./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 01:48:22,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 01:48:22,867 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 01:48:22,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 01:48:22,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 01:48:22,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 01:48:22,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 01:48:22,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 01:48:22,888 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 01:48:22,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 01:48:22,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 01:48:22,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 01:48:22,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 01:48:22,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 01:48:22,891 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 01:48:22,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 01:48:22,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 01:48:22,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 01:48:22,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 01:48:22,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 01:48:22,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 01:48:22,893 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 01:48:22,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 01:48:22,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 01:48:22,894 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 01:48:22,894 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 01:48:22,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 01:48:22,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 01:48:22,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 01:48:22,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 01:48:22,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 01:48:22,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 01:48:22,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:48:22,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 01:48:22,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 01:48:22,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 01:48:22,901 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2024-10-11 01:48:23,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 01:48:23,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 01:48:23,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 01:48:23,123 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 01:48:23,124 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 01:48:23,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2024-10-11 01:48:24,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 01:48:24,539 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 01:48:24,539 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2024-10-11 01:48:24,545 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/869546e31/306bf2bbec3e4757947e1c969cd5e05e/FLAGf27bcc85c [2024-10-11 01:48:24,556 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/869546e31/306bf2bbec3e4757947e1c969cd5e05e [2024-10-11 01:48:24,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 01:48:24,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 01:48:24,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 01:48:24,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 01:48:24,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 01:48:24,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656af6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24, skipping insertion in model container [2024-10-11 01:48:24,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,587 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 01:48:24,741 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/loops/vogal-1.i[895,908] [2024-10-11 01:48:24,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:48:24,773 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 01:48:24,783 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/loops/vogal-1.i[895,908] [2024-10-11 01:48:24,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:48:24,815 INFO L204 MainTranslator]: Completed translation [2024-10-11 01:48:24,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24 WrapperNode [2024-10-11 01:48:24,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 01:48:24,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 01:48:24,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 01:48:24,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 01:48:24,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,857 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 129 [2024-10-11 01:48:24,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 01:48:24,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 01:48:24,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 01:48:24,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 01:48:24,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,888 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 6, 13]. 62 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 0, 11]. The 1 writes are split as follows [0, 1, 0]. [2024-10-11 01:48:24,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,891 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,895 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 01:48:24,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 01:48:24,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 01:48:24,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 01:48:24,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (1/1) ... [2024-10-11 01:48:24,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:48:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:24,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 01:48:24,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 01:48:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 01:48:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 01:48:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 01:48:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 01:48:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 01:48:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 01:48:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 01:48:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 01:48:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 01:48:24,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 01:48:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 01:48:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 01:48:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 01:48:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 01:48:25,058 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 01:48:25,060 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 01:48:25,230 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-10-11 01:48:25,230 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 01:48:25,259 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 01:48:25,259 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 01:48:25,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:48:25 BoogieIcfgContainer [2024-10-11 01:48:25,260 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 01:48:25,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 01:48:25,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 01:48:25,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 01:48:25,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:48:24" (1/3) ... [2024-10-11 01:48:25,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103e871d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:48:25, skipping insertion in model container [2024-10-11 01:48:25,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:24" (2/3) ... [2024-10-11 01:48:25,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103e871d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:48:25, skipping insertion in model container [2024-10-11 01:48:25,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:48:25" (3/3) ... [2024-10-11 01:48:25,268 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2024-10-11 01:48:25,281 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 01:48:25,281 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 01:48:25,335 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 01:48:25,340 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;@583e1bf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 01:48:25,341 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 01:48:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 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) [2024-10-11 01:48:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 01:48:25,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:25,351 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:25,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:25,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1993292477, now seen corresponding path program 1 times [2024-10-11 01:48:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:25,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987712744] [2024-10-11 01:48:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:25,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987712744] [2024-10-11 01:48:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987712744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:48:25,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:48:25,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:48:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957470710] [2024-10-11 01:48:25,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:25,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 01:48:25,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 01:48:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 01:48:25,543 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2024-10-11 01:48:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:25,568 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2024-10-11 01:48:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 01:48:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) Word has length 12 [2024-10-11 01:48:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:25,576 INFO L225 Difference]: With dead ends: 50 [2024-10-11 01:48:25,576 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 01:48:25,578 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 [2024-10-11 01:48:25,582 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:25,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 01:48:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 01:48:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2024-10-11 01:48:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-10-11 01:48:25,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2024-10-11 01:48:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:25,655 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-10-11 01:48:25,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2024-10-11 01:48:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-10-11 01:48:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 01:48:25,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:25,657 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:25,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 01:48:25,658 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:25,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:25,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1292082620, now seen corresponding path program 1 times [2024-10-11 01:48:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:25,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728061038] [2024-10-11 01:48:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:25,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728061038] [2024-10-11 01:48:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728061038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:48:25,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:48:25,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:48:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279143456] [2024-10-11 01:48:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:25,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 