./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/array-tiling/mbpr2.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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:52:07,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:52:07,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:52:07,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:52:07,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:52:07,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:52:07,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:52:07,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:52:07,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:52:07,895 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:52:07,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:52:07,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:52:07,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:52:07,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:52:07,897 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:52:07,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:52:07,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:52:07,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:52:07,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:52:07,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:52:07,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:52:07,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:52:07,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:52:07,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:52:07,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:52:07,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:52:07,901 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:52:07,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:52:07,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:52:07,902 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:52:07,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:52:07,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:52:07,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:52:07,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:52:07,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:52:07,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:52:07,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:52:07,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:52:07,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:52:07,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:52:07,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:52:07,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:52:07,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2023-11-22 18:52:08,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:52:08,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:52:08,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:52:08,148 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:52:08,151 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:52:08,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2023-11-22 18:52:09,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:52:09,245 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:52:09,246 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c [2023-11-22 18:52:09,252 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f737a3/d53a51e1e780426f90abc73f120c8b83/FLAG59d6c502c [2023-11-22 18:52:09,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f737a3/d53a51e1e780426f90abc73f120c8b83 [2023-11-22 18:52:09,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:52:09,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:52:09,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:52:09,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:52:09,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:52:09,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eefc067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09, skipping insertion in model container [2023-11-22 18:52:09,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:52:09,467 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-11-22 18:52:09,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:52:09,498 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:52:09,509 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-11-22 18:52:09,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:52:09,549 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:52:09,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09 WrapperNode [2023-11-22 18:52:09,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:52:09,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:52:09,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:52:09,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:52:09,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,606 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-11-22 18:52:09,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:52:09,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:52:09,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:52:09,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:52:09,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,617 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,625 INFO L189 HeapSplitter]: Split 20 memory accesses to 3 slices as follows [2, 8, 10] [2023-11-22 18:52:09,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:52:09,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:52:09,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:52:09,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:52:09,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (1/1) ... [2023-11-22 18:52:09,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:52:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:09,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:52:09,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:52:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:52:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:52:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:52:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:52:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:52:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:52:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:52:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:52:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:52:09,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:52:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:52:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:52:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:52:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:52:09,771 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:52:09,774 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:52:09,957 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:52:09,981 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:52:09,982 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 18:52:09,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:52:09 BoogieIcfgContainer [2023-11-22 18:52:09,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:52:09,985 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:52:09,985 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:52:09,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:52:09,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:52:09" (1/3) ... [2023-11-22 18:52:09,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e04611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:52:09, skipping insertion in model container [2023-11-22 18:52:09,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:09" (2/3) ... [2023-11-22 18:52:09,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e04611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:52:09, skipping insertion in model container [2023-11-22 18:52:09,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:52:09" (3/3) ... [2023-11-22 18:52:09,991 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2023-11-22 18:52:10,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:52:10,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:52:10,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:52:10,053 INFO L357 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, mHoare=true, 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;@5e86f304, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:52:10,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:52:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 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) [2023-11-22 18:52:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:52:10,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:10,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:10,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:10,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash -951462663, now seen corresponding path program 1 times [2023-11-22 18:52:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:10,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651976759] [2023-11-22 18:52:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651976759] [2023-11-22 18:52:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651976759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:52:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612919831] [2023-11-22 18:52:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 18:52:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 18:52:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:52:10,275 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:10,293 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2023-11-22 18:52:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 18:52:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:52:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:10,300 INFO L225 Difference]: With dead ends: 44 [2023-11-22 18:52:10,301 INFO L226 Difference]: Without dead ends: 20 [2023-11-22 18:52:10,303 INFO L412 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 [2023-11-22 18:52:10,305 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:10,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-22 18:52:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-22 18:52:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-22 18:52:10,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2023-11-22 18:52:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:10,372 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-22 18:52:10,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-22 18:52:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:52:10,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:10,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:10,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:52:10,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:10,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1175939807, now seen corresponding path program 1 times [2023-11-22 18:52:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:10,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414975538] [2023-11-22 18:52:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:10,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414975538] [2023-11-22 18:52:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414975538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:10,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:10,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:52:10,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681315404] [2023-11-22 18:52:10,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:52:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:52:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:52:10,536 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:10,563 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-22 18:52:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:52:10,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:52:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:10,564 INFO L225 Difference]: With dead ends: 25 [2023-11-22 18:52:10,565 INFO L226 Difference]: Without dead ends: 23 [2023-11-22 18:52:10,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:52:10,566 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:10,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-22 18:52:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-22 18:52:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2023-11-22 18:52:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-22 18:52:10,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-11-22 18:52:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:10,570 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-22 18:52:10,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-22 18:52:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:52:10,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:10,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:10,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:52:10,571 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:10,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1175880225, now seen corresponding path program 1 times [2023-11-22 18:52:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:10,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054079747] [2023-11-22 18:52:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054079747] [2023-11-22 18:52:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054079747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:10,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:52:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4418796] [2023-11-22 18:52:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:10,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:52:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:52:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:52:10,726 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:10,762 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-11-22 18:52:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:52:10,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:52:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:10,763 INFO L225 Difference]: With dead ends: 42 [2023-11-22 18:52:10,763 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 18:52:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:52:10,766 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 18:52:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-22 18:52:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2023-11-22 18:52:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-22 18:52:10,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2023-11-22 18:52:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:10,771 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-22 18:52:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-22 18:52:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 18:52:10,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:10,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:52:10,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:10,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529468, now seen corresponding path program 1 times [2023-11-22 18:52:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729075029] [2023-11-22 18:52:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729075029] [2023-11-22 18:52:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729075029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:10,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:52:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888771113] [2023-11-22 18:52:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:10,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:52:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:52:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:52:10,855 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2023-11-22 18:52:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:10,869 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-22 18:52:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:52:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) Word has length 20 [2023-11-22 18:52:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:10,870 INFO L225 Difference]: With dead ends: 37 [2023-11-22 18:52:10,870 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 18:52:10,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:52:10,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:10,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 18:52:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 18:52:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-22 18:52:10,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2023-11-22 18:52:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:10,880 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-22 18:52:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2023-11-22 18:52:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-22 18:52:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 18:52:10,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:10,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:52:10,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1657379458, now seen corresponding path program 1 times [2023-11-22 18:52:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982848734] [2023-11-22 18:52:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:11,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:11,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982848734] [2023-11-22 18:52:11,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982848734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829920630] [2023-11-22 18:52:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:11,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:11,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:11,421 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) [2023-11-22 18:52:11,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:52:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:11,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 18:52:11,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:11,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:52:11,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:11,631 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 23 treesize of output 18 [2023-11-22 18:52:11,693 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 [2023-11-22 18:52:11,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:11,720 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 30 treesize of output 21 [2023-11-22 18:52:11,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:11,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-11-22 18:52:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:11,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:11,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:52:11,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-22 18:52:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:11,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829920630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:11,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:11,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-22 18:52:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077649134] [2023-11-22 18:52:11,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 18:52:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 18:52:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:52:11,972 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2023-11-22 18:52:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:12,213 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-22 18:52:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:52:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) Word has length 20 [2023-11-22 18:52:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:12,215 INFO L225 Difference]: With dead ends: 61 [2023-11-22 18:52:12,215 INFO L226 Difference]: Without dead ends: 43 [2023-11-22 18:52:12,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:52:12,219 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:12,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 68 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-22 18:52:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-22 18:52:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2023-11-22 18:52:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-22 18:52:12,231 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-11-22 18:52:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:12,232 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-22 18:52:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2023-11-22 18:52:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-22 18:52:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:52:12,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:12,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:12,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:12,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:12,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1879775925, now seen corresponding path program 1 times [2023-11-22 18:52:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:12,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467900262] [2023-11-22 18:52:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:12,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467900262] [2023-11-22 18:52:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467900262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79727556] [2023-11-22 18:52:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:12,642 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) [2023-11-22 18:52:12,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:52:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:12,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:52:12,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:12,709 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 [2023-11-22 18:52:12,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:12,716 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 23 treesize of output 18 [2023-11-22 18:52:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:12,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:12,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:52:12,806 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 12 [2023-11-22 18:52:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:12,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79727556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:12,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:12,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-11-22 18:52:12,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399598783] [2023-11-22 18:52:12,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:52:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:52:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:52:12,817 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:12,951 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-11-22 18:52:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 18:52:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-22 18:52:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:12,953 INFO L225 Difference]: With dead ends: 43 [2023-11-22 18:52:12,953 INFO L226 Difference]: Without dead ends: 41 [2023-11-22 18:52:12,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:52:12,954 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:12,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-22 18:52:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2023-11-22 18:52:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2023-11-22 18:52:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-22 18:52:12,968 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2023-11-22 18:52:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:12,968 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-22 18:52:12,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-22 18:52:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 18:52:12,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:12,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:12,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:13,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 18:52:13,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:13,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2092568542, now seen corresponding path program 2 times [2023-11-22 18:52:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:13,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681182755] [2023-11-22 18:52:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:13,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681182755] [2023-11-22 18:52:13,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681182755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:13,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917553109] [2023-11-22 18:52:13,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:52:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:13,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:13,417 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) [2023-11-22 18:52:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:52:13,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:52:13,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:13,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 18:52:13,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:13,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:13,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917553109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:13,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:13,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-11-22 18:52:13,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759058995] [2023-11-22 18:52:13,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:13,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:52:13,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:52:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:52:13,799 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:13,974 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2023-11-22 18:52:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 18:52:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 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 30 [2023-11-22 18:52:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:13,977 INFO L225 Difference]: With dead ends: 81 [2023-11-22 18:52:13,977 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 18:52:13,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2023-11-22 18:52:13,980 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:13,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 18:52:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-22 18:52:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2023-11-22 18:52:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-22 18:52:13,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2023-11-22 18:52:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:13,987 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-22 18:52:13,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-22 18:52:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 18:52:13,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:13,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:14,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:14,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:14,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:14,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:14,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1602392481, now seen corresponding path program 3 times [2023-11-22 18:52:14,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:14,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955978798] [2023-11-22 18:52:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:14,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955978798] [2023-11-22 18:52:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955978798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226166229] [2023-11-22 18:52:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:52:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:14,668 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) [2023-11-22 18:52:14,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:52:14,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:52:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:14,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 18:52:14,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:14,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:52:14,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:14,828 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 23 treesize of output 18 [2023-11-22 18:52:14,875 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 23 treesize of output 22 [2023-11-22 18:52:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:14,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:14,908 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 42 treesize of output 36 [2023-11-22 18:52:14,977 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-22 18:52:14,977 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 2 case distinctions, treesize of input 34 treesize of output 36 [2023-11-22 18:52:15,042 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-22 18:52:15,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 50 [2023-11-22 18:52:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:15,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:15,701 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 37 treesize of output 33 [2023-11-22 18:52:15,704 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 43 treesize of output 35 [2023-11-22 18:52:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226166229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:15,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 14] total 38 [2023-11-22 18:52:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110295297] [2023-11-22 18:52:15,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 18:52:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 18:52:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 18:52:15,828 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:16,681 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-22 18:52:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 18:52:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-22 18:52:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:16,682 INFO L225 Difference]: With dead ends: 66 [2023-11-22 18:52:16,682 INFO L226 Difference]: Without dead ends: 57 [2023-11-22 18:52:16,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=615, Invalid=3045, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 18:52:16,683 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:16,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 109 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:52:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-22 18:52:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2023-11-22 18:52:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-22 18:52:16,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2023-11-22 18:52:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:16,689 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-22 18:52:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-22 18:52:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-22 18:52:16,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:16,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:16,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:16,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:16,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2015660428, now seen corresponding path program 4 times [2023-11-22 18:52:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:16,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423271368] [2023-11-22 18:52:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:16,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:17,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:17,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423271368] [2023-11-22 18:52:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423271368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:17,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941331124] [2023-11-22 18:52:17,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:52:17,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:17,272 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) [2023-11-22 18:52:17,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:52:17,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:52:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:17,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 18:52:17,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:17,346 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 13 treesize of output 9 [2023-11-22 18:52:17,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:17,361 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 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-22 18:52:17,386 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 23 treesize of output 22 [2023-11-22 18:52:17,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:17,405 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 3 case distinctions, treesize of input 38 treesize of output 34 [2023-11-22 18:52:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:17,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:17,832 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 83 treesize of output 75 [2023-11-22 18:52:17,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:17,838 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 175 treesize of output 143 [2023-11-22 18:52:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:17,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941331124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:17,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:17,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 37 [2023-11-22 18:52:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967828412] [2023-11-22 18:52:17,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:17,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 18:52:17,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:17,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 18:52:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 18:52:17,859 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:19,290 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2023-11-22 18:52:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:52:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-22 18:52:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:19,292 INFO L225 Difference]: With dead ends: 155 [2023-11-22 18:52:19,292 INFO L226 Difference]: Without dead ends: 130 [2023-11-22 18:52:19,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1352, Invalid=7390, Unknown=0, NotChecked=0, Total=8742 [2023-11-22 18:52:19,295 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 410 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:19,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 113 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:52:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-22 18:52:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 68. [2023-11-22 18:52:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 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) [2023-11-22 18:52:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-22 18:52:19,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 41 [2023-11-22 18:52:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:19,304 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-22 18:52:19,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-22 18:52:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 18:52:19,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:19,305 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:19,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:19,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:19,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1440232319, now seen corresponding path program 5 times [2023-11-22 18:52:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987669932] [2023-11-22 18:52:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987669932] [2023-11-22 18:52:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987669932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:19,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586878062] [2023-11-22 