35,157 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-10-23 20:01:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 20:01:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-23 20:01:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:35,158 INFO L225 Difference]: With dead ends: 43 [2024-10-23 20:01:35,158 INFO L226 Difference]: Without dead ends: 41 [2024-10-23 20:01:35,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2024-10-23 20:01:35,159 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:35,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 107 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:01:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-23 20:01:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-10-23 20:01:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-10-23 20:01:35,163 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2024-10-23 20:01:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:35,164 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-10-23 20:01:35,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-10-23 20:01:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-23 20:01:35,164 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:35,165 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2024-10-23 20:01:35,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:35,368 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,SelfDestructingSolverStorable12 [2024-10-23 20:01:35,369 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:35,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash 869771642, now seen corresponding path program 6 times [2024-10-23 20:01:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109571959] [2024-10-23 20:01:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:35,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109571959] [2024-10-23 20:01:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109571959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:35,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522936778] [2024-10-23 20:01:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 20:01:35,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:35,686 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) [2024-10-23 20:01:35,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 20:01:35,764 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-23 20:01:35,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:35,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-23 20:01:35,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:35,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:36,191 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:36,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:36,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:36,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:36,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522936778] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:36,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:36,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2024-10-23 20:01:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017656704] [2024-10-23 20:01:36,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:36,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-23 20:01:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-23 20:01:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2024-10-23 20:01:36,765 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:37,034 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2024-10-23 20:01:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 20:01:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-23 20:01:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:37,035 INFO L225 Difference]: With dead ends: 55 [2024-10-23 20:01:37,035 INFO L226 Difference]: Without dead ends: 40 [2024-10-23 20:01:37,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2024-10-23 20:01:37,036 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:37,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:01:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-23 20:01:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-23 20:01:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-23 20:01:37,040 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-10-23 20:01:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:37,040 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-23 20:01:37,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-23 20:01:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-23 20:01:37,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:37,041 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2024-10-23 20:01:37,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-23 20:01:37,245 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,SelfDestructingSolverStorable13 [2024-10-23 20:01:37,245 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:37,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash 607754163, now seen corresponding path program 7 times [2024-10-23 20:01:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:37,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245131106] [2024-10-23 20:01:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:37,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245131106] [2024-10-23 20:01:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245131106] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102603433] [2024-10-23 20:01:37,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 20:01:37,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:37,576 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) [2024-10-23 20:01:37,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 20:01:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:37,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-23 20:01:37,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:37,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:01:37,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:01:38,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:38,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:38,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:38,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2024-10-23 20:01:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102603433] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:38,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:38,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2024-10-23 20:01:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193911795] [2024-10-23 20:01:38,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:38,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-23 20:01:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-23 20:01:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2024-10-23 20:01:38,569 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:39,016 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2024-10-23 20:01:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 20:01:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-23 20:01:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:39,017 INFO L225 Difference]: With dead ends: 46 [2024-10-23 20:01:39,017 INFO L226 Difference]: Without dead ends: 44 [2024-10-23 20:01:39,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2024-10-23 20:01:39,018 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:39,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 20:01:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-23 20:01:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-10-23 20:01:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-10-23 20:01:39,022 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2024-10-23 20:01:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:39,023 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-10-23 20:01:39,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-10-23 20:01:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-23 20:01:39,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:39,024 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 5, 4, 4, 1, 1, 1, 1, 1] [2024-10-23 20:01:39,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:39,227 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,SelfDestructingSolverStorable14 [2024-10-23 20:01:39,228 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:39,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1972637474, now seen corresponding path program 8 times [2024-10-23 20:01:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061304895] [2024-10-23 20:01:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061304895] [2024-10-23 20:01:39,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061304895] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007781876] [2024-10-23 20:01:39,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:01:39,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:39,737 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) [2024-10-23 20:01:39,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 20:01:39,813 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:01:39,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:39,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-23 20:01:39,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:40,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:40,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:40,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:40,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-23 20:01:40,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-23 20:01:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007781876] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:40,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:40,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-10-23 20:01:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672207291] [2024-10-23 20:01:40,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:40,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-23 20:01:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-23 20:01:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2024-10-23 20:01:40,884 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:41,531 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-10-23 20:01:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-23 20:01:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-23 20:01:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:41,532 INFO L225 Difference]: With dead ends: 64 [2024-10-23 20:01:41,532 INFO L226 Difference]: Without dead ends: 43 [2024-10-23 20:01:41,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=3249, Unknown=0, NotChecked=0, Total=3540 [2024-10-23 20:01:41,533 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:41,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 252 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 20:01:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-23 