01:48:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 01:48:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:48:25,819 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:25,855 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-10-11 01:48:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 01:48:25,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 01:48:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:25,857 INFO L225 Difference]: With dead ends: 60 [2024-10-11 01:48:25,857 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 01:48:25,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:48:25,860 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:25,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 01:48:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2024-10-11 01:48:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 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) [2024-10-11 01:48:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-11 01:48:25,868 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2024-10-11 01:48:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:25,868 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-11 01:48:25,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:25,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-11 01:48:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 01:48:25,869 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:25,869 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:25,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 01:48:25,869 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:25,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2049006260, now seen corresponding path program 1 times [2024-10-11 01:48:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:25,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40495622] [2024-10-11 01:48:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40495622] [2024-10-11 01:48:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40495622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:26,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528956570] [2024-10-11 01:48:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:26,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:26,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:26,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:26,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 01:48:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:26,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 01:48:26,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:48:26,157 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:48:26,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528956570] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:48:26,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:48:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2024-10-11 01:48:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358797402] [2024-10-11 01:48:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:26,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 01:48:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 01:48:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:48:26,162 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:26,196 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2024-10-11 01:48:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 01:48:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 01:48:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:26,197 INFO L225 Difference]: With dead ends: 47 [2024-10-11 01:48:26,197 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 01:48:26,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:48:26,198 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:26,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 01:48:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-10-11 01:48:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 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) [2024-10-11 01:48:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2024-10-11 01:48:26,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2024-10-11 01:48:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:26,203 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2024-10-11 01:48:26,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2024-10-11 01:48:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 01:48:26,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:26,204 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:26,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 01:48:26,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:26,409 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:26,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1097083643, now seen corresponding path program 1 times [2024-10-11 01:48:26,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:26,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358763450] [2024-10-11 01:48:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:26,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:48:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358763450] [2024-10-11 01:48:26,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358763450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:26,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697036511] [2024-10-11 01:48:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:26,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:26,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 01:48:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:26,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 01:48:26,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:48:26,610 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:48:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697036511] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:48:26,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:48:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-10-11 01:48:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564355375] [2024-10-11 01:48:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:26,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:48:26,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:48:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 01:48:26,612 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2024-10-11 01:48:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:26,629 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2024-10-11 01:48:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 01:48:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) Word has length 21 [2024-10-11 01:48:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:26,629 INFO L225 Difference]: With dead ends: 68 [2024-10-11 01:48:26,629 INFO L226 Difference]: Without dead ends: 40 [2024-10-11 01:48:26,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 01:48:26,631 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:26,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-11 01:48:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-11 01:48:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 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) [2024-10-11 01:48:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2024-10-11 01:48:26,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 21 [2024-10-11 01:48:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:26,637 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2024-10-11 01:48:26,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2024-10-11 01:48:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2024-10-11 01:48:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 01:48:26,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:26,638 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:26,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 01:48:26,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:26,840 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:26,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1110837872, now seen corresponding path program 1 times [2024-10-11 01:48:26,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:26,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329105868] [2024-10-11 01:48:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 01:48:26,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:26,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329105868] [2024-10-11 01:48:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329105868] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:26,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760112538] [2024-10-11 01:48:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:26,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:26,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:26,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 01:48:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:27,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 01:48:27,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:48:27,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:27,303 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 01:48:27,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2024-10-11 01:48:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:48:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760112538] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:27,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 01:48:27,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2024-10-11 01:48:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584719460] [2024-10-11 01:48:27,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:27,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 01:48:27,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 01:48:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-11 01:48:27,322 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2024-10-11 01:48:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:27,455 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-10-11 01:48:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 01:48:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 [2024-10-11 01:48:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:27,459 INFO L225 Difference]: With dead ends: 59 [2024-10-11 01:48:27,459 INFO L226 Difference]: Without dead ends: 38 [2024-10-11 01:48:27,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-10-11 01:48:27,464 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:27,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 101 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:48:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-11 01:48:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-11 01:48:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 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) [2024-10-11 01:48:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2024-10-11 01:48:27,470 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 22 [2024-10-11 01:48:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:27,470 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2024-10-11 01:48:27,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2024-10-11 01:48:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2024-10-11 01:48:27,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 01:48:27,471 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:27,471 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:27,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 01:48:27,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:27,672 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:27,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2036955776, now seen corresponding path program 1 times [2024-10-11 01:48:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:27,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163704512] [2024-10-11 01:48:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 01:48:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163704512] [2024-10-11 01:48:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163704512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392071663] [2024-10-11 