./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f961be2104ef3ac444088284f7936b105cc31dfbd8617bc6896bf1b51a5f23d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:01:45,191 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:01:45,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:01:45,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:01:45,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:01:45,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:01:45,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:01:45,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:01:45,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:01:45,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:01:45,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:01:45,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:01:45,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:01:45,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:01:45,312 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:01:45,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:01:45,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:01:45,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:01:45,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:01:45,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:01:45,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:01:45,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:01:45,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:01:45,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:01:45,319 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:01:45,319 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:01:45,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:01:45,320 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:01:45,321 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:01:45,321 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:01:45,321 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:01:45,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:01:45,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:01:45,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:01:45,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:01:45,323 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:01:45,324 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:01:45,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:01:45,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:01:45,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:01:45,324 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:01:45,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:01:45,325 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f961be2104ef3ac444088284f7936b105cc31dfbd8617bc6896bf1b51a5f23d [2024-10-12 15:01:45,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:01:45,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:01:45,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:01:45,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:01:45,630 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:01:45,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c [2024-10-12 15:01:47,134 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:01:47,325 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:01:47,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c [2024-10-12 15:01:47,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010e220d7/92ecef466580442ca35aad90345ce074/FLAG72d7db548 [2024-10-12 15:01:47,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010e220d7/92ecef466580442ca35aad90345ce074 [2024-10-12 15:01:47,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:01:47,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:01:47,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:01:47,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:01:47,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:01:47,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2025fa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47, skipping insertion in model container [2024-10-12 15:01:47,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:01:47,547 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c[588,601] [2024-10-12 15:01:47,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:01:47,580 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:01:47,594 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condm.c[588,601] [2024-10-12 15:01:47,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:01:47,631 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:01:47,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47 WrapperNode [2024-10-12 15:01:47,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:01:47,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:01:47,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:01:47,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:01:47,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,670 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-10-12 15:01:47,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:01:47,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:01:47,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:01:47,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:01:47,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,691 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,710 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 8, 6]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 3 writes are split as follows [0, 0, 3]. [2024-10-12 15:01:47,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:01:47,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:01:47,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:01:47,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:01:47,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (1/1) ... [2024-10-12 15:01:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:01:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:01:47,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 15:01:47,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 15:01:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:01:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:01:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:01:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:01:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:01:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:01:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:01:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:01:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:01:47,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:01:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:01:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:01:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:01:47,937 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:01:47,939 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:01:48,083 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 15:01:48,083 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:01:48,110 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:01:48,110 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 15:01:48,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:01:48 BoogieIcfgContainer [2024-10-12 15:01:48,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:01:48,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:01:48,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:01:48,118 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:01:48,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:01:47" (1/3) ... [2024-10-12 15:01:48,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1dbedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:01:48, skipping insertion in model container [2024-10-12 15:01:48,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:47" (2/3) ... [2024-10-12 15:01:48,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1dbedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:01:48, skipping insertion in model container [2024-10-12 15:01:48,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:01:48" (3/3) ... [2024-10-12 15:01:48,122 INFO L112 eAbstractionObserver]: Analyzing ICFG condm.c [2024-10-12 15:01:48,138 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:01:48,138 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:01:48,187 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:01:48,196 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;@e195f2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:01:48,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:01:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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) [2024-10-12 15:01:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:01:48,206 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:01:48,207 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:01:48,207 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:01:48,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:01:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1236320892, now seen corresponding path program 1 times [2024-10-12 15:01:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:01:48,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100085387] [2024-10-12 15:01:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:01:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:01:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100085387] [2024-10-12 15:01:48,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100085387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:01:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:01:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:01:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617013722] [2024-10-12 15:01:48,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:01:48,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:01:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:01:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:01:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:01:48,406 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:01:48,433 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2024-10-12 15:01:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:01:48,436 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 15:01:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:01:48,441 INFO L225 Difference]: With dead ends: 33 [2024-10-12 15:01:48,441 INFO L226 Difference]: Without dead ends: 15 [2024-10-12 15:01:48,443 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 [2024-10-12 15:01:48,446 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:01:48,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:01:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-12 15:01:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-12 15:01:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-12 15:01:48,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2024-10-12 15:01:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:01:48,473 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-12 15:01:48,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-12 15:01:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:01:48,474 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:01:48,475 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:01:48,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:01:48,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:01:48,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:01:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash -556262522, now seen corresponding path program 1 times [2024-10-12 15:01:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:01:48,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176528389] [2024-10-12 15:01:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:01:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:01:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176528389] [2024-10-12 15:01:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176528389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:01:48,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:01:48,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:01:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294947042] [2024-10-12 