20:01:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-23 20:01:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-10-23 20:01:41,541 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2024-10-23 20:01:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:41,541 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-10-23 20:01:41,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-10-23 20:01:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 20:01:41,542 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:41,546 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 5, 4, 4, 1, 1, 1, 1, 1] [2024-10-23 20:01:41,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-23 20:01:41,746 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,SelfDestructingSolverStorable15 [2024-10-23 20:01:41,747 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:41,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 827522629, now seen corresponding path program 9 times [2024-10-23 20:01:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033820158] [2024-10-23 20:01:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033820158] [2024-10-23 20:01:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033820158] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176656643] [2024-10-23 20:01:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:01:42,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:42,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:42,145 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) [2024-10-23 20:01:42,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 20:01:42,294 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-23 20:01:42,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:42,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-23 20:01:42,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:42,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-23 20:01:42,402 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-23 20:01:42,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-23 20:01:42,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-10-23 20:01:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:42,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:42,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:42,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:01:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:42,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176656643] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:42,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-10-23 20:01:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066057159] [2024-10-23 20:01:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:42,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-23 20:01:42,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-23 20:01:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2024-10-23 20:01:42,996 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:43,386 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2024-10-23 20:01:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-23 20:01:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-23 20:01:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:43,387 INFO L225 Difference]: With dead ends: 49 [2024-10-23 20:01:43,387 INFO L226 Difference]: Without dead ends: 47 [2024-10-23 20:01:43,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2024-10-23 20:01:43,388 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:43,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 180 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 20:01:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-23 20:01:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-23 20:01:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-10-23 20:01:43,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2024-10-23 20:01:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:43,397 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-10-23 20:01:43,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-10-23 20:01:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-23 20:01:43,400 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:43,400 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 6, 5, 5, 1, 1, 1, 1, 1] [2024-10-23 20:01:43,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:43,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:43,601 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:43,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -380425972, now seen corresponding path program 10 times [2024-10-23 20:01:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336401836] [2024-10-23 20:01:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:44,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:44,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336401836] [2024-10-23 20:01:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336401836] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:44,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427249037] [2024-10-23 20:01:44,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 20:01:44,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:44,066 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) [2024-10-23 20:01:44,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 20:01:44,226 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 20:01:44,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:44,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-23 20:01:44,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:44,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:44,805 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:44,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:44,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:45,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:45,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427249037] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:45,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2024-10-23 20:01:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766399044] [2024-10-23 20:01:45,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:45,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-23 20:01:45,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-23 20:01:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-10-23 20:01:45,551 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:45,838 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2024-10-23 20:01:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-23 20:01:45,839 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-23 20:01:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:45,839 INFO L225 Difference]: With dead ends: 67 [2024-10-23 20:01:45,839 INFO L226 Difference]: Without dead ends: 46 [2024-10-23 20:01:45,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=466, Invalid=2504, Unknown=0, NotChecked=0, Total=2970 [2024-10-23 20:01:45,840 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:45,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:01:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-23 20:01:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-23 20:01:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2024-10-23 20:01:45,846 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2024-10-23 20:01:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:45,847 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2024-10-23 20:01:45,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2024-10-23 20:01:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-23 20:01:45,850 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:45,850 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 5, 5, 1, 1, 1, 1, 1] [2024-10-23 20:01:45,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-23 20:01:46,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-23 20:01:46,055 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:46,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1502569477, now seen corresponding path program 11 times [2024-10-23 20:01:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:46,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593917859] [2024-10-23 20:01:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:46,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593917859] [2024-10-23 20:01:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593917859] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071750971] [2024-10-23 20:01:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 20:01:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:46,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:46,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-23 20:01:46,645 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-10-23 20:01:46,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:46,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-23 20:01:46,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:46,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:01:46,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:01:47,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:47,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:47,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:47,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2024-10-23 20:01:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071750971] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:47,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2024-10-23 20:01:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264162413] [2024-10-23 20:01:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:47,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-23 20:01:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-23 20:01:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3115, Unknown=0, NotChecked=0, Total=3306 [2024-10-23 20:01:47,816 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:48,453 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-10-23 20:01:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-23 20:01:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-23 20:01:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:48,454 INFO L225 Difference]: With dead ends: 52 [2024-10-23 20:01:48,454 INFO L226 Difference]: Without dead ends: 50 [2024-10-23 20:01:48,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=4014, Unknown=0, NotChecked=0, Total=4290 [2024-10-23 20:01:48,456 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:48,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 293 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 20:01:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-23 20:01:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-10-23 20:01:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-10-23 20:01:48,460 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2024-10-23 20:01:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:48,460 