18:52:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:52:19,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:19,784 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) [2023-11-22 18:52:19,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 18:52:19,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-22 18:52:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:19,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:52:19,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:20,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586878062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:20,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2023-11-22 18:52:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487302277] [2023-11-22 18:52:20,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-22 18:52:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-22 18:52:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 18:52:20,339 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:20,571 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-11-22 18:52:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:52:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 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 46 [2023-11-22 18:52:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:20,572 INFO L225 Difference]: With dead ends: 117 [2023-11-22 18:52:20,572 INFO L226 Difference]: Without dead ends: 67 [2023-11-22 18:52:20,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:52:20,573 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 185 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:20,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 130 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-22 18:52:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2023-11-22 18:52:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-22 18:52:20,579 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2023-11-22 18:52:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:20,580 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-22 18:52:20,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-22 18:52:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-22 18:52:20,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:20,581 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:20,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-22 18:52:20,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:20,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:20,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 5331550, now seen corresponding path program 6 times [2023-11-22 18:52:20,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:20,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161987823] [2023-11-22 18:52:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:20,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161987823] [2023-11-22 18:52:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161987823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252087750] [2023-11-22 18:52:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:52:21,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:21,301 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) [2023-11-22 18:52:21,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 18:52:21,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 18:52:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:21,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:52:21,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:21,443 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 [2023-11-22 18:52:21,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:21,466 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 23 treesize of output 18 [2023-11-22 18:52:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,495 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 23 treesize of output 22 [2023-11-22 18:52:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:21,526 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 42 treesize of output 36 [2023-11-22 18:52:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:21,589 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 34 treesize of output 36 [2023-11-22 18:52:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:21,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:21,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2023-11-22 18:52:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-22 18:52:25,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:28,567 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 42 treesize of output 38 [2023-11-22 18:52:28,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:52:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-22 18:52:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252087750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:28,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 33 [2023-11-22 18:52:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604955730] [2023-11-22 18:52:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-22 18:52:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-22 18:52:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=896, Unknown=2, NotChecked=0, Total=1056 [2023-11-22 18:52:28,628 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:31,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:52:35,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:52:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:42,864 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2023-11-22 18:52:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-22 18:52:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-22 18:52:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:42,865 INFO L225 Difference]: With dead ends: 100 [2023-11-22 18:52:42,865 INFO L226 Difference]: Without dead ends: 81 [2023-11-22 18:52:42,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=724, Invalid=3560, Unknown=6, NotChecked=0, Total=4290 [2023-11-22 18:52:42,866 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 336 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:42,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 195 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 784 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-22 18:52:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-22 18:52:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2023-11-22 18:52:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-22 18:52:42,872 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 52 [2023-11-22 18:52:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:42,872 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-22 18:52:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-22 18:52:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:52:42,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:42,873 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:42,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:43,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:43,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:43,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1041674349, now seen corresponding path program 7 times [2023-11-22 18:52:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:43,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474264017] [2023-11-22 18:52:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 18:52:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474264017] [2023-11-22 18:52:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474264017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372418383] [2023-11-22 18:52:43,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:52:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:43,777 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) [2023-11-22 18:52:43,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 18:52:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:43,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-22 18:52:43,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:43,953 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 [2023-11-22 18:52:43,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:43,977 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 23 treesize of output 18 [2023-11-22 18:52:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:44,005 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 23 treesize of output 22 [2023-11-22 18:52:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:44,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:44,037 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 42 treesize of output 36 [2023-11-22 18:52:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:52:44,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:44,540 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 42 treesize of output 38 [2023-11-22 18:52:44,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:52:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 18:52:44,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372418383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:44,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:44,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 41 [2023-11-22 18:52:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652435766] [2023-11-22 18:52:44,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 18:52:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 18:52:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 18:52:44,621 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:46,863 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2023-11-22 18:52:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 18:52:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-22 18:52:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:46,863 INFO L225 Difference]: With dead ends: 74 [2023-11-22 18:52:46,863 INFO L226 Difference]: Without dead ends: 60 [2023-11-22 18:52:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=539, Invalid=2651, Unknown=2, NotChecked=0, Total=3192 [2023-11-22 18:52:46,864 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:46,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 254 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 610 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 18:52:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-22 18:52:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-11-22 18:52:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-11-22 18:52:46,870 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 57 [2023-11-22 18:52:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:46,870 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-11-22 18:52:46,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-11-22 18:52:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:52:46,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:46,871 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:46,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 18:52:47,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:47,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2052791599, now seen corresponding path program 8 times [2023-11-22 18:52:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53002290] [2023-11-22 18:52:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53002290] [2023-11-22 18:52:47,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53002290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396298014] [2023-11-22 18:52:47,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:52:47,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:47,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:47,652 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) [2023-11-22 18:52:47,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 18:52:47,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:52:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:47,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 18:52:47,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:47,823 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 [2023-11-22 18:52:47,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:47,852 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 23 treesize of output 18 [2023-11-22 18:52:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:48,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:48,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:52:48,269 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 12 [2023-11-22 18:52:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396298014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:48,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:48,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 38 [2023-11-22 18:52:48,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757071939] [2023-11-22 18:52:48,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:48,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 18:52:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 18:52:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 18:52:48,279 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:49,434 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-11-22 18:52:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-22 18:52:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-22 18:52:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:49,435 INFO L225 Difference]: With dead ends: 99 [2023-11-22 18:52:49,435 INFO L226 Difference]: Without dead ends: 97 [2023-11-22 18:52:49,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=775, Invalid=5077, Unknown=0, NotChecked=0, Total=5852 [2023-11-22 18:52:49,437 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:49,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 172 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:52:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-22 18:52:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2023-11-22 18:52:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-11-22 18:52:49,452 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 57 [2023-11-22 18:52:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:49,454 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-11-22 18:52:49,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-11-22 18:52:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-22 18:52:49,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:49,456 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:49,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:49,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 18:52:49,667 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:49,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2009397570, now seen corresponding path program 9 times [2023-11-22 18:52:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:49,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510091506] [2023-11-22 18:52:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:49,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510091506] [2023-11-22 18:52:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510091506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141549839] [2023-11-22 18:52:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:52:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:50,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:52:50,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 18:52:50,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-22 18:52:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:50,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:52:50,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:50,189 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 13 treesize of output 9 [2023-11-22 18:52:50,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:50,215 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:52:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:52:50,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:50,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:52:50,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-22 18:52:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:52:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141549839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:50,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2023-11-22 18:52:50,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200294258] [2023-11-22 18:52:50,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:50,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-22 18:52:50,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-22 18:52:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 18:52:50,669 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:51,913 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2023-11-22 18:52:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-22 18:52:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-22 18:52:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:51,914 INFO L225 Difference]: With dead ends: 179 [2023-11-22 18:52:51,914 INFO L226 Difference]: Without dead ends: 96 [2023-11-22 18:52:51,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=884, Invalid=5436, Unknown=0, NotChecked=0, Total=6320 [2023-11-22 18:52:51,915 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 387 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:51,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 336 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:52:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-22 18:52:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2023-11-22 18:52:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-11-22 18:52:51,923 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2023-11-22 18:52:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:51,923 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-11-22 18:52:51,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-11-22 18:52:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 18:52:51,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:51,924 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:51,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 18:52:52,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:52,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 215400069, now seen corresponding