15:01:48,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:01:48,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:01:48,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:01:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:01:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:01:48,677 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:01:48,745 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-10-12 15:01:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:01:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 15:01:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:01:48,747 INFO L225 Difference]: With dead ends: 34 [2024-10-12 15:01:48,747 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 15:01:48,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:01:48,749 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:01:48,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:01:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 15:01:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2024-10-12 15:01:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2024-10-12 15:01:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-12 15:01:48,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-10-12 15:01:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:01:48,757 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-12 15:01:48,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-12 15:01:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 15:01:48,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:01:48,757 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:01:48,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:01:48,758 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:01:48,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:01:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash -157564324, now seen corresponding path program 1 times [2024-10-12 15:01:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:01:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143013610] [2024-10-12 15:01:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:01:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:01:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143013610] [2024-10-12 15:01:49,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143013610] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:01:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692140905] [2024-10-12 15:01:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:49,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:01:49,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:01:49,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:01:49,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:01:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:49,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-12 15:01:49,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:01:49,505 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 11 treesize of output 7 [2024-10-12 15:01:49,668 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 19 treesize of output 11 [2024-10-12 15:01:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:49,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:01:50,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-12 15:01:50,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2024-10-12 15:01:50,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-12 15:01:50,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-12 15:01:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692140905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:01:50,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:01:50,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 22 [2024-10-12 15:01:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418135260] [2024-10-12 15:01:50,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:01:50,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 15:01:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:01:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 15:01:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-10-12 15:01:50,499 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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) [2024-10-12 15:01:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:01:51,294 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2024-10-12 15:01:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 15:01:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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) Word has length 15 [2024-10-12 15:01:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:01:51,296 INFO L225 Difference]: With dead ends: 64 [2024-10-12 15:01:51,296 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 15:01:51,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2024-10-12 15:01:51,300 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 267 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:01:51,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 45 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:01:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 15:01:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2024-10-12 15:01:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:01:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-12 15:01:51,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2024-10-12 15:01:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:01:51,314 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-12 15:01:51,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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) [2024-10-12 15:01:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-12 15:01:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 15:01:51,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:01:51,317 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:01:51,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 15:01:51,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:01:51,518 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:01:51,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:01:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 12570417, now seen corresponding path program 1 times [2024-10-12 15:01:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:01:51,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352277370] [2024-10-12 15:01:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:01:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:01:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:01:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352277370] [2024-10-12 15:01:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352277370] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:01:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412055358] [2024-10-12 15:01:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:01:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:01:51,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:01:51,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:01:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:51,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:01:51,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:01:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:01:51,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:01:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:01:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412055358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:01:51,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:01:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:01:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316692264] [2024-10-12 15:01:51,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:01:51,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:01:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:01:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:01:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:01:51,827 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2024-10-12 15:01:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:01:51,926 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-10-12 15:01:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:01:51,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 18 [2024-10-12 15:01:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:01:51,928 INFO L225 Difference]: With dead ends: 62 [2024-10-12 15:01:51,928 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 15:01:51,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:01:51,929 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:01:51,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:01:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 15:01:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2024-10-12 15:01:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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) [2024-10-12 15:01:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-10-12 15:01:51,940 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2024-10-12 15:01:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:01:51,941 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-10-12 15:01:51,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2024-10-12 15:01:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-10-12 15:01:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:01:51,942 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:01:51,942 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:01:51,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 15:01:52,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-12 15:01:52,147 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:01:52,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:01:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2005361542, now seen corresponding path program 1 times [2024-10-12 15:01:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:01:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405567976] [2024-10-12 15:01:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:01:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 15:01:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:01:52,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405567976] [2024-10-12 15:01:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405567976] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:01:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310832043] [2024-10-12 15:01:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:01:52,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:01:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:01:52,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:01:52,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:01:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:01:52,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:01:52,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:01:52,531 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 11 treesize of output 7 [2024-10-12 15:01:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:01:52,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-12 15:01:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:01:52,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:01:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 23 [2024-10-12 15:01:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:01:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:01:52,853 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-10-12 15:01:52,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2024-10-12 15:01:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:52,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:01:54,142 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 233 treesize of output 217 [2024-10-12 15:01:54,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2024-10-12 15:01:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:01:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310832043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:01:54,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:01:54,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2024-10-12 15:01:54,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891993553] [2024-10-12 15:01:54,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:01:54,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:01:54,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:01:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:01:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:01:54,256 