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-10-23 20:01:48,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-10-23 20:01:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-23 20:01:48,461 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:48,461 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 7, 6, 6, 1, 1, 1, 1, 1] [2024-10-23 20:01:48,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-23 20:01:48,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:48,666 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:48,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 903342924, now seen corresponding path program 12 times [2024-10-23 20:01:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374964258] [2024-10-23 20:01:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:48,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:49,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:49,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374964258] [2024-10-23 20:01:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374964258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:49,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088914471] [2024-10-23 20:01:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 20:01:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:49,202 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-23 20:01:49,400 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-10-23 20:01:49,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:49,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-23 20:01:49,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:49,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:50,127 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:50,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 51 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:50,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:50,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:50,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:51,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088914471] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:51,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:51,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 61 [2024-10-23 20:01:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560310616] [2024-10-23 20:01:51,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:51,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-23 20:01:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-23 20:01:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3221, Unknown=0, NotChecked=0, Total=3782 [2024-10-23 20:01:51,090 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:51,427 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2024-10-23 20:01:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-23 20:01:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-23 20:01:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:51,428 INFO L225 Difference]: With dead ends: 74 [2024-10-23 20:01:51,428 INFO L226 Difference]: Without dead ends: 50 [2024-10-23 20:01:51,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=591, Invalid=3315, Unknown=0, NotChecked=0, Total=3906 [2024-10-23 20:01:51,430 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:51,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 100 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 20:01:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-23 20:01:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-23 20:01:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-10-23 20:01:51,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2024-10-23 20:01:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:51,434 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-10-23 20:01:51,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-10-23 20:01:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-23 20:01:51,435 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:51,435 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 7, 6, 6, 1, 1, 1, 1, 1] [2024-10-23 20:01:51,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-23 20:01:51,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:51,640 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:51,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -306460436, now seen corresponding path program 1 times [2024-10-23 20:01:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:51,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090931678] [2024-10-23 20:01:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-23 20:01:51,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:51,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090931678] [2024-10-23 20:01:51,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090931678] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:51,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158610302] [2024-10-23 20:01:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:51,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:51,796 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:51,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-23 20:01:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:51,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 20:01:51,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-23 20:01:52,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-23 20:01:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158610302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:52,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:52,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-10-23 20:01:52,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139825573] [2024-10-23 20:01:52,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:52,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-23 20:01:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-23 20:01:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=886, Unknown=0, NotChecked=0, Total=1640 [2024-10-23 20:01:52,261 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:52,382 INFO L93 Difference]: Finished difference Result 422 states and 451 transitions. [2024-10-23 20:01:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-23 20:01:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-23 20:01:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:52,383 INFO L225 Difference]: With dead ends: 422 [2024-10-23 20:01:52,383 INFO L226 Difference]: Without dead ends: 399 [2024-10-23 20:01:52,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=886, Unknown=0, NotChecked=0, Total=1640 [2024-10-23 20:01:52,385 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:52,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 95 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:01:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-10-23 20:01:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 77. [2024-10-23 20:01:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-10-23 20:01:52,398 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 48 [2024-10-23 20:01:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:52,398 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-10-23 20:01:52,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-10-23 20:01:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-23 20:01:52,399 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:52,399 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 7, 6, 6, 1, 1, 1, 1, 1] [2024-10-23 20:01:52,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-23 20:01:52,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:52,600 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:52,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 756458483, now seen corresponding path program 13 times [2024-10-23 20:01:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096571180] [2024-10-23 20:01:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:53,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096571180] [2024-10-23 20:01:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096571180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:53,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603955441] [2024-10-23 20:01:53,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 20:01:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:53,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:53,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-23 20:01:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:53,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-23 20:01:53,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:53,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:01:53,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:01:53,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:01:53,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:01:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:53,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:54,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:01:54,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:01:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:54,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603955441] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:54,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:54,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2024-10-23 20:01:54,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82320872] [2024-10-23 20:01:54,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:54,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-23 20:01:54,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-23 20:01:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3820, Unknown=0, NotChecked=0, Total=4032 [2024-10-23 20:01:54,607 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 64 states, 64 states have (on average 2.25) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:55,298 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-10-23 20:01:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-23 20:01:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-23 20:01:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:55,299 INFO L225 Difference]: With dead ends: 83 [2024-10-23 20:01:55,299 INFO L226 Difference]: Without dead ends: 81 [2024-10-23 20:01:55,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=4948, Unknown=0, NotChecked=0, Total=5256 [2024-10-23 20:01:55,300 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:55,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 304 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 20:01:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-23 20:01:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-10-23 20:01:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2024-10-23 20:01:55,311 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 49 [2024-10-23 20:01:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:55,311 