path program 10 times [2023-11-22 18:52:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:52,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399802661] [2023-11-22 18:52:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:53,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399802661] [2023-11-22 18:52:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399802661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031570002] [2023-11-22 18:52:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:52:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:53,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:52:53,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 18:52:53,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:52:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:53,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-22 18:52:53,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:53,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 18:52:53,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,581 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:52:53,628 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 23 treesize of output 22 [2023-11-22 18:52:53,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,656 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 3 case distinctions, treesize of input 34 treesize of output 32 [2023-11-22 18:52:53,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,690 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 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-22 18:52:53,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 46 [2023-11-22 18:52:53,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,772 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 3 case distinctions, treesize of input 41 treesize of output 46 [2023-11-22 18:52:53,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 58 [2023-11-22 18:52:53,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2023-11-22 18:52:53,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:53,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 61 [2023-11-22 18:52:54,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 19 [2023-11-22 18:52:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:54,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:54,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-22 18:52:54,933 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 24 treesize of output 20 [2023-11-22 18:52:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 109 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:52:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031570002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:54,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 16] total 53 [2023-11-22 18:52:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002362323] [2023-11-22 18:52:54,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 18:52:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 18:52:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:52:54,956 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:56,937 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-11-22 18:52:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-22 18:52:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 0 states have call successors, (0), 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 68 [2023-11-22 18:52:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:56,938 INFO L225 Difference]: With dead ends: 107 [2023-11-22 18:52:56,938 INFO L226 Difference]: Without dead ends: 98 [2023-11-22 18:52:56,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=742, Invalid=6740, Unknown=0, NotChecked=0, Total=7482 [2023-11-22 18:52:56,940 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 313 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:56,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 356 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 18:52:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-22 18:52:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2023-11-22 18:52:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-11-22 18:52:56,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2023-11-22 18:52:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:56,950 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-11-22 18:52:56,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:52:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-11-22 18:52:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 18:52:56,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:56,951 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:56,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 18:52:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 18:52:57,152 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:57,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1347662322, now seen corresponding path program 11 times [2023-11-22 18:52:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:57,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935324874] [2023-11-22 18:52:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935324874] [2023-11-22 18:52:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935324874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973319606] [2023-11-22 18:52:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:52:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:57,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:52:57,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 18:52:57,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-22 18:52:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:57,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 18:52:57,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:58,084 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 [2023-11-22 18:52:58,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:58,110 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 23 treesize of output 18 [2023-11-22 18:52:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:52:58,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:58,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:52:58,566 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 12 [2023-11-22 18:52:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:52:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973319606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:58,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:58,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 41 [2023-11-22 18:52:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961217322] [2023-11-22 18:52:58,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 18:52:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 18:52:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 18:52:58,580 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:00,409 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2023-11-22 18:53:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-22 18:53:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 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 73 [2023-11-22 18:53:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:00,410 INFO L225 Difference]: With dead ends: 157 [2023-11-22 18:53:00,410 INFO L226 Difference]: Without dead ends: 155 [2023-11-22 18:53:00,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3294 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1328, Invalid=9802, Unknown=0, NotChecked=0, Total=11130 [2023-11-22 18:53:00,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 312 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:00,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 316 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 18:53:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-22 18:53:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 79. [2023-11-22 18:53:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-11-22 18:53:00,423 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 73 [2023-11-22 18:53:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:00,423 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-11-22 18:53:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-11-22 18:53:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-22 18:53:00,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:00,424 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:00,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:00,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 18:53:00,629 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:00,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2025851941, now seen corresponding path program 12 times [2023-11-22 18:53:00,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:00,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868831854] [2023-11-22 18:53:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:53:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868831854] [2023-11-22 18:53:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868831854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280410393] [2023-11-22 18:53:01,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:53:01,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:01,141 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:01,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 18:53:01,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 18:53:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:01,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 18:53:01,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 182 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:53:01,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 172 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:53:02,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280410393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:02,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:02,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 55 [2023-11-22 18:53:02,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019845266] [2023-11-22 18:53:02,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:53:02,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:53:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:53:02,244 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:02,755 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2023-11-22 18:53:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 18:53:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 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 78 [2023-11-22 18:53:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:02,756 INFO L225 Difference]: With dead ends: 196 [2023-11-22 18:53:02,756 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 18:53:02,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1330, Invalid=4220, Unknown=0, NotChecked=0, Total=5550 [2023-11-22 18:53:02,757 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:02,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 245 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:53:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 18:53:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-11-22 18:53:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-11-22 18:53:02,768 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 78 [2023-11-22 18:53:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:02,768 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-11-22 18:53:02,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-11-22 18:53:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-22 18:53:02,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:02,769 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:02,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:02,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 18:53:02,976 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1449714244, now seen corresponding path program 13 times [2023-11-22 18:53:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:02,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451097558] [2023-11-22 18:53:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 191 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:53:03,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451097558] [2023-11-22 18:53:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451097558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421277423] [2023-11-22 18:53:03,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:53:03,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:03,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:03,801 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:03,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 18:53:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:03,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-22 18:53:03,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:04,052 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 [2023-11-22 18:53:04,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:04,082 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 23 treesize of output 18 [2023-11-22 18:53:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:04,113 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 23 treesize of output 22 [2023-11-22 18:53:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:04,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:04,150 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 42 treesize of output 36 [2023-11-22 18:53:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:53:04,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:05,239 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 42 treesize of output 38 [2023-11-22 18:53:05,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:53:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 154 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:53:05,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421277423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:05,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:05,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2023-11-22 18:53:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269881473] [2023-11-22 18:53:05,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-22 18:53:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-22 18:53:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 18:53:05,409 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:08,269 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2023-11-22 18:53:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-22 18:53:08,269 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 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 84 [2023-11-22 18:53:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:08,270 INFO L225 Difference]: With dead ends: 151 [2023-11-22 18:53:08,270 INFO L226 Difference]: Without dead ends: 142 [2023-11-22 18:53:08,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1239, Invalid=11417, Unknown=0, NotChecked=0, Total=12656 [2023-11-22 18:53:08,271 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 377 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:08,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 605 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 18:53:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-22 18:53:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2023-11-22 18:53:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2023-11-22 18:53:08,284 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2023-11-22 18:53:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:08,285 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2023-11-22 18:53:08,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2023-11-22 18:53:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-22 18:53:08,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:08,285 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:08,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-22 18:53:08,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:08,492 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:08,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1419853037, now seen corresponding path program 14 times [2023-11-22 18:53:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:08,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162265921] [2023-11-22 18:53:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:53:09,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162265921] [2023-11-22 18:53:09,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162265921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780988249] [2023-11-22 18:53:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:53:09,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:09,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:09,018 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:09,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 18:53:09,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:53:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:09,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-22 18:53:09,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:09,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:53:09,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:09,325 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 23 treesize of output 18 [2023-11-22 18:53:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:53:09,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:09,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:53:09,924 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 12 [2023-11-22 18:53:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:53:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780988249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:09,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:09,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 44 [2023-11-22 18:53:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171663138] [2023-11-22 18:53:09,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:09,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-22 18:53:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-22 18:53:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 18:53:09,938 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:11,682 INFO L93 Difference]: Finished difference Result 195 