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2024-10-12 15:01:59,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-12 15:02:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:00,921 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-10-12 15:02:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:02:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) Word has length 19 [2024-10-12 15:02:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:00,922 INFO L225 Difference]: With dead ends: 69 [2024-10-12 15:02:00,923 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 15:02:00,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2024-10-12 15:02:00,924 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:00,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 82 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 333 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-10-12 15:02:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 15:02:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2024-10-12 15:02:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-10-12 15:02:00,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2024-10-12 15:02:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:00,937 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-10-12 15:02:00,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2024-10-12 15:02:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-10-12 15:02:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:02:00,950 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:00,951 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:01,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:01,156 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:01,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash -284437431, now seen corresponding path program 1 times [2024-10-12 15:02:01,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:01,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413773880] [2024-10-12 15:02:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:01,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413773880] [2024-10-12 15:02:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413773880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604692474] [2024-10-12 15:02:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:02,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:02,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:02:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:02,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 15:02:02,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:02,425 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 11 treesize of output 7 [2024-10-12 15:02:02,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 15:02:02,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:02,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2024-10-12 15:02:02,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:02,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2024-10-12 15:02:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:03,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:05,888 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 166 treesize of output 154 [2024-10-12 15:02:05,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:05,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 157 treesize of output 139 [2024-10-12 15:02:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:05,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604692474] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:05,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:05,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2024-10-12 15:02:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419666430] [2024-10-12 15:02:05,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:05,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:02:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:02:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 15:02:05,986 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:10,546 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-10-12 15:02:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 15:02:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-12 15:02:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:10,548 INFO L225 Difference]: With dead ends: 73 [2024-10-12 15:02:10,548 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 15:02:10,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=577, Invalid=2179, Unknown=0, NotChecked=0, Total=2756 [2024-10-12 15:02:10,550 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:10,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 78 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:02:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 15:02:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2024-10-12 15:02:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-10-12 15:02:10,561 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2024-10-12 15:02:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:10,562 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-10-12 15:02:10,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-10-12 15:02:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 15:02:10,562 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:10,563 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:10,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 15:02:10,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:10,767 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:10,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 300087270, now seen corresponding path program 2 times [2024-10-12 15:02:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531317094] [2024-10-12 15:02:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:02:10,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:10,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531317094] [2024-10-12 15:02:10,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531317094] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:10,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483772494] [2024-10-12 15:02:10,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:02:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:10,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:10,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:02:11,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:02:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:11,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:02:11,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:02:11,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:02:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483772494] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:11,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:02:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233269431] [2024-10-12 15:02:11,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:11,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:02:11,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:02:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:02:11,327 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-10-12 15:02:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:11,545 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2024-10-12 15:02:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:02:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 [2024-10-12 15:02:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:11,546 INFO L225 Difference]: With dead ends: 86 [2024-10-12 15:02:11,546 INFO L226 Difference]: Without dead ends: 56 [2024-10-12 15:02:11,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:02:11,547 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:11,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:02:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-12 15:02:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2024-10-12 15:02:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-12 15:02:11,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2024-10-12 15:02:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:11,574 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-12 15:02:11,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-10-12 15:02:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-12 15:02:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:02:11,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:11,575 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:11,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:11,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:11,776 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:11,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -435615439, now seen corresponding path program 2 times [2024-10-12 15:02:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:11,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619894668] [2024-10-12 15:02:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:13,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619894668] [2024-10-12 15:02:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619894668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343340048] [2024-10-12 15:02:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:02:13,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:13,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:13,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 15:02:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:02:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:13,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-12 15:02:13,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:13,766 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 11 treesize of output 7 [2024-10-12 15:02:13,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 15:02:13,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:13,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-12 15:02:13,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:13,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-12 15:02:14,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:14,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-12 15:02:14,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:14,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2024-10-12 15:02:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:14,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:17,012 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 85 treesize of output 79 [2024-10-12 15:02:17,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:17,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 80 treesize of output 72 [2024-10-12 15:02:17,034 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 67 treesize of output 63 [2024-10-12 15:02:17,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:17,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 582 treesize of output 534 [2024-10-12 15:02:17,088 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 87 treesize of output 81 [2024-10-12 15:02:17,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:17,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 80 treesize of output 1 [2024-10-12 15:02:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343340048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:17,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2024-10-12 15:02:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620685676] [2024-10-12 15:02:17,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:17,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-12 15:02:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-12 15:02:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 15:02:17,148 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 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) [2024-10-12 15:02:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:31,627 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2024-10-12 15:02:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-12 15:02:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 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 26 [2024-10-12 15:02:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:31,630 INFO L225 