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2024-10-23 20:01:55,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2024-10-23 20:01:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-23 20:01:55,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:55,312 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 8, 7, 7, 1, 1, 1, 1, 1] [2024-10-23 20:01:55,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-23 20:01:55,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:55,516 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:55,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -33522530, now seen corresponding path program 14 times [2024-10-23 20:01:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775981333] [2024-10-23 20:01:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:56,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775981333] [2024-10-23 20:01:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775981333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493440327] [2024-10-23 20:01:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:01:56,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:56,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:56,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-23 20:01:56,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:01:56,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:56,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-23 20:01:56,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:56,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:01:56,990 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:01:56,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:01:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 70 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:57,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:01:57,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:01:57,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:01:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493440327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:01:58,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:01:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 65 [2024-10-23 20:01:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725037743] [2024-10-23 20:01:58,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:01:58,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-23 20:01:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:01:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-23 20:01:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=3660, Unknown=0, NotChecked=0, Total=4290 [2024-10-23 20:01:58,082 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 66 states, 66 states have (on average 2.303030303030303) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:01:58,437 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2024-10-23 20:01:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-23 20:01:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.303030303030303) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-23 20:01:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:01:58,438 INFO L225 Difference]: With dead ends: 107 [2024-10-23 20:01:58,438 INFO L226 Difference]: Without dead ends: 80 [2024-10-23 20:01:58,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2024-10-23 20:01:58,439 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 20:01:58,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 20:01:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-23 20:01:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-10-23 20:01:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-10-23 20:01:58,449 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 52 [2024-10-23 20:01:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:01:58,449 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-10-23 20:01:58,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.303030303030303) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:01:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-10-23 20:01:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-23 20:01:58,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:01:58,450 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 8, 7, 7, 1, 1, 1, 1, 1] [2024-10-23 20:01:58,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-23 20:01:58,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-23 20:01:58,650 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:01:58,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:01:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash -164752297, now seen corresponding path program 15 times [2024-10-23 20:01:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:01:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223039067] [2024-10-23 20:01:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:01:58,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:01:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:01:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:59,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:01:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223039067] [2024-10-23 20:01:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223039067] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:01:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527872094] [2024-10-23 20:01:59,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:01:59,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:01:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:01:59,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:01:59,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-23 20:01:59,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-10-23 20:01:59,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:01:59,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-23 20:01:59,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:01:59,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-23 20:01:59,678 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-23 20:01:59,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-23 20:01:59,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-10-23 20:01:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:01:59,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:00,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:00,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:02:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:00,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527872094] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:00,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:00,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2024-10-23 20:02:00,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491288305] [2024-10-23 20:02:00,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:00,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-23 20:02:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-23 20:02:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2024-10-23 20:02:00,710 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 58 states, 58 states have (on average 2.3448275862068964) internal successors, (136), 57 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:01,470 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-10-23 20:02:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-23 20:02:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3448275862068964) internal successors, (136), 57 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-23 20:02:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:01,472 INFO L225 Difference]: With dead ends: 86 [2024-10-23 20:02:01,472 INFO L226 Difference]: Without dead ends: 84 [2024-10-23 20:02:01,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=270, Invalid=4152, Unknown=0, NotChecked=0, Total=4422 [2024-10-23 20:02:01,473 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:01,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 351 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 20:02:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-23 20:02:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-10-23 20:02:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 82 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2024-10-23 20:02:01,483 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 54 [2024-10-23 20:02:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:01,484 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2024-10-23 20:02:01,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3448275862068964) internal successors, (136), 57 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2024-10-23 20:02:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-23 20:02:01,484 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:01,484 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 9, 8, 8, 1, 1, 1, 1, 1] [2024-10-23 20:02:01,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:01,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-23 20:02:01,685 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:01,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:01,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1017151930, now seen corresponding path program 16 times [2024-10-23 20:02:01,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:01,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825819073] [2024-10-23 20:02:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 84 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:02,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825819073] [2024-10-23 20:02:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825819073] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305562485] [2024-10-23 20:02:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 20:02:02,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:02,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:02,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:02,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-23 20:02:02,919 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 20:02:02,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:02,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-23 20:02:02,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:03,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:02:03,655 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:02:03,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:02:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 92 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:03,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:04,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:02:04,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:02:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 84 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:04,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305562485] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:04,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:04,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-10-23 