01:48:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:27,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 01:48:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:27,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 01:48:27,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:27,937 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 8 [2024-10-11 01:48:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:48:27,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:28,038 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 01:48:28,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-10-11 01:48:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 01:48:28,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392071663] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:28,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:28,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 7] total 15 [2024-10-11 01:48:28,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848646991] [2024-10-11 01:48:28,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:28,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 01:48:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 01:48:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-11 01:48:28,064 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2024-10-11 01:48:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:28,208 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2024-10-11 01:48:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 01:48:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-11 01:48:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:28,209 INFO L225 Difference]: With dead ends: 121 [2024-10-11 01:48:28,209 INFO L226 Difference]: Without dead ends: 86 [2024-10-11 01:48:28,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-10-11 01:48:28,210 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:28,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 145 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:48:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-11 01:48:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 41. [2024-10-11 01:48:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2024-10-11 01:48:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-10-11 01:48:28,216 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2024-10-11 01:48:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:28,216 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-10-11 01:48:28,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2024-10-11 01:48:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-10-11 01:48:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 01:48:28,217 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:28,217 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:28,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 01:48:28,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 01:48:28,422 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:28,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -96462821, now seen corresponding path program 1 times [2024-10-11 01:48:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570823010] [2024-10-11 01:48:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 01:48:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570823010] [2024-10-11 01:48:28,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570823010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689750928] [2024-10-11 01:48:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:28,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:28,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 01:48:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:28,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 01:48:28,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:48:28,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 01:48:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689750928] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:28,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2024-10-11 01:48:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818603876] [2024-10-11 01:48:28,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:28,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 01:48:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 01:48:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:48:28,609 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-10-11 01:48:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:28,793 INFO L93 Difference]: Finished difference Result 220 states and 323 transitions. [2024-10-11 01:48:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 01:48:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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 25 [2024-10-11 01:48:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:28,796 INFO L225 Difference]: With dead ends: 220 [2024-10-11 01:48:28,796 INFO L226 Difference]: Without dead ends: 183 [2024-10-11 01:48:28,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-11 01:48:28,797 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 135 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:28,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 135 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:48:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-10-11 01:48:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 58. [2024-10-11 01:48:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 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) [2024-10-11 01:48:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2024-10-11 01:48:28,806 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 25 [2024-10-11 01:48:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:28,807 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2024-10-11 01:48:28,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-10-11 01:48:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2024-10-11 01:48:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 01:48:28,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:28,808 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:28,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 01:48:29,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:29,009 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:29,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1114311239, now seen corresponding path program 2 times [2024-10-11 01:48:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:29,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984396467] [2024-10-11 01:48:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:29,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 01:48:29,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984396467] [2024-10-11 01:48:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984396467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146969648] [2024-10-11 01:48:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:48:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:29,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 01:48:29,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:48:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:29,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-11 01:48:29,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:29,200 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 [2024-10-11 01:48:29,210 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 [2024-10-11 01:48:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:48:29,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 01:48:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146969648] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:29,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:29,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 18] total 30 [2024-10-11 01:48:29,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577121976] [2024-10-11 01:48:29,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:29,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 01:48:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 01:48:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-10-11 01:48:29,988 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-10-11 01:48:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:32,165 INFO L93 Difference]: Finished difference Result 566 states and 755 transitions. [2024-10-11 01:48:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-11 01:48:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 [2024-10-11 01:48:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:32,168 INFO L225 Difference]: With dead ends: 566 [2024-10-11 01:48:32,168 INFO L226 Difference]: Without dead ends: 511 [2024-10-11 01:48:32,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=768, Invalid=3654, Unknown=0, NotChecked=0, Total=4422 [2024-10-11 01:48:32,170 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 1140 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:32,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 688 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 01:48:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-10-11 01:48:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 104. [2024-10-11 01:48:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 103 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) [2024-10-11 01:48:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2024-10-11 01:48:32,192 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 29 [2024-10-11 01:48:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:32,192 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2024-10-11 01:48:32,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-10-11 01:48:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2024-10-11 01:48:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 01:48:32,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:32,194 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:32,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 01:48:32,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 01:48:32,398 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:32,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1808793442, now seen corresponding path program 1 times [2024-10-11 01:48:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639899879] [2024-10-11 01:48:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-11 01:48:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639899879] [2024-10-11 01:48:32,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639899879] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050822507] [2024-10-11 01:48:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:32,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:32,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:32,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 01:48:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:32,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 01:48:32,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 01:48:32,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 01:48:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050822507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:32,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:32,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 19 [2024-10-11 01:48:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313406962] [2024-10-11 01:48:32,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:32,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 01:48:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 01:48:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-11 01:48:32,706 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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) [2024-10-11 01:48:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:34,815 INFO L93 Difference]: Finished difference Result 637 states and 872 transitions. [2024-10-11 01:48:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-10-11 01:48:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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 [2024-10-11 01:48:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:34,817 INFO L225 Difference]: With dead ends: 637 [2024-10-11 01:48:34,818 INFO L226 Difference]: Without dead ends: 539 [2024-10-11 