states and 211 transitions. [2023-11-22 18:53:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-22 18:53:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 0 states have call successors, (0), 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 89 [2023-11-22 18:53:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:11,683 INFO L225 Difference]: With dead ends: 195 [2023-11-22 18:53:11,683 INFO L226 Difference]: Without dead ends: 193 [2023-11-22 18:53:11,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=10404, Unknown=0, NotChecked=0, Total=11342 [2023-11-22 18:53:11,685 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 2328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:11,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 360 Invalid, 2328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 18:53:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-22 18:53:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2023-11-22 18:53:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-11-22 18:53:11,698 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 89 [2023-11-22 18:53:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:11,698 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-11-22 18:53:11,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-11-22 18:53:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-22 18:53:11,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:11,699 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:11,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:11,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:11,910 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1782091942, now seen corresponding path program 15 times [2023-11-22 18:53:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481936366] [2023-11-22 18:53:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 219 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:53:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481936366] [2023-11-22 18:53:12,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481936366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617506115] [2023-11-22 18:53:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:53:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:12,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:12,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 18:53:12,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-22 18:53:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:12,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-22 18:53:12,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:12,901 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 13 treesize of output 9 [2023-11-22 18:53:12,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:12,923 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:53:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:53:13,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:13,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:53:13,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-22 18:53:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:53:13,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617506115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:13,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:13,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2023-11-22 18:53:13,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428878875] [2023-11-22 18:53:13,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:13,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 18:53:13,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 18:53:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2913, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 18:53:13,773 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:16,954 INFO L93 Difference]: Finished difference Result 321 states and 343 transitions. [2023-11-22 18:53:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-22 18:53:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 0 states have call successors, (0), 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 94 [2023-11-22 18:53:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:16,956 INFO L225 Difference]: With dead ends: 321 [2023-11-22 18:53:16,956 INFO L226 Difference]: Without dead ends: 192 [2023-11-22 18:53:16,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1871, Invalid=16489, Unknown=0, NotChecked=0, Total=18360 [2023-11-22 18:53:16,957 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1089 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:16,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 768 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 18:53:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-22 18:53:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 101. [2023-11-22 18:53:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2023-11-22 18:53:16,976 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2023-11-22 18:53:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:16,976 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2023-11-22 18:53:16,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2023-11-22 18:53:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-22 18:53:16,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:16,977 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:16,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:17,180 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:17,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -48075095, now seen corresponding path program 16 times [2023-11-22 18:53:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750650158] [2023-11-22 18:53:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 296 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:18,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:18,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750650158] [2023-11-22 18:53:18,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750650158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:18,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127811442] [2023-11-22 18:53:18,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:53:18,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:18,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:18,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 18:53:18,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:53:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:18,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 18:53:18,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:18,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 18:53:18,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,495 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:53:18,549 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 23 treesize of output 22 [2023-11-22 18:53:18,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,582 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 3 case distinctions, treesize of input 34 treesize of output 32 [2023-11-22 18:53:18,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,620 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 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-22 18:53:18,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 46 [2023-11-22 18:53:18,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,707 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 3 case distinctions, treesize of input 41 treesize of output 46 [2023-11-22 18:53:18,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 58 [2023-11-22 18:53:18,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2023-11-22 18:53:18,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 70 [2023-11-22 18:53:18,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2023-11-22 18:53:18,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:18,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 82 [2023-11-22 18:53:19,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:19,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2023-11-22 18:53:19,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:19,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 85 [2023-11-22 18:53:20,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:20,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 25 [2023-11-22 18:53:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:53:20,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:21,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-22 18:53:21,186 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 24 treesize of output 20 [2023-11-22 18:53:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 296 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127811442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:21,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 35, 22] total 66 [2023-11-22 18:53:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302331072] [2023-11-22 18:53:21,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:21,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-22 18:53:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-22 18:53:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4049, Unknown=0, NotChecked=0, Total=4290 [2023-11-22 18:53:21,221 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:24,493 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2023-11-22 18:53:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-22 18:53:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-11-22 18:53:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:24,495 INFO L225 Difference]: With dead ends: 155 [2023-11-22 18:53:24,495 INFO L226 Difference]: Without dead ends: 146 [2023-11-22 18:53:24,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 149 SyntacticMatches, 21 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=864, Invalid=12018, Unknown=0, NotChecked=0, Total=12882 [2023-11-22 18:53:24,496 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 356 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:24,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 700 Invalid, 3858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-22 18:53:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-22 18:53:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 106. [2023-11-22 18:53:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2023-11-22 18:53:24,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 100 [2023-11-22 18:53:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:24,514 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2023-11-22 18:53:24,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2023-11-22 18:53:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-22 18:53:24,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:24,515 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:24,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:24,728 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:24,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -929229718, now seen corresponding path program 17 times [2023-11-22 18:53:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:24,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628539317] [2023-11-22 18:53:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:53:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628539317] [2023-11-22 18:53:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628539317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896843286] [2023-11-22 18:53:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:53:25,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:25,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 18:53:26,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-22 18:53:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:26,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-22 18:53:26,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:26,560 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 [2023-11-22 18:53:26,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:26,594 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 23 treesize of output 18 [2023-11-22 18:53:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:27,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:27,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:53:27,350 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 12 [2023-11-22 18:53:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:27,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896843286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:27,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:27,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 24] total 57 [2023-11-22 18:53:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307305713] [2023-11-22 18:53:27,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:27,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 18:53:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 18:53:27,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 18:53:27,368 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:31,814 INFO L93 Difference]: Finished difference Result 273 states and 292 transitions. [2023-11-22 18:53:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-11-22 18:53:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 0 states have call successors, (0), 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 105 [2023-11-22 18:53:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:31,815 INFO L225 Difference]: With dead ends: 273 [2023-11-22 18:53:31,815 INFO L226 Difference]: Without dead ends: 271 [2023-11-22 18:53:31,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10721 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2833, Invalid=29747, Unknown=0, NotChecked=0, Total=32580 [2023-11-22 18:53:31,818 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 616 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:31,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 520 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-22 18:53:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-22 18:53:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 111. [2023-11-22 18:53:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-11-22 18:53:31,838 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 105 [2023-11-22 18:53:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:31,838 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-11-22 18:53:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-11-22 18:53:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-22 18:53:31,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:31,839 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:31,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:32,045 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:32,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash -229056695, now seen corresponding path program 18 times [2023-11-22 18:53:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054214002] [2023-11-22 18:53:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 322 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054214002] [2023-11-22 18:53:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054214002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:32,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539269260] [2023-11-22 18:53:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:53:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:32,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:32,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 18:53:33,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-22 18:53:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:33,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 18:53:33,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 378 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:34,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 378 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:53:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539269260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:34,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:34,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 70 [2023-11-22 18:53:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855917895] [2023-11-22 18:53:34,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-22 18:53:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-22 18:53:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2023-11-22 18:53:34,757 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:35,260 INFO L93 Difference]: Finished difference Result 274 states and 285 transitions. [2023-11-22 18:53:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 18:53:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 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 110 [2023-11-22 18:53:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:35,264 INFO L225 Difference]: With dead ends: 274 [2023-11-22 18:53:35,264 INFO L226 Difference]: Without dead ends: 121 [2023-11-22 18:53:35,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1500, Invalid=4980, Unknown=0, NotChecked=0, Total=6480 [2023-11-22 18:53:35,265 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 560 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:35,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 258 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:53:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-22 18:53:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-11-22 18:53:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2023-11-22 18:53:35,286 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 110 [2023-11-22 18:53:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:35,286 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2023-11-22 18:53:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2023-11-22 18:53:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-22 18:53:35,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:35,287 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:35,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-22 18:53:35,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:35,491 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:35,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1731668824, now seen corresponding path program 19 times [2023-11-22 18:53:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430478047] [2023-11-22 18:53:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 80 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:53:36,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430478047] [2023-11-22 18:53:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430478047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883235894] [2023-11-22 18:53:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:53:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:36,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:36,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 18:53:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:36,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-22 18:53:36,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:36,792 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 [2023-11-22 18:53:36,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:36,825 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 23 treesize of output 18 [2023-11-22 18:53:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:36,861 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 23 treesize of output 22 [2023-11-22 18:53:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:36,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:36,894 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 42 treesize of output 36 [2023-11-22 18:53:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 79 proven. 