20:02:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475177890] [2024-10-23 20:02:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:04,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-23 20:02:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-23 20:02:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2024-10-23 20:02:04,914 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 73 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 72 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:05,438 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2024-10-23 20:02:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 20:02:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 72 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-23 20:02:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:05,439 INFO L225 Difference]: With dead ends: 113 [2024-10-23 20:02:05,439 INFO L226 Difference]: Without dead ends: 83 [2024-10-23 20:02:05,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=778, Invalid=4772, Unknown=0, NotChecked=0, Total=5550 [2024-10-23 20:02:05,440 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:05,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 172 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-23 20:02:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-23 20:02:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-23 20:02:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2024-10-23 20:02:05,451 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 57 [2024-10-23 20:02:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:05,451 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2024-10-23 20:02:05,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 72 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2024-10-23 20:02:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-23 20:02:05,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:05,452 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 9, 8, 8, 1, 1, 1, 1, 1] [2024-10-23 20:02:05,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-23 20:02:05,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:05,657 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:05,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1074386337, now seen corresponding path program 17 times [2024-10-23 20:02:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:05,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237699032] [2024-10-23 20:02:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:05,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:06,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:06,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237699032] [2024-10-23 20:02:06,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237699032] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:06,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413803625] [2024-10-23 20:02:06,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 20:02:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:06,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:06,416 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-23 20:02:06,610 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-10-23 20:02:06,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:06,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-23 20:02:06,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:06,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:02:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:02:06,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:02:06,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:02:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:06,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:07,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:07,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2024-10-23 20:02:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413803625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:07,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:07,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 54 [2024-10-23 20:02:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4730101] [2024-10-23 20:02:07,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:07,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-23 20:02:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-23 20:02:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2809, Unknown=0, NotChecked=0, Total=2970 [2024-10-23 20:02:07,637 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:08,520 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2024-10-23 20:02:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 20:02:08,520 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-10-23 20:02:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:08,521 INFO L225 Difference]: With dead ends: 89 [2024-10-23 20:02:08,521 INFO L226 Difference]: Without dead ends: 87 [2024-10-23 20:02:08,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=256, Invalid=3904, Unknown=0, NotChecked=0, Total=4160 [2024-10-23 20:02:08,522 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:08,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 384 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-23 20:02:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-23 20:02:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-10-23 20:02:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-10-23 20:02:08,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 59 [2024-10-23 20:02:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:08,539 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-10-23 20:02:08,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-10-23 20:02:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-23 20:02:08,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:08,540 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 10, 9, 9, 1, 1, 1, 1, 1] [2024-10-23 20:02:08,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:08,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:08,745 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:08,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash 952288304, now seen corresponding path program 18 times [2024-10-23 20:02:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210235683] [2024-10-23 20:02:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 108 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:09,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:09,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210235683] [2024-10-23 20:02:09,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210235683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:09,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119540521] [2024-10-23 20:02:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 20:02:09,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:09,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:09,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-23 20:02:09,955 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-10-23 20:02:09,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:09,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-23 20:02:09,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:10,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:02:11,001 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:02:11,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:02:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 117 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:11,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:11,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:02:11,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:02:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 108 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119540521] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:12,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:12,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 77 [2024-10-23 20:02:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840094541] [2024-10-23 20:02:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:12,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-10-23 20:02:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-10-23 20:02:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=5151, Unknown=0, NotChecked=0, Total=6006 [2024-10-23 20:02:12,243 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 78 states, 78 states have (on average 2.3333333333333335) internal successors, (182), 77 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:12,683 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2024-10-23 20:02:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-23 20:02:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3333333333333335) internal successors, (182), 77 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-23 20:02:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:12,684 INFO L225 Difference]: With dead ends: 119 [2024-10-23 20:02:12,684 INFO L226 Difference]: Without dead ends: 86 [2024-10-23 20:02:12,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=892, Invalid=5270, Unknown=0, NotChecked=0, Total=6162 [2024-10-23 20:02:12,685 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:12,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-23 20:02:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-23 20:02:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-10-23 20:02:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2024-10-23 20:02:12,698 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 62 [2024-10-23 20:02:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:12,698 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2024-10-23 20:02:12,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3333333333333335) internal successors, (182), 77 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2024-10-23 20:02:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-23 20:02:12,702 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:12,702 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 10, 9, 9, 1, 1, 1, 1, 1] [2024-10-23 20:02:12,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:12,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-23 20:02:12,903 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:12,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 459589801, now seen corresponding path program 19 times [2024-10-23 20:02:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:12,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606163751] [2024-10-23 20:02:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:13,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606163751] [2024-10-23 20:02:13,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606163751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:13,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056235141] [2024-10-23 