01:48:34,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1741, Invalid=9601, Unknown=0, NotChecked=0, Total=11342 [2024-10-11 01:48:34,821 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 1402 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:34,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 634 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 01:48:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-10-11 01:48:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 109. [2024-10-11 01:48:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 108 states have internal predecessors, (141), 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) [2024-10-11 01:48:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2024-10-11 01:48:34,847 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 32 [2024-10-11 01:48:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:34,847 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2024-10-11 01:48:34,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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) [2024-10-11 01:48:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2024-10-11 01:48:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:34,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:34,848 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:34,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 01:48:35,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:35,048 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:35,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash -228316817, now seen corresponding path program 1 times [2024-10-11 01:48:35,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:35,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574848982] [2024-10-11 01:48:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574848982] [2024-10-11 01:48:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574848982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481815005] [2024-10-11 01:48:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:35,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:35,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:35,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 01:48:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:35,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 01:48:35,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 01:48:35,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481815005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:35,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:35,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2024-10-11 01:48:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882221734] [2024-10-11 01:48:35,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:35,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 01:48:35,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 01:48:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-10-11 01:48:35,743 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 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) [2024-10-11 01:48:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:36,514 INFO L93 Difference]: Finished difference Result 515 states and 693 transitions. [2024-10-11 01:48:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 01:48:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 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 40 [2024-10-11 01:48:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:36,517 INFO L225 Difference]: With dead ends: 515 [2024-10-11 01:48:36,518 INFO L226 Difference]: Without dead ends: 507 [2024-10-11 01:48:36,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 01:48:36,519 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 422 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:36,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1176 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 01:48:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-10-11 01:48:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 181. [2024-10-11 01:48:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3277777777777777) internal successors, (239), 180 states have internal predecessors, (239), 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) [2024-10-11 01:48:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2024-10-11 01:48:36,571 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 40 [2024-10-11 01:48:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:36,572 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2024-10-11 01:48:36,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 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) [2024-10-11 01:48:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2024-10-11 01:48:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:36,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:36,579 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:36,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 01:48:36,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 01:48:36,780 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:36,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 451741553, now seen corresponding path program 1 times [2024-10-11 01:48:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509040063] [2024-10-11 01:48:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 01:48:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509040063] [2024-10-11 01:48:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509040063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:37,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20206137] [2024-10-11 01:48:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:37,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:37,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:37,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 01:48:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:37,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-11 01:48:37,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:37,910 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 19 treesize of output 11 [2024-10-11 01:48:37,912 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 15 treesize of output 7 [2024-10-11 01:48:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 01:48:37,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:38,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:38,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 57 [2024-10-11 01:48:38,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:38,259 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 47 treesize of output 35 [2024-10-11 01:48:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20206137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:38,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:38,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 31 [2024-10-11 01:48:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046037754] [2024-10-11 01:48:38,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:38,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 01:48:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 01:48:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-10-11 01:48:38,416 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 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) [2024-10-11 01:48:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:41,809 INFO L93 Difference]: Finished difference Result 738 states and 1010 transitions. [2024-10-11 01:48:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-10-11 01:48:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 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 40 [2024-10-11 01:48:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:41,812 INFO L225 Difference]: With dead ends: 738 [2024-10-11 01:48:41,812 INFO L226 Difference]: Without dead ends: 592 [2024-10-11 01:48:41,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1492, Invalid=8408, Unknown=0, NotChecked=0, Total=9900 [2024-10-11 01:48:41,815 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 512 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:41,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 461 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 01:48:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2024-10-11 01:48:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 326. [2024-10-11 01:48:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.2892307692307692) internal successors, (419), 325 states have internal predecessors, (419), 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) [2024-10-11 01:48:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 419 transitions. [2024-10-11 01:48:41,903 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 419 transitions. Word has length 40 [2024-10-11 01:48:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:41,903 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 419 transitions. [2024-10-11 01:48:41,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 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) [2024-10-11 01:48:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 419 transitions. [2024-10-11 01:48:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:41,904 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:41,904 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:41,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 01:48:42,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:42,105 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:42,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 194385009, now seen corresponding path program 1 times [2024-10-11 01:48:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635708796] [2024-10-11 01:48:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:42,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 01:48:43,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635708796] [2024-10-11 01:48:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635708796] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560019378] [2024-10-11 01:48:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:43,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:43,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 01:48:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:43,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 01:48:43,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:43,494 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 20 treesize of output 12 [2024-10-11 01:48:43,495 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 8 [2024-10-11 01:48:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 01:48:43,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:43,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:43,782 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 26 treesize of output 22 [2024-10-11 01:48:43,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:43,931 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 16 treesize of output 3 [2024-10-11 01:48:43,937 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 01:48:43,937 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 15 treesize of output 9 [2024-10-11 01:48:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:43,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560019378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:43,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:43,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-11 01:48:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786551657] [2024-10-11 01:48:43,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:43,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 01:48:43,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 01:48:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 01:48:43,999 INFO L87 Difference]: Start difference. First operand 326 states and 419 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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) [2024-10-11 01:48:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:45,409 INFO L93 Difference]: Finished difference Result 566 states and 732 transitions. [2024-10-11 01:48:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 01:48:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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 