432 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:53:37,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:38,784 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 42 treesize of output 38 [2023-11-22 18:53:38,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:53:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 79 proven. 367 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-22 18:53:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883235894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:39,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 70 [2023-11-22 18:53:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758248767] [2023-11-22 18:53:39,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-22 18:53:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-22 18:53:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4456, Unknown=1, NotChecked=0, Total=4830 [2023-11-22 18:53:39,040 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:44,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:53:46,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:53:50,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:53:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:57,681 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2023-11-22 18:53:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 18:53:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 0 states have call successors, (0), 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 116 [2023-11-22 18:53:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:57,682 INFO L225 Difference]: With dead ends: 147 [2023-11-22 18:53:57,682 INFO L226 Difference]: Without dead ends: 138 [2023-11-22 18:53:57,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1048, Invalid=11378, Unknown=6, NotChecked=0, Total=12432 [2023-11-22 18:53:57,685 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 239 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 74 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:57,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 973 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2343 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2023-11-22 18:53:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-22 18:53:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2023-11-22 18:53:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2023-11-22 18:53:57,706 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 116 [2023-11-22 18:53:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:57,706 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2023-11-22 18:53:57,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:53:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2023-11-22 18:53:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-22 18:53:57,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:57,707 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:57,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 18:53:57,907 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:57,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1051610454, now seen corresponding path program 20 times [2023-11-22 18:53:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:57,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600833469] [2023-11-22 18:53:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:53:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600833469] [2023-11-22 18:53:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600833469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533860113] [2023-11-22 18:53:59,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:53:59,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:59,758 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:53:59,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 18:53:59,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:53:59,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:59,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-22 18:53:59,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:00,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:54:00,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,178 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 23 treesize of output 18 [2023-11-22 18:54:00,229 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 [2023-11-22 18:54:00,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,260 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 30 treesize of output 28 [2023-11-22 18:54:00,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,296 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 [2023-11-22 18:54:00,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 38 [2023-11-22 18:54:00,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-22 18:54:00,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 48 [2023-11-22 18:54:00,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-22 18:54:00,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 58 [2023-11-22 18:54:00,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-22 18:54:00,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 68 [2023-11-22 18:54:00,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-22 18:54:00,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 78 [2023-11-22 18:54:00,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-22 18:54:00,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:00,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 81 [2023-11-22 18:54:02,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:02,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 64 treesize of output 28 [2023-11-22 18:54:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:54:02,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:03,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-22 18:54:03,594 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 24 treesize of output 20 [2023-11-22 18:54:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 424 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533860113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:03,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:03,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 40, 25] total 96 [2023-11-22 18:54:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344597136] [2023-11-22 18:54:03,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:03,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-22 18:54:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-22 18:54:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=8600, Unknown=0, NotChecked=0, Total=9120 [2023-11-22 18:54:03,933 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:15,609 INFO L93 Difference]: Finished difference Result 377 states and 406 transitions. [2023-11-22 18:54:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-22 18:54:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 0 states have call successors, (0), 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 116 [2023-11-22 18:54:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:15,620 INFO L225 Difference]: With dead ends: 377 [2023-11-22 18:54:15,620 INFO L226 Difference]: Without dead ends: 368 [2023-11-22 18:54:15,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 159 SyntacticMatches, 20 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20022 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=4086, Invalid=53754, Unknown=0, NotChecked=0, Total=57840 [2023-11-22 18:54:15,625 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1253 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 7021 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 7611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 7021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:15,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1060 Invalid, 7611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 7021 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-22 18:54:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-22 18:54:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 122. [2023-11-22 18:54:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2023-11-22 18:54:15,652 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 116 [2023-11-22 18:54:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:15,652 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2023-11-22 18:54:15,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2023-11-22 18:54:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-22 18:54:15,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:15,653 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:15,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 18:54:15,853 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1426925833, now seen corresponding path program 21 times [2023-11-22 18:54:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807812900] [2023-11-22 18:54:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:54:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:54:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807812900] [2023-11-22 18:54:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807812900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:54:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075879866] [2023-11-22 18:54:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:54:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:54:16,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:54:16,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 18:54:17,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-22 18:54:17,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:54:17,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-22 18:54:17,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:17,368 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 13 treesize of output 9 [2023-11-22 18:54:17,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:17,375 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:54:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:17,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:18,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:54:18,103 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 12 [2023-11-22 18:54:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075879866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:18,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:18,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 45 [2023-11-22 18:54:18,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34759278] [2023-11-22 18:54:18,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:18,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-22 18:54:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-22 18:54:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 18:54:18,122 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:21,807 INFO L93 Difference]: Finished difference Result 321 states and 343 transitions. [2023-11-22 18:54:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-11-22 18:54:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 0 states have call successors, (0), 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 121 [2023-11-22 18:54:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:21,808 INFO L225 Difference]: With dead ends: 321 [2023-11-22 18:54:21,808 INFO L226 Difference]: Without dead ends: 319 [2023-11-22 18:54:21,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8764 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1463, Invalid=24619, Unknown=0, NotChecked=0, Total=26082 [2023-11-22 18:54:21,810 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 292 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 3877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:21,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 549 Invalid, 3877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-22 18:54:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-22 18:54:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 127. [2023-11-22 18:54:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-11-22 18:54:21,837 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 121 [2023-11-22 18:54:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:21,837 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-11-22 18:54:21,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-11-22 18:54:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-22 18:54:21,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:21,838 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:21,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 18:54:22,052 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:22,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -601369078, now seen corresponding path program 22 times [2023-11-22 18:54:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:22,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979486559] [2023-11-22 18:54:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 445 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:22,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:54:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979486559] [2023-11-22 18:54:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979486559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:54:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850358133] [2023-11-22 18:54:22,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:54:22,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:22,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:54:22,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:54:22,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 18:54:23,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:54:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:54:23,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:54:23,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 511 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:24,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 511 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:54:24,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850358133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:24,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:24,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 78 [2023-11-22 18:54:24,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181899423] [2023-11-22 18:54:24,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-22 18:54:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-22 18:54:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=4792, Unknown=0, NotChecked=0, Total=6006 [2023-11-22 18:54:24,684 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:25,687 INFO L93 Difference]: Finished difference Result 313 states and 324 transitions. [2023-11-22 18:54:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 18:54:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 0 states have call successors, (0), 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 126 [2023-11-22 18:54:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:25,688 INFO L225 Difference]: With dead ends: 313 [2023-11-22 18:54:25,688 INFO L226 Difference]: Without dead ends: 137 [2023-11-22 18:54:25,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4064 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2288, Invalid=8632, Unknown=0, NotChecked=0, Total=10920 [2023-11-22 18:54:25,689 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 697 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:25,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 455 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:54:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-22 18:54:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2023-11-22 18:54:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2023-11-22 18:54:25,718 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 126 [2023-11-22 18:54:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:25,718 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2023-11-22 18:54:25,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2023-11-22 18:54:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-22 18:54:25,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:25,719 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:25,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:25,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:25,919 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:25,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 6258379, now seen corresponding path program 23 times [2023-11-22 18:54:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:25,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577348319] [2023-11-22 18:54:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 575 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:54:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577348319] [2023-11-22 18:54:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577348319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:54:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13321879] [2023-11-22 18:54:27,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:54:27,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:54:27,557 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:54:27,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 18:54:28,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-22 18:54:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:54:28,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-22 18:54:28,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:28,690 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 13 treesize of output 9 [2023-11-22 18:54:28,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:28,727 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:54:28,771 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-22 18:54:28,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-22 18:54:28,814 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:54:28,814 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 3 case distinctions, treesize of input 47 treesize of output 40 [2023-11-22 18:54:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 93 proven. 