20:02:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 20:02:13,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:13,997 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:13,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-23 20:02:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:14,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-23 20:02:14,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:14,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:02:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:02:14,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:02:14,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:02:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:14,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:15,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:15,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:02:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056235141] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:15,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:15,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 81 [2024-10-23 20:02:15,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742866478] [2024-10-23 20:02:15,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:15,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-10-23 20:02:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-10-23 20:02:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=6367, Unknown=0, NotChecked=0, Total=6642 [2024-10-23 20:02:15,889 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:16,882 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-10-23 20:02:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-23 20:02:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-10-23 20:02:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:16,883 INFO L225 Difference]: With dead ends: 92 [2024-10-23 20:02:16,883 INFO L226 Difference]: Without dead ends: 90 [2024-10-23 20:02:16,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=404, Invalid=8338, Unknown=0, NotChecked=0, Total=8742 [2024-10-23 20:02:16,884 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:16,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 604 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-23 20:02:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-23 20:02:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-10-23 20:02:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2024-10-23 20:02:16,897 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 64 [2024-10-23 20:02:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:16,898 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2024-10-23 20:02:16,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2024-10-23 20:02:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-23 20:02:16,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:16,898 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 11, 10, 10, 1, 1, 1, 1, 1] [2024-10-23 20:02:16,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:17,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-23 20:02:17,103 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:17,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash -710765528, now seen corresponding path program 20 times [2024-10-23 20:02:17,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:17,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678096689] [2024-10-23 20:02:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678096689] [2024-10-23 20:02:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678096689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626476715] [2024-10-23 20:02:17,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:02:17,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:17,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:17,920 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-23 20:02:18,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:02:18,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:18,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-23 20:02:18,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:18,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:02:19,243 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:02:19,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:02:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 145 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:19,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:20,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:02:20,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:02:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:20,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626476715] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:20,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:20,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2024-10-23 20:02:20,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546023806] [2024-10-23 20:02:20,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:20,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-23 20:02:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-23 20:02:20,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2024-10-23 20:02:20,832 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 84 states, 84 states have (on average 2.3452380952380953) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:21,511 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2024-10-23 20:02:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-23 20:02:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.3452380952380953) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-23 20:02:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:21,512 INFO L225 Difference]: With dead ends: 125 [2024-10-23 20:02:21,512 INFO L226 Difference]: Without dead ends: 89 [2024-10-23 20:02:21,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1021, Invalid=6119, Unknown=0, NotChecked=0, Total=7140 [2024-10-23 20:02:21,513 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:21,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 272 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-23 20:02:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-23 20:02:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-10-23 20:02:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2024-10-23 20:02:21,526 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 67 [2024-10-23 20:02:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:21,527 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2024-10-23 20:02:21,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.3452380952380953) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2024-10-23 20:02:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-23 20:02:21,527 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:21,527 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 11, 10, 10, 1, 1, 1, 1, 1] [2024-10-23 20:02:21,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:21,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-23 20:02:21,732 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:21,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash -367168689, now seen corresponding path program 21 times [2024-10-23 20:02:21,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:21,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966797834] [2024-10-23 20:02:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:21,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966797834] [2024-10-23 20:02:22,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966797834] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757430170] [2024-10-23 20:02:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:02:22,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:22,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:22,498 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:22,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-23 20:02:23,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-10-23 20:02:23,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:23,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-23 20:02:23,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:23,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-23 20:02:23,277 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-23 20:02:23,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-23 20:02:23,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-10-23 20:02:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:23,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:24,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:24,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:02:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757430170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:24,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2024-10-23 20:02:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908751941] [2024-10-23 20:02:24,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:24,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-10-23 20:02:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-10-23 20:02:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=5312, Unknown=0, NotChecked=0, Total=5550 [2024-10-23 20:02:24,943 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:26,295 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-10-23 20:02:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-23 20:02:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-23 20:02:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:26,296 INFO L225 Difference]: With dead ends: 95 [2024-10-23 20:02:26,296 INFO L226 Difference]: Without dead ends: 93 [2024-10-23 20:02:26,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=375, Invalid=7281, Unknown=0, NotChecked=0, Total=7656 [2024-10-23 20:02:26,297 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:26,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 588 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-23 20:02:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-23 20:02:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-10-23 20:02:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-23 20:02:26,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 69 [2024-10-23 20:02:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:26,311 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-23 20:02:26,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-23 20:02:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-23 20:02:26,312 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:26,312 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 12, 11, 11, 1, 1, 1, 1, 1] [2024-10-23 20:02:26,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-23 20:02:26,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:26,517 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:26,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash 964501442, now seen corresponding path program 22 times [2024-10-23 20:02:26,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:26,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521805951] [2024-10-23 20:02:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 165 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521805951] [2024-10-23 20:02:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521805951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927399105] [2024-10-23 20:02:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 20:02:27,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:27,430 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:27,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-23 20:02:27,702 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 20:02:27,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:27,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-23 20:02:27,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:28,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:02:29,053 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:02:29,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:02:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 176 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:29,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:29,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:02:29,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:02:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 165 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:30,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927399105] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:30,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 89 [2024-10-23 20:02:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352344726] [2024-10-23 20:02:30,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:30,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-10-23 20:02:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-10-23 20:02:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6894, Unknown=0, NotChecked=0, Total=8010 [2024-10-23 20:02:30,754 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 90 states, 90 states have (on average 2.3555555555555556) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:31,397 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2024-10-23 20:02:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-23 20:02:31,398 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.3555555555555556) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-10-23 20:02:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:31,399 INFO L225 Difference]: With dead ends: 131 [2024-10-23 20:02:31,399 INFO L226 Difference]: Without dead ends: 92 [2024-10-23 20:02:31,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1159, Invalid=7031, Unknown=0, NotChecked=0, Total=8190 [2024-10-23 20:02:31,400 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:31,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 374 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-23 20:02:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-23 20:02:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-10-23 20:02:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-23 20:02:31,414 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 72 [2024-10-23 20:02:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:31,414 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-23 20:02:31,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.3555555555555556) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-23 20:02:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-23 20:02:31,415 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:31,415 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 12, 11, 11, 1, 1, 1, 1, 1] [2024-10-23 20:02:31,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-23 20:02:31,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:31,619 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:31,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:31,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1400725253, now seen corresponding path program 23 times [2024-10-23 20:02:31,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:31,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766226626] [2024-10-23 20:02:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:31,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:32,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:32,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766226626] [2024-10-23 20:02:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766226626] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:32,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251912363] [2024-10-23 20:02:32,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 20:02:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:32,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:32,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:32,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-23 20:02:32,884 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-10-23 20:02:32,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:32,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-23 20:02:32,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:33,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:02:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:02:33,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:02:33,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:02:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:33,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:34,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:34,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:02:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251912363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:35,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:35,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 93 [2024-10-23 20:02:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125125676] [2024-10-23 20:02:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:35,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-10-23 20:02:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-10-23 20:02:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=8425, Unknown=0, NotChecked=0, Total=8742 [2024-10-23 20:02:35,256 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 94 states, 94 states have (on average 2.3297872340425534) internal successors, (219), 93 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:36,965 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2024-10-23 20:02:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-23 20:02:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.3297872340425534) internal successors, (219), 93 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-10-23 20:02:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:36,966 INFO L225 Difference]: With dead ends: 98 [2024-10-23 20:02:36,966 INFO L226 Difference]: Without dead ends: 96 [2024-10-23 20:02:36,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=468, Invalid=11088, Unknown=0, NotChecked=0, Total=11556 [2024-10-23 20:02:36,967 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:36,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 845 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-23 20:02:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-23 20:02:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-10-23 20:02:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-23 20:02:36,983 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 74 [2024-10-23 20:02:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:36,984 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-23 20:02:36,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.3297872340425534) internal successors, (219), 93 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-23 20:02:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-23 20:02:36,984 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:36,985 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 13, 12, 12, 1, 1, 1, 1, 1] [2024-10-23 20:02:36,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-23 20:02:37,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:37,189 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:37,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash 901448342, now seen corresponding path program 24 times [2024-10-23 20:02:37,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:37,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022626089] [2024-10-23 20:02:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:38,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:38,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022626089] [2024-10-23 20:02:38,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022626089] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:38,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636531338] [2024-10-23 20:02:38,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 20:02:38,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:38,055 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:38,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-23 20:02:38,655 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-10-23 20:02:38,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:38,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-23 20:02:38,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:38,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-23 20:02:39,797 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-23 20:02:39,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-23 20:02:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 207 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:39,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:40,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 20:02:40,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-10-23 20:02:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636531338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:41,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 83 [2024-10-23 20:02:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387637168] [2024-10-23 20:02:41,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:41,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-23 20:02:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-23 20:02:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=6168, Unknown=0, NotChecked=0, Total=6972 [2024-10-23 20:02:41,931 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 84 states, 84 states have (on average 2.369047619047619) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:43,541 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2024-10-23 20:02:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-23 