40 [2024-10-11 01:48:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:45,413 INFO L225 Difference]: With dead ends: 566 [2024-10-11 01:48:45,413 INFO L226 Difference]: Without dead ends: 469 [2024-10-11 01:48:45,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=953, Invalid=4017, Unknown=0, NotChecked=0, Total=4970 [2024-10-11 01:48:45,415 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 394 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:45,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 255 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 01:48:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-10-11 01:48:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 351. [2024-10-11 01:48:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.262857142857143) internal successors, (442), 350 states have internal predecessors, (442), 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) [2024-10-11 01:48:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 442 transitions. [2024-10-11 01:48:45,509 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 442 transitions. Word has length 40 [2024-10-11 01:48:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:45,511 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 442 transitions. [2024-10-11 01:48:45,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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) [2024-10-11 01:48:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 442 transitions. [2024-10-11 01:48:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:45,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:45,511 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:45,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 01:48:45,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 01:48:45,712 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:45,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1132608817, now seen corresponding path program 1 times [2024-10-11 01:48:45,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:45,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225679828] [2024-10-11 01:48:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:45,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 01:48:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225679828] [2024-10-11 01:48:46,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225679828] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538800995] [2024-10-11 01:48:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:46,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:46,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 01:48:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:46,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 01:48:46,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:46,933 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 19 treesize of output 11 [2024-10-11 01:48:46,935 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 15 treesize of output 7 [2024-10-11 01:48:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 01:48:46,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:47,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:47,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 55 [2024-10-11 01:48:47,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:47,162 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 45 treesize of output 35 [2024-10-11 01:48:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 01:48:47,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538800995] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:47,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:47,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 32 [2024-10-11 01:48:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114442361] [2024-10-11 01:48:47,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:47,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 01:48:47,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 01:48:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2024-10-11 01:48:47,236 INFO L87 Difference]: Start difference. First operand 351 states and 442 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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) [2024-10-11 01:48:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:47,989 INFO L93 Difference]: Finished difference Result 596 states and 753 transitions. [2024-10-11 01:48:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 01:48:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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 40 [2024-10-11 01:48:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:47,991 INFO L225 Difference]: With dead ends: 596 [2024-10-11 01:48:47,991 INFO L226 Difference]: Without dead ends: 525 [2024-10-11 01:48:47,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=583, Invalid=2387, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 01:48:47,992 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 228 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:47,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 240 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 01:48:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-10-11 01:48:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 421. [2024-10-11 01:48:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.2619047619047619) internal successors, (530), 420 states have internal predecessors, (530), 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) [2024-10-11 01:48:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 530 transitions. [2024-10-11 01:48:48,108 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 530 transitions. Word has length 40 [2024-10-11 01:48:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:48,109 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 530 transitions. [2024-10-11 01:48:48,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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) [2024-10-11 01:48:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 530 transitions. [2024-10-11 01:48:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:48,110 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:48,110 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:48,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 01:48:48,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 01:48:48,311 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:48,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash -362330323, now seen corresponding path program 2 times [2024-10-11 01:48:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:48,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189500651] [2024-10-11 01:48:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-11 01:48:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189500651] [2024-10-11 01:48:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189500651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863396710] [2024-10-11 01:48:48,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:48:48,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:48,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:48,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 01:48:48,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:48:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:48,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 01:48:48,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:49,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:49,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 146 [2024-10-11 01:48:49,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:49,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 52 [2024-10-11 01:48:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 01:48:49,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:50,665 INFO L349 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2024-10-11 01:48:50,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 1 [2024-10-11 01:48:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863396710] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:50,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:50,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 12] total 29 [2024-10-11 01:48:50,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869747619] [2024-10-11 01:48:50,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:50,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 01:48:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:50,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 01:48:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2024-10-11 01:48:50,668 INFO L87 Difference]: Start difference. First operand 421 states and 530 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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) [2024-10-11 01:48:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:52,660 INFO L93 Difference]: Finished difference Result 828 states and 1067 transitions. [2024-10-11 01:48:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-11 01:48:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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 40 [2024-10-11 01:48:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:52,663 INFO L225 Difference]: With dead ends: 828 [2024-10-11 01:48:52,663 INFO L226 Difference]: Without dead ends: 767 [2024-10-11 01:48:52,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=929, Invalid=3763, Unknown=0, NotChecked=0, Total=4692 [2024-10-11 01:48:52,664 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 237 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:52,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 171 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 01:48:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2024-10-11 01:48:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 391. [2024-10-11 01:48:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.241025641025641) internal successors, (484), 390 states have internal predecessors, (484), 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) [2024-10-11 01:48:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 484 transitions. [2024-10-11 01:48:52,788 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 484 transitions. Word has length 40 [2024-10-11 01:48:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:52,789 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 484 transitions. [2024-10-11 01:48:52,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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) [2024-10-11 01:48:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 484 transitions. [2024-10-11 01:48:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 01:48:52,789 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:52,789 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:52,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 01:48:52,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 01:48:52,990 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:52,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 740429873, now seen corresponding path program 1 times [2024-10-11 01:48:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439325232] [2024-10-11 01:48:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 01:48:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439325232] [2024-10-11 01:48:53,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439325232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:53,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272767719] [2024-10-11 01:48:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:53,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:53,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:53,891 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 01:48:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:53,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 01:48:53,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:54,197 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 20 treesize of output 12 [2024-10-11 01:48:54,200 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 8 [2024-10-11 01:48:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 