508 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-22 18:54:30,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:32,063 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 42 treesize of output 38 [2023-11-22 18:54:32,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:54:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 93 proven. 508 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-22 18:54:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13321879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:32,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 81 [2023-11-22 18:54:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365049615] [2023-11-22 18:54:32,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-22 18:54:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-22 18:54:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=6065, Unknown=2, NotChecked=0, Total=6480 [2023-11-22 18:54:32,418 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:42,290 INFO L93 Difference]: Finished difference Result 357 states and 386 transitions. [2023-11-22 18:54:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-22 18:54:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 0 states have call successors, (0), 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 132 [2023-11-22 18:54:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:42,291 INFO L225 Difference]: With dead ends: 357 [2023-11-22 18:54:42,291 INFO L226 Difference]: Without dead ends: 348 [2023-11-22 18:54:42,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 216 SyntacticMatches, 13 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12577 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2938, Invalid=42216, Unknown=2, NotChecked=0, Total=45156 [2023-11-22 18:54:42,295 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 970 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 7031 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 7383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 7031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:42,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1662 Invalid, 7383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 7031 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-22 18:54:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-22 18:54:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 138. [2023-11-22 18:54:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2023-11-22 18:54:42,327 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 132 [2023-11-22 18:54:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:42,327 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2023-11-22 18:54:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2023-11-22 18:54:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-22 18:54:42,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:42,328 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:42,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 18:54:42,535 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:42,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1899340602, now seen corresponding path program 24 times [2023-11-22 18:54:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827261927] [2023-11-22 18:54:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:54:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:54:44,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827261927] [2023-11-22 18:54:44,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827261927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:54:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391215964] [2023-11-22 18:54:44,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:54:44,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:54:44,006 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:54:44,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 18:54:44,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-22 18:54:44,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:54:44,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:54:44,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:44,666 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 13 treesize of output 9 [2023-11-22 18:54:44,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:44,699 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:54:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:45,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:45,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:54:45,580 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 12 [2023-11-22 18:54:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391215964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:45,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:45,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30, 30] total 60 [2023-11-22 18:54:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24253307] [2023-11-22 18:54:45,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:45,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-22 18:54:45,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-22 18:54:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3304, Unknown=0, NotChecked=0, Total=3540 [2023-11-22 18:54:45,602 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:53,669 INFO L93 Difference]: Finished difference Result 419 states and 444 transitions. [2023-11-22 18:54:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-11-22 18:54:53,669 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 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 137 [2023-11-22 18:54:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:53,670 INFO L225 Difference]: With dead ends: 419 [2023-11-22 18:54:53,670 INFO L226 Difference]: Without dead ends: 417 [2023-11-22 18:54:53,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22363 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4029, Invalid=59223, Unknown=0, NotChecked=0, Total=63252 [2023-11-22 18:54:53,675 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1003 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 6510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:53,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 788 Invalid, 6510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-22 18:54:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-11-22 18:54:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 143. [2023-11-22 18:54:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2023-11-22 18:54:53,723 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 137 [2023-11-22 18:54:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:53,723 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2023-11-22 18:54:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2023-11-22 18:54:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-22 18:54:53,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:53,724 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:53,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:53,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 18:54:53,925 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:53,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:53,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2050388077, now seen corresponding path program 25 times [2023-11-22 18:54:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236904144] [2023-11-22 18:54:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 588 proven. 168 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:54:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236904144] [2023-11-22 18:54:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236904144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:54:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142062590] [2023-11-22 18:54:54,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:54:54,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:54,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:54:54,937 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:54:54,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 18:54:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:54:55,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 18:54:55,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:54:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 664 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:56,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 664 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:54:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142062590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:57,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 88 [2023-11-22 18:54:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235256304] [2023-11-22 18:54:57,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-22 18:54:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-22 18:54:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1698, Invalid=5958, Unknown=0, NotChecked=0, Total=7656 [2023-11-22 18:54:57,112 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:54:57,911 INFO L93 Difference]: Finished difference Result 352 states and 363 transitions. [2023-11-22 18:54:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 18:54:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 0 states have call successors, (0), 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 142 [2023-11-22 18:54:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:54:57,912 INFO L225 Difference]: With dead ends: 352 [2023-11-22 18:54:57,912 INFO L226 Difference]: Without dead ends: 153 [2023-11-22 18:54:57,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4294 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2277, Invalid=7823, Unknown=0, NotChecked=0, Total=10100 [2023-11-22 18:54:57,913 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 640 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:54:57,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 498 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:54:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-22 18:54:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2023-11-22 18:54:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 148 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2023-11-22 18:54:57,950 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 142 [2023-11-22 18:54:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:54:57,950 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2023-11-22 18:54:57,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:54:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2023-11-22 18:54:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-22 18:54:57,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:54:57,951 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:54:57,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 18:54:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:54:58,151 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:54:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:54:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 395900172, now seen corresponding path program 26 times [2023-11-22 18:54:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:54:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427003833] [2023-11-22 18:54:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:54:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:54:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:55:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 32 proven. 749 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:55:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427003833] [2023-11-22 18:55:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427003833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:55:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015996984] [2023-11-22 18:55:00,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:55:00,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:55:00,110 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:55:00,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 18:55:00,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:55:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:55:00,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 18:55:00,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:55:00,684 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 [2023-11-22 18:55:00,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:55:00,724 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 23 treesize of output 18 [2023-11-22 18:55:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:55:00,770 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 23 treesize of output 22 [2023-11-22 18:55:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:55:00,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:55:00,822 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 42 treesize of output 36 [2023-11-22 18:55:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 107 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:55:02,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:55:03,823 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 42 treesize of output 38 [2023-11-22 18:55:03,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:55:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 107 proven. 672 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-22 18:55:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015996984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:55:04,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:55:04,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 90 [2023-11-22 18:55:04,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737923118] [2023-11-22 18:55:04,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:55:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-22 18:55:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:55:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-22 18:55:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=7586, Unknown=1, NotChecked=0, Total=8010 [2023-11-22 18:55:04,302 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:55:16,780 INFO L93 Difference]: Finished difference Result 409 states and 442 transitions. [2023-11-22 18:55:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-11-22 18:55:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 0 states have call successors, (0), 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 148 [2023-11-22 18:55:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:55:16,781 INFO L225 Difference]: With dead ends: 409 [2023-11-22 18:55:16,781 INFO L226 Difference]: Without dead ends: 400 [2023-11-22 18:55:16,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 242 SyntacticMatches, 15 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16458 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3605, Invalid=56664, Unknown=1, NotChecked=0, Total=60270 [2023-11-22 18:55:16,785 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1120 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 8668 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 9120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 8668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:55:16,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 2016 Invalid, 9120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 8668 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-22 18:55:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-22 18:55:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 154. [2023-11-22 18:55:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2023-11-22 18:55:16,844 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 148 [2023-11-22 18:55:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:55:16,844 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2023-11-22 18:55:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2023-11-22 18:55:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-22 18:55:16,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:55:16,844 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:55:16,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 18:55:17,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:17,057 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:55:17,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:55:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash -571103451, now seen corresponding path program 27 times [2023-11-22 18:55:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:55:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568051584] [2023-11-22 18:55:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:55:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:55:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:55:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:55:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:55:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568051584] [2023-11-22 18:55:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568051584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:55:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575599582] [2023-11-22 18:55:18,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:55:18,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:18,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:55:18,124 