20:02:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.369047619047619) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-10-23 20:02:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:43,542 INFO L225 Difference]: With dead ends: 138 [2024-10-23 20:02:43,543 INFO L226 Difference]: Without dead ends: 95 [2024-10-23 20:02:43,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1284, Invalid=9428, Unknown=0, NotChecked=0, Total=10712 [2024-10-23 20:02:43,544 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:43,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 388 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-23 20:02:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-23 20:02:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-10-23 20:02:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2024-10-23 20:02:43,562 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 77 [2024-10-23 20:02:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:43,562 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2024-10-23 20:02:43,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.369047619047619) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2024-10-23 20:02:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-23 20:02:43,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:43,564 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 13, 12, 12, 1, 1, 1, 1, 1] [2024-10-23 20:02:43,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:43,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-23 20:02:43,765 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:43,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1614961917, now seen corresponding path program 25 times [2024-10-23 20:02:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520293044] [2024-10-23 20:02:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:44,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520293044] [2024-10-23 20:02:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520293044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535106208] [2024-10-23 20:02:44,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 20:02:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:44,725 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-23 20:02:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:44,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-23 20:02:44,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:45,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:02:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 20:02:45,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-23 20:02:46,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:02:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:46,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:47,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-23 20:02:47,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-23 20:02:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535106208] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:48,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:48,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 99 [2024-10-23 20:02:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909627059] [2024-10-23 20:02:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:48,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-10-23 20:02:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-10-23 20:02:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=9562, Unknown=0, NotChecked=0, Total=9900 [2024-10-23 20:02:48,057 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 100 states, 100 states have (on average 2.34) internal successors, (234), 99 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:49,810 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2024-10-23 20:02:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-23 20:02:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.34) internal successors, (234), 99 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-10-23 20:02:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:49,811 INFO L225 Difference]: With dead ends: 101 [2024-10-23 20:02:49,812 INFO L226 Difference]: Without dead ends: 99 [2024-10-23 20:02:49,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=500, Invalid=12610, Unknown=0, NotChecked=0, Total=13110 [2024-10-23 20:02:49,817 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 3576 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:49,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 838 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3576 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-23 20:02:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-23 20:02:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2024-10-23 20:02:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2024-10-23 20:02:49,853 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 79 [2024-10-23 20:02:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:49,853 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2024-10-23 20:02:49,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.34) internal successors, (234), 99 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2024-10-23 20:02:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-23 20:02:49,853 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:49,854 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 14, 13, 13, 1, 1, 1, 1, 1] [2024-10-23 20:02:49,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-23 20:02:50,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:50,054 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:50,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash -887967916, now seen corresponding path program 26 times [2024-10-23 20:02:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321981423] [2024-10-23 20:02:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321981423] [2024-10-23 20:02:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321981423] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:51,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277753327] [2024-10-23 20:02:51,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 20:02:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:51,197 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:51,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-23 20:02:51,381 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 20:02:51,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:51,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-10-23 20:02:51,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:02:51,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 20:02:52,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-23 20:02:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:52,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:02:53,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-23 20:02:53,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-23 20:02:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277753327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:02:54,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:02:54,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 102 [2024-10-23 20:02:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138786314] [2024-10-23 20:02:54,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:02:54,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-10-23 20:02:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:02:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-10-23 20:02:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=10162, Unknown=0, NotChecked=0, Total=10506 [2024-10-23 20:02:54,126 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 102 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:02:55,374 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2024-10-23 20:02:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-23 20:02:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 102 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-10-23 20:02:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:02:55,375 INFO L225 Difference]: With dead ends: 148 [2024-10-23 20:02:55,376 INFO L226 Difference]: Without dead ends: 146 [2024-10-23 20:02:55,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=359, Invalid=10561, Unknown=0, NotChecked=0, Total=10920 [2024-10-23 20:02:55,376 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:02:55,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1126 Invalid, 4027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-23 20:02:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-23 20:02:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2024-10-23 20:02:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2024-10-23 20:02:55,399 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 82 [2024-10-23 20:02:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:02:55,399 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2024-10-23 20:02:55,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 102 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 20:02:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2024-10-23 20:02:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-10-23 20:02:55,400 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:02:55,400 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 14, 13, 13, 1, 1, 1, 1, 1] [2024-10-23 20:02:55,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-23 20:02:55,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:55,605 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:02:55,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:02:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1624685901, now seen corresponding path program 27 times [2024-10-23 20:02:55,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:02:55,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40055142] [2024-10-23 20:02:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:02:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:02:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:02:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 20:02:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:02:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40055142] [2024-10-23 20:02:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40055142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:02:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309228587] [2024-10-23 20:02:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 20:02:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:02:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:02:56,544 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:02:56,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-23 20:02:57,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-10-23 20:02:57,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 20:02:57,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-23 20:02:57,826 INFO L278 TraceCheckSpWp]: Computing forward predicates...