01:48:54,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:54,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:54,443 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 24 treesize of output 22 [2024-10-11 01:48:54,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:48:54,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2024-10-11 01:48:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 01:48:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272767719] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:54,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:54,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 32 [2024-10-11 01:48:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894529834] [2024-10-11 01:48:54,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:54,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 01:48:54,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 01:48:54,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2024-10-11 01:48:54,523 INFO L87 Difference]: Start difference. First operand 391 states and 484 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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) [2024-10-11 01:48:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:55,457 INFO L93 Difference]: Finished difference Result 584 states and 714 transitions. [2024-10-11 01:48:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 01:48:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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 40 [2024-10-11 01:48:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:55,459 INFO L225 Difference]: With dead ends: 584 [2024-10-11 01:48:55,459 INFO L226 Difference]: Without dead ends: 541 [2024-10-11 01:48:55,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 01:48:55,460 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 283 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:55,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 308 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 01:48:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-10-11 01:48:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 391. [2024-10-11 01:48:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.2307692307692308) internal successors, (480), 390 states have internal predecessors, (480), 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) [2024-10-11 01:48:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 480 transitions. [2024-10-11 01:48:55,583 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 480 transitions. Word has length 40 [2024-10-11 01:48:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:55,583 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 480 transitions. [2024-10-11 01:48:55,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 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) [2024-10-11 01:48:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 480 transitions. [2024-10-11 01:48:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 01:48:55,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:55,584 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:55,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 01:48:55,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:55,785 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:55,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1546077090, now seen corresponding path program 2 times [2024-10-11 01:48:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:55,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591424382] [2024-10-11 01:48:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 01:48:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591424382] [2024-10-11 01:48:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591424382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800921998] [2024-10-11 01:48:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:48:55,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:55,988 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:55,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 01:48:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:48:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:56,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 01:48:56,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:56,260 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 8 [2024-10-11 01:48:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 01:48:56,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:56,507 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 01:48:56,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2024-10-11 01:48:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-11 01:48:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800921998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:56,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2024-10-11 01:48:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831899496] [2024-10-11 01:48:56,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:56,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 01:48:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 01:48:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2024-10-11 01:48:56,557 INFO L87 Difference]: Start difference. First operand 391 states and 480 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 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) [2024-10-11 01:48:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:58,096 INFO L93 Difference]: Finished difference Result 1876 states and 2462 transitions. [2024-10-11 01:48:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-11 01:48:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 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 41 [2024-10-11 01:48:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:58,101 INFO L225 Difference]: With dead ends: 1876 [2024-10-11 01:48:58,101 INFO L226 Difference]: Without dead ends: 1827 [2024-10-11 01:48:58,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=3393, Unknown=0, NotChecked=0, Total=3906 [2024-10-11 01:48:58,102 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 824 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:58,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1089 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 01:48:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2024-10-11 01:48:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 439. [2024-10-11 01:48:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.2191780821917808) internal successors, (534), 438 states have internal predecessors, (534), 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) [2024-10-11 01:48:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 534 transitions. [2024-10-11 01:48:58,257 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 534 transitions. Word has length 41 [2024-10-11 01:48:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:58,257 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 534 transitions. [2024-10-11 01:48:58,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 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) [2024-10-11 01:48:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 534 transitions. [2024-10-11 01:48:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-11 01:48:58,258 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:58,258 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:48:58,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 01:48:58,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 01:48:58,459 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:58,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 976411459, now seen corresponding path program 1 times [2024-10-11 01:48:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778274463] [2024-10-11 01:48:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 01:48:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778274463] [2024-10-11 01:48:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778274463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286467512] [2024-10-11 01:48:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:59,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:59,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 01:48:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:59,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 01:48:59,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:48:59,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 01:48:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286467512] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:59,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:59,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 13] total 33 [2024-10-11 01:48:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383305781] [2024-10-11 01:48:59,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:59,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 01:48:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 01:48:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 01:48:59,732 INFO L87 Difference]: Start difference. First operand 439 states and 534 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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) [2024-10-11 01:49:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:00,344 INFO L93 Difference]: Finished difference Result 636 states and 775 transitions. [2024-10-11 01:49:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 01:49:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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 50 [2024-10-11 01:49:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:00,346 INFO L225 Difference]: With dead ends: 636 [2024-10-11 01:49:00,346 INFO L226 Difference]: Without dead ends: 561 [2024-10-11 01:49:00,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 01:49:00,347 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:00,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 347 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 01:49:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-10-11 01:49:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2024-10-11 01:49:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.220873786407767) internal successors, (503), 412 states have internal predecessors, (503), 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) [2024-10-11 01:49:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 503 transitions. [2024-10-11 01:49:00,488 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 503 transitions. Word has length 50 [2024-10-11 01:49:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:00,489 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 503 transitions. [2024-10-11 01:49:00,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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) [2024-10-11 01:49:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 503 transitions. [2024-10-11 01:49:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 01:49:00,490 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:00,490 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:00,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 01:49:00,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 01:49:00,691 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:00,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash 879844604, now seen corresponding path program 3 times [2024-10-11 01:49:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:00,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890855098] [2024-10-11 01:49:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-11 01:49:00,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890855098] [2024-10-11 01:49:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890855098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796874821] [2024-10-11 01:49:00,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:49:00,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:00,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:00,936 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:00,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 01:49:01,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 01:49:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:01,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 