Difference]: With dead ends: 132 [2024-10-12 15:02:31,630 INFO L226 Difference]: Without dead ends: 113 [2024-10-12 15:02:31,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=1049, Invalid=6961, Unknown=0, NotChecked=0, Total=8010 [2024-10-12 15:02:31,635 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 288 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:31,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 242 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-10-12 15:02:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-12 15:02:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 44. [2024-10-12 15:02:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-12 15:02:31,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2024-10-12 15:02:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:31,655 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-12 15:02:31,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 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) [2024-10-12 15:02:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-12 15:02:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 15:02:31,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:31,656 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:31,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:31,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:31,857 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:31,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1976744446, now seen corresponding path program 3 times [2024-10-12 15:02:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:31,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921599384] [2024-10-12 15:02:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921599384] [2024-10-12 15:02:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921599384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533493787] [2024-10-12 15:02:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:02:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:33,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:33,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 15:02:33,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 15:02:33,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:33,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-12 15:02:33,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:33,884 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 11 treesize of output 7 [2024-10-12 15:02:33,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 15:02:33,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:33,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-12 15:02:34,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:34,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-12 15:02:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:02:34,221 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-10-12 15:02:34,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 39 [2024-10-12 15:02:34,447 INFO L349 Elim1Store]: treesize reduction 42, result has 58.0 percent of original size [2024-10-12 15:02:34,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 86 [2024-10-12 15:02:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:35,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:38,468 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 217 treesize of output 205 [2024-10-12 15:02:38,502 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2024-10-12 15:02:38,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 116314 treesize of output 100754 [2024-10-12 15:02:38,640 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 219 treesize of output 207 [2024-10-12 15:02:38,665 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-10-12 15:02:38,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1199130 treesize of output 1 [2024-10-12 15:02:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533493787] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:38,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 56 [2024-10-12 15:02:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019560634] [2024-10-12 15:02:38,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:38,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-12 15:02:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-12 15:02:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2024-10-12 15:02:38,716 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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) [2024-10-12 15:02:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:54,075 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2024-10-12 15:02:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-12 15:02:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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 [2024-10-12 15:02:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:54,076 INFO L225 Difference]: With dead ends: 124 [2024-10-12 15:02:54,076 INFO L226 Difference]: Without dead ends: 122 [2024-10-12 15:02:54,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1947, Invalid=10263, Unknown=0, NotChecked=0, Total=12210 [2024-10-12 15:02:54,078 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 351 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:54,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 145 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-12 15:02:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-12 15:02:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2024-10-12 15:02:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 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) [2024-10-12 15:02:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-10-12 15:02:54,117 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 29 [2024-10-12 15:02:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:54,117 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-10-12 15:02:54,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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) [2024-10-12 15:02:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-10-12 15:02:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:02:54,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:54,119 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:54,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:54,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:54,319 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:54,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash -294303835, now seen corresponding path program 3 times [2024-10-12 15:02:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645383118] [2024-10-12 15:02:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:02:54,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:54,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645383118] [2024-10-12 15:02:54,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645383118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:54,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443278024] [2024-10-12 15:02:54,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:02:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:54,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:54,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 15:02:54,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 15:02:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:54,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:02:54,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:02:54,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:02:54,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443278024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:54,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:02:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994200817] [2024-10-12 15:02:54,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:54,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:02:54,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:02:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:02:54,901 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:55,435 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2024-10-12 15:02:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 15:02:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-12 15:02:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:55,436 INFO L225 Difference]: With dead ends: 131 [2024-10-12 15:02:55,436 INFO L226 Difference]: Without dead ends: 107 [2024-10-12 15:02:55,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2024-10-12 15:02:55,437 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:55,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 96 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:02:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-12 15:02:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 81. [2024-10-12 15:02:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.125) internal successors, (90), 80 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) [2024-10-12 15:02:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-10-12 15:02:55,477 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 33 [2024-10-12 15:02:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:55,478 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-10-12 15:02:55,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-10-12 15:02:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 15:02:55,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:55,479 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:55,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 15:02:55,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-12 15:02:55,679 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:55,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 622222779, now seen corresponding path program 4 times [2024-10-12 15:02:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817601107] [2024-10-12 15:02:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:02:55,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817601107] [2024-10-12 15:02:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817601107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415911872] [2024-10-12 15:02:55,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:02:55,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:55,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:55,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 15:02:55,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:02:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:55,955 WARN L253 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-12 15:02:55,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:55,964 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 16 treesize of output 12 [2024-10-12 15:02:55,991 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 28 treesize of output 27 [2024-10-12 15:02:56,134 INFO L349 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2024-10-12 15:02:56,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-10-12 15:02:56,257 INFO L349 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2024-10-12 15:02:56,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 43 [2024-10-12 15:02:56,433 INFO L349 Elim1Store]: treesize reduction 50, result has 42.5 percent of original size [2024-10-12 15:02:56,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 62 [2024-10-12 15:02:56,659 INFO L349 Elim1Store]: treesize reduction 50, result has 42.5 percent of original size [2024-10-12 15:02:56,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 54 [2024-10-12 15:02:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 15:02:56,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:03:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415911872] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:00,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:03:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 20] total 42 [2024-10-12 15:03:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554622945] [2024-10-12 15:03:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:00,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-12 15:03:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-12 15:03:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2024-10-12 15:03:00,908 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 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)