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:55:18,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 18:55:19,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-22 18:55:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:55:19,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-22 18:55:19,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:55:19,603 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 13 treesize of output 9 [2023-11-22 18:55:19,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:55:19,608 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:55:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:20,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:55:20,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-22 18:55:20,615 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 12 [2023-11-22 18:55:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575599582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:55:20,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:55:20,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 55 [2023-11-22 18:55:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410004848] [2023-11-22 18:55:20,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:55:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:55:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:55:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:55:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2800, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:55:20,638 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:55:27,536 INFO L93 Difference]: Finished difference Result 477 states and 505 transitions. [2023-11-22 18:55:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-22 18:55:27,536 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 0 states have call successors, (0), 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 153 [2023-11-22 18:55:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:55:27,538 INFO L225 Difference]: With dead ends: 477 [2023-11-22 18:55:27,538 INFO L226 Difference]: Without dead ends: 475 [2023-11-22 18:55:27,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21012 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2498, Invalid=55342, Unknown=0, NotChecked=0, Total=57840 [2023-11-22 18:55:27,542 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 457 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 6481 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 6867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 6481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:55:27,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 946 Invalid, 6867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 6481 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-22 18:55:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-22 18:55:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 159. [2023-11-22 18:55:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2023-11-22 18:55:27,585 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 153 [2023-11-22 18:55:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:55:27,585 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2023-11-22 18:55:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2023-11-22 18:55:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-22 18:55:27,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:55:27,586 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:55:27,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 18:55:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:27,788 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:55:27,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:55:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash -693778066, now seen corresponding path program 28 times [2023-11-22 18:55:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:55:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164143923] [2023-11-22 18:55:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:55:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:55:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:55:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 751 proven. 203 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:28,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:55:28,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164143923] [2023-11-22 18:55:28,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164143923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:55:28,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037216957] [2023-11-22 18:55:28,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:55:28,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:55:28,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:55:28,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 18:55:29,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:55:29,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:55:29,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 18:55:29,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:55:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 837 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:30,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:55:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 837 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:55:31,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037216957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:55:31,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:55:31,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 96 [2023-11-22 18:55:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304543606] [2023-11-22 18:55:31,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:55:31,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-22 18:55:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:55:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-22 18:55:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1812, Invalid=7308, Unknown=0, NotChecked=0, Total=9120 [2023-11-22 18:55:31,403 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:55:32,824 INFO L93 Difference]: Finished difference Result 391 states and 402 transitions. [2023-11-22 18:55:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-22 18:55:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 0 states have call successors, (0), 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 158 [2023-11-22 18:55:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:55:32,825 INFO L225 Difference]: With dead ends: 391 [2023-11-22 18:55:32,825 INFO L226 Difference]: Without dead ends: 169 [2023-11-22 18:55:32,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3386, Invalid=13126, Unknown=0, NotChecked=0, Total=16512 [2023-11-22 18:55:32,826 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 744 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:55:32,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 645 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:55:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-22 18:55:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2023-11-22 18:55:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-11-22 18:55:32,873 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 158 [2023-11-22 18:55:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:55:32,873 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-11-22 18:55:32,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-11-22 18:55:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-22 18:55:32,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:55:32,874 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:55:32,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-22 18:55:33,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:33,086 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:55:33,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:55:33,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1755228911, now seen corresponding path program 29 times [2023-11-22 18:55:33,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:55:33,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333851901] [2023-11-22 18:55:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:55:33,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:55:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:55:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 1004 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:55:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:55:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333851901] [2023-11-22 18:55:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333851901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:55:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647611084] [2023-11-22 18:55:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:55:35,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:55:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:55:35,219 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:55:35,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 18:55:38,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-22 18:55:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:55:38,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:55:38,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:55:38,986 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 13 treesize of output 9 [2023-11-22 18:55:39,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:55:39,015 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:55:39,053 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-22 18:55:39,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-22 18:55:39,098 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:55:39,098 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 3 case distinctions, treesize of input 47 treesize of output 40 [2023-11-22 18:55:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 859 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-22 18:55:40,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:55:44,657 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 42 treesize of output 38 [2023-11-22 18:55:44,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:55:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 859 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-22 18:55:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647611084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:55:45,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:55:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35, 34] total 110 [2023-11-22 18:55:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248980052] [2023-11-22 18:55:45,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:55:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-22 18:55:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:55:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-22 18:55:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=11286, Unknown=8, NotChecked=0, Total=11990 [2023-11-22 18:55:45,525 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 110 states, 110 states have (on average 3.790909090909091) internal successors, (417), 110 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:55:59,322 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2023-11-22 18:55:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-22 18:55:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.790909090909091) internal successors, (417), 110 states have internal predecessors, (417), 0 states have call successors, (0), 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 164 [2023-11-22 18:55:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:55:59,323 INFO L225 Difference]: With dead ends: 207 [2023-11-22 18:55:59,323 INFO L226 Difference]: Without dead ends: 198 [2023-11-22 18:55:59,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9490 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=2162, Invalid=28272, Unknown=16, NotChecked=0, Total=30450 [2023-11-22 18:55:59,325 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 773 mSDsluCounter, 2317 mSDsCounter, 0 mSdLazyCounter, 5837 mSolverCounterSat, 307 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 6147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 5837 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:55:59,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 2371 Invalid, 6147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 5837 Invalid, 3 Unknown, 0 Unchecked, 3.3s Time] [2023-11-22 18:55:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-22 18:55:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2023-11-22 18:55:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2023-11-22 18:55:59,372 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 164 [2023-11-22 18:55:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:55:59,372 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2023-11-22 18:55:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.790909090909091) internal successors, (417), 110 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:55:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2023-11-22 18:55:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-22 18:55:59,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:55:59,373 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:55:59,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 18:55:59,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-22 18:55:59,580 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:55:59,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:55:59,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1859680015, now seen corresponding path program 30 times [2023-11-22 18:55:59,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:55:59,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894220939] [2023-11-22 18:55:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:55:59,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:55:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:56:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 36 proven. 1091 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:56:03,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:56:03,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894220939] [2023-11-22 18:56:03,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894220939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:56:03,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678967448] [2023-11-22 18:56:03,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:56:03,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:56:03,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:56:03,519 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:56:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 18:56:04,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-22 18:56:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:56:04,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-22 18:56:04,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:56:04,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:56:04,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:04,915 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 23 treesize of output 18 [2023-11-22 18:56:05,084 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 23 treesize of output 22 [2023-11-22 18:56:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:05,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:05,142 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 42 treesize of output 36 [2023-11-22 18:56:05,252 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-22 18:56:05,252 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 34 treesize of output 36 [2023-11-22 18:56:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:05,340 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:56:05,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2023-11-22 18:56:05,470 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-11-22 18:56:05,470 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 5 case distinctions, treesize of input 45 treesize of output 50 [2023-11-22 18:56:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:05,578 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-22 18:56:05,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 64 [2023-11-22 18:56:05,737 INFO L349 Elim1Store]: treesize reduction 84, result has 28.8 percent of original size [2023-11-22 18:56:05,737 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 56 treesize of output 64 [2023-11-22 18:56:05,865 INFO L349 Elim1Store]: treesize reduction 73, result has 8.8 percent of original size [2023-11-22 18:56:05,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 75 treesize of output 78 [2023-11-22 18:56:06,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:06,042 INFO L349 Elim1Store]: treesize reduction 108, result has 23.9 percent of original size [2023-11-22 18:56:06,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 67 treesize of output 78 [2023-11-22 18:56:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:06,192 INFO L349 Elim1Store]: treesize reduction 97, result has 6.7 percent of original size [2023-11-22 18:56:06,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 86 treesize of output 92 [2023-11-22 18:56:10,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:10,400 INFO L349 Elim1Store]: treesize reduction 132, result has 20.5 percent of original size [2023-11-22 18:56:10,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 78 treesize of output 92 [2023-11-22 18:56:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:12,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:12,631 INFO L349 Elim1Store]: treesize reduction 121, result has 5.5 percent of original size [2023-11-22 18:56:12,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 97 treesize of output 106 [2023-11-22 18:56:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:18,890 INFO L349 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2023-11-22 18:56:18,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 89 treesize of output 106 [2023-11-22 18:56:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:56:23,114 INFO L349 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2023-11-22 18:56:23,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 108 treesize of output 120 Killed by 15