01:49:01,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-10-11 01:49:01,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-10-11 01:49:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796874821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:01,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 31 [2024-10-11 01:49:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418259640] [2024-10-11 01:49:01,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:01,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 01:49:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 01:49:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-10-11 01:49:01,847 INFO L87 Difference]: Start difference. First operand 413 states and 503 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2024-10-11 01:49:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:03,987 INFO L93 Difference]: Finished difference Result 1467 states and 1899 transitions. [2024-10-11 01:49:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-11 01:49:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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 55 [2024-10-11 01:49:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:03,991 INFO L225 Difference]: With dead ends: 1467 [2024-10-11 01:49:03,991 INFO L226 Difference]: Without dead ends: 1421 [2024-10-11 01:49:03,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=621, Invalid=5541, Unknown=0, NotChecked=0, Total=6162 [2024-10-11 01:49:03,993 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 601 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:03,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 894 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 01:49:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2024-10-11 01:49:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 393. [2024-10-11 01:49:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.211734693877551) internal successors, (475), 392 states have internal predecessors, (475), 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) [2024-10-11 01:49:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 475 transitions. [2024-10-11 01:49:04,147 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 475 transitions. Word has length 55 [2024-10-11 01:49:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:04,148 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 475 transitions. [2024-10-11 01:49:04,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2024-10-11 01:49:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 475 transitions. [2024-10-11 01:49:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 01:49:04,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:04,149 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 01:49:04,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 01:49:04,349 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:04,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1898640092, now seen corresponding path program 2 times [2024-10-11 01:49:04,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:04,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605896753] [2024-10-11 01:49:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 01:49:05,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605896753] [2024-10-11 01:49:05,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605896753] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816409326] [2024-10-11 01:49:05,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:49:05,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:05,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:05,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:05,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 01:49:05,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:49:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:05,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-11 01:49:05,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:05,821 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 19 treesize of output 11 [2024-10-11 01:49:05,824 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 15 treesize of output 7 [2024-10-11 01:49:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 01:49:05,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:06,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:06,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 55 [2024-10-11 01:49:06,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:06,039 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 45 treesize of output 35 [2024-10-11 01:49:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 01:49:06,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816409326] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:06,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:06,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 38 [2024-10-11 01:49:06,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415245042] [2024-10-11 01:49:06,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:06,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-11 01:49:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-11 01:49:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 01:49:06,169 INFO L87 Difference]: Start difference. First operand 393 states and 475 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 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) [2024-10-11 01:49:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:07,297 INFO L93 Difference]: Finished difference Result 1029 states and 1250 transitions. [2024-10-11 01:49:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 01:49:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 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 61 [2024-10-11 01:49:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:07,299 INFO L225 Difference]: With dead ends: 1029 [2024-10-11 01:49:07,299 INFO L226 Difference]: Without dead ends: 732 [2024-10-11 01:49:07,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=3250, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 01:49:07,301 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 249 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:07,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 459 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 01:49:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2024-10-11 01:49:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 612. [2024-10-11 01:49:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.199672667757774) internal successors, (733), 611 states have internal predecessors, (733), 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) [2024-10-11 01:49:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 733 transitions. [2024-10-11 01:49:07,560 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 733 transitions. Word has length 61 [2024-10-11 01:49:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:07,560 INFO L471 AbstractCegarLoop]: Abstraction has 612 states and 733 transitions. [2024-10-11 01:49:07,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 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) [2024-10-11 01:49:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 733 transitions. [2024-10-11 01:49:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 01:49:07,561 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:07,561 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:07,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 01:49:07,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:07,762 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:07,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1046943080, now seen corresponding path program 3 times [2024-10-11 01:49:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:07,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918990154] [2024-10-11 01:49:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:49:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918990154] [2024-10-11 01:49:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918990154] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857617728] [2024-10-11 01:49:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:49:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:09,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:09,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 01:49:09,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 01:49:09,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:09,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 01:49:09,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:09,988 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 11 [2024-10-11 01:49:09,989 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 15 treesize of output 7 [2024-10-11 01:49:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 01:49:10,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:10,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:10,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 57 [2024-10-11 01:49:10,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:10,291 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 47 treesize of output 35 [2024-10-11 01:49:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-11 01:49:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857617728] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:10,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:10,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 43 [2024-10-11 01:49:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320303694] [2024-10-11 01:49:10,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:10,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 01:49:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 01:49:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 01:49:10,412 INFO L87 Difference]: Start difference. First operand 612 states and 733 transitions. Second operand has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 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) [2024-10-11 01:49:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:11,774 INFO L93 Difference]: Finished difference Result 965 states and 1155 transitions. [2024-10-11 01:49:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 01:49:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 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 61 [2024-10-11 01:49:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:11,777 INFO L225 Difference]: With dead ends: 965 [2024-10-11 01:49:11,777 INFO L226 Difference]: Without dead ends: 903 [2024-10-11 01:49:11,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2024-10-11 01:49:11,778 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 193 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:11,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 567 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 01:49:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2024-10-11 01:49:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 785. [2024-10-11 01:49:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.2040816326530612) internal successors, (944), 784 states have internal predecessors, (944), 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) [2024-10-11 01:49:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 944 transitions. [2024-10-11 01:49:12,108 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 944 transitions. Word has length 61 [2024-10-11 01:49:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:12,108 INFO L471 AbstractCegarLoop]: Abstraction has 785 states and 944 transitions. [2024-10-11 01:49:12,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 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) [2024-10-11 01:49:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 944 transitions. [2024-10-11 01:49:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 01:49:12,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:12,109 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:12,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 01:49:12,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:12,310 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:12,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash -603508644, now seen corresponding path program 4 times [2024-10-11 01:49:12,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:12,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871199719] [2024-10-11 01:49:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 01:49:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871199719] [2024-10-11 01:49:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871199719] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365522411] [2024-10-11 01:49:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 01:49:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:13,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:13,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 01:49:13,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 01:49:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:13,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 01:49:13,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:14,201 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 20 treesize of output 12 [2024-10-11 01:49:14,202 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 8 [2024-10-11 01:49:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 01:49:14,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:14,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:14,454 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 26 treesize of output 24 [2024-10-11 01:49:14,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:14,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2024-10-11 01:49:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 01:49:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365522411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:14,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:14,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2024-10-11 01:49:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508471449] [2024-10-11 01:49:14,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:14,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 01:49:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 01:49:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 01:49:14,580 INFO L87 Difference]: Start difference. First operand 785 states and 944 transitions. Second operand has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 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) [2024-10-11 01:49:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:15,942 INFO L93 Difference]: Finished difference Result 946 states and 1127 transitions. [2024-10-11 01:49:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 01:49:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 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 61 [2024-10-11 01:49:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:15,945 INFO L225 Difference]: With dead ends: 946 [2024-10-11 01:49:15,945 INFO L226 Difference]: Without dead ends: 903 [2024-10-11 01:49:15,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 01:49:15,946 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:15,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 546 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 01:49:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2024-10-11 01:49:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 812. [2024-10-11 01:49:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 1.1972872996300863) internal successors, (971), 811 states have internal predecessors, (971), 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) [2024-10-11 01:49:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 971 transitions. [2024-10-11 01:49:16,293 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 971 transitions. Word has length 61 [2024-10-11 01:49:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:16,293 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 971 transitions. [2024-10-11 01:49:16,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 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) [2024-10-11 01:49:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 971 transitions. [2024-10-11 01:49:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 01:49:16,295 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:16,295 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:16,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 01:49:16,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:16,496 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:16,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1025401576, now seen corresponding path program 5 times [2024-10-11 01:49:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:16,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820800446] [2024-10-11 01:49:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:49:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820800446] [2024-10-11 01:49:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820800446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947181139] [2024-10-11 01:49:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 01:49:18,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:18,072 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:18,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 01:49:18,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-11 01:49:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:18,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 01:49:18,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:18,416 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 0 case distinctions, treesize of input 48 treesize of output 35 [2024-10-11 01:49:18,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 1 [2024-10-11 01:49:18,703 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 24 treesize of output 12 [2024-10-11 01:49:18,704 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 8 [2024-10-11 01:49:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 01:49:18,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:19,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 01:49:19,100 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 28 treesize of output 24 [2024-10-11 01:49:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 01:49:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947181139] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:19,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:19,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 51 [2024-10-11 01:49:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278763508] [2024-10-11 01:49:19,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:19,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-11 01:49:19,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-11 01:49:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2219, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 01:49:19,443 INFO L87 Difference]: Start difference. First operand 812 states and 971 transitions. Second operand has 51 states, 51 states have (on average 2.8627450980392157) internal successors, (146), 51 states have internal predecessors, (146), 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) [2024-10-11 01:49:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:49:21,583 INFO L93 Difference]: Finished difference Result 943 states and 1120 transitions. [2024-10-11 01:49:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 01:49:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.8627450980392157) internal successors, (146), 51 states have internal predecessors, (146), 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 61 [2024-10-11 01:49:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:49:21,586 INFO L225 Difference]: With dead ends: 943 [2024-10-11 01:49:21,586 INFO L226 Difference]: Without dead ends: 903 [2024-10-11 01:49:21,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=873, Invalid=5607, Unknown=0, NotChecked=0, Total=6480 [2024-10-11 01:49:21,587 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 279 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 01:49:21,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 599 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 01:49:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2024-10-11 01:49:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 815. [2024-10-11 01:49:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.1965601965601966) internal successors, (974), 814 states have internal predecessors, (974), 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) [2024-10-11 01:49:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 974 transitions. [2024-10-11 01:49:21,930 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 974 transitions. Word has length 61 [2024-10-11 01:49:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:49:21,930 INFO L471 AbstractCegarLoop]: Abstraction has 815 states and 974 transitions. [2024-10-11 01:49:21,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.8627450980392157) internal successors, (146), 51 states have internal predecessors, (146), 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) [2024-10-11 01:49:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 974 transitions. [2024-10-11 01:49:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 01:49:21,931 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:49:21,932 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:49:21,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 01:49:22,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:22,132 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:49:22,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:49:22,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1660897490, now seen corresponding path program 6 times [2024-10-11 01:49:22,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:49:22,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421332500] [2024-10-11 01:49:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:49:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:49:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:49:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-11 01:49:22,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:49:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421332500] [2024-10-11 01:49:22,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421332500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:49:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339444155] [2024-10-11 01:49:22,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 01:49:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:49:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:49:22,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:49:22,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 01:49:23,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-11 01:49:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:49:23,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 01:49:23,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:49:23,130 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 0 case distinctions, treesize of input 48 treesize of output 35 [2024-10-11 01:49:23,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-10-11 01:49:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 01:49:23,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:49:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 01:49:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339444155] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:49:24,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:49:24,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 40 [2024-10-11 01:49:24,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984494820] [2024-10-11 01:49:24,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:49:24,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 01:49:24,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:49:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 01:49:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 01:49:24,207 INFO L87 Difference]: Start difference. First operand 815 states and 974 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2024-10-11 01:49:36,667 WARN L286 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 58 DAG size of output: 42 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